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Jia H, Fei X, Zhu J, Chen W, Chen R, Liao Z, Zhou B, Huang Y, Du H, Xu P, Zhang X, Li W. Soil respiration and its response to climate change and anthropogenic factors in a karst plateau wetland, southwest China. Sci Rep 2024; 14:8653. [PMID: 38622331 PMCID: PMC11018823 DOI: 10.1038/s41598-024-59495-5] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/09/2024] [Accepted: 04/11/2024] [Indexed: 04/17/2024] Open
Abstract
It is important to investigate the responses of greenhouse gases to climate change (temperature, precipitation) and anthropogenic factors in plateau wetland. Based on the DNDC model, we used meteorological, soil, and land cover data to simulate the soil CO2 emission pattern and its responses to climate change and anthropogenic factors in Guizhou, China. The results showed that the mean soil CO2 emission flux in the Caohai Karst Plateau Wetland was 5.89 ± 0.17 t·C·ha-1·yr-1 from 2000 to 2019, and the annual variation showed an increasing trend with the rate of 23.02 kg·C·ha-1·yr-1. The soil total annual mean CO2 emissions were 70.62 ± 2.04 Gg·C·yr-1 (annual growth rate was 0.28 Gg·C·yr-1). Caohai wetland has great spatial heterogeneity. The emissions around Caohai Lake were high (the areas with high, middle, and low values accounted for 3.07%, 70.96%, and 25.97%, respectively), and the emission pattern was characterized by a decrease in radiation from Caohai Lake to the periphery. In addition, the cropland and forest areas exhibited high intensities (7.21 ± 0.15 t·C·ha-1·yr-1 and 6.73 ± 0.58 t·C·ha-1·yr-1, respectively) and high total emissions (54.97 ± 1.16 Gg·C·yr-1 and 10.24 ± 0.88 Gg·C·yr-1, respectively). Croplands and forests were the major land cover types controlling soil CO2 emissions in the Caohai wetland, while anthropogenic factors (cultivation) significantly increased soil CO2 emissions. Results showed that the soil CO2 emissions were positively correlated with temperature and precipitation; and the temperature change had a greater impact on soil respiration than the change in precipitation. Our results indicated that future climate change (increased temperature and precipitation) may promote an increase in soil CO2 emissions in karst plateau wetlands, and reasonable control measures (e.g. returning cropland to lakes and reducing anthropogenic factors) are the keys to controlling CO2 emissions.
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Affiliation(s)
- Hongyu Jia
- College of Resources and Environmental Engineering, Key Laboratory of Karst Georesources and Environment (Guizhou University), Ministry of Education, Guizhou University, 2708 Huaxi Avenue, Guiyang, 550025, Guizhou, China
- Guizhou Karst Environmental Ecosystems Observation and Research Station, Ministry of Education, Guiyang, 550025, Guizhou, China
- Guizhou Provincial Double Carbon and Renewable Energy Technology Innovation Research Institute, Guiyang, 550025, Guizhou, China
| | - Xuehai Fei
- College of Resources and Environmental Engineering, Key Laboratory of Karst Georesources and Environment (Guizhou University), Ministry of Education, Guizhou University, 2708 Huaxi Avenue, Guiyang, 550025, Guizhou, China.
- Guizhou Karst Environmental Ecosystems Observation and Research Station, Ministry of Education, Guiyang, 550025, Guizhou, China.
- Guizhou Provincial Double Carbon and Renewable Energy Technology Innovation Research Institute, Guiyang, 550025, Guizhou, China.
- Guizhou Caohai Observation and Research Station for Wet Ecosystem, National Forestry and Grassland Administration, Weining, 553100, Guizhou, China.
| | - Jingyu Zhu
- College of Resources and Environmental Engineering, Key Laboratory of Karst Georesources and Environment (Guizhou University), Ministry of Education, Guizhou University, 2708 Huaxi Avenue, Guiyang, 550025, Guizhou, China
- Guizhou Karst Environmental Ecosystems Observation and Research Station, Ministry of Education, Guiyang, 550025, Guizhou, China
- Guizhou Provincial Double Carbon and Renewable Energy Technology Innovation Research Institute, Guiyang, 550025, Guizhou, China
| | - Weiduo Chen
- College of Resources and Environmental Engineering, Key Laboratory of Karst Georesources and Environment (Guizhou University), Ministry of Education, Guizhou University, 2708 Huaxi Avenue, Guiyang, 550025, Guizhou, China
- Guizhou Karst Environmental Ecosystems Observation and Research Station, Ministry of Education, Guiyang, 550025, Guizhou, China
- Guizhou Provincial Double Carbon and Renewable Energy Technology Innovation Research Institute, Guiyang, 550025, Guizhou, China
| | - Rui Chen
- College of Resources and Environmental Engineering, Key Laboratory of Karst Georesources and Environment (Guizhou University), Ministry of Education, Guizhou University, 2708 Huaxi Avenue, Guiyang, 550025, Guizhou, China
- Guizhou Karst Environmental Ecosystems Observation and Research Station, Ministry of Education, Guiyang, 550025, Guizhou, China
- Guizhou Provincial Double Carbon and Renewable Energy Technology Innovation Research Institute, Guiyang, 550025, Guizhou, China
| | - Zhangze Liao
- College of Resources and Environmental Engineering, Key Laboratory of Karst Georesources and Environment (Guizhou University), Ministry of Education, Guizhou University, 2708 Huaxi Avenue, Guiyang, 550025, Guizhou, China
- Guizhou Karst Environmental Ecosystems Observation and Research Station, Ministry of Education, Guiyang, 550025, Guizhou, China
- Guizhou Provincial Double Carbon and Renewable Energy Technology Innovation Research Institute, Guiyang, 550025, Guizhou, China
| | - Binghuang Zhou
- College of Resources and Environmental Engineering, Key Laboratory of Karst Georesources and Environment (Guizhou University), Ministry of Education, Guizhou University, 2708 Huaxi Avenue, Guiyang, 550025, Guizhou, China
- Guizhou Karst Environmental Ecosystems Observation and Research Station, Ministry of Education, Guiyang, 550025, Guizhou, China
- Guizhou Provincial Double Carbon and Renewable Energy Technology Innovation Research Institute, Guiyang, 550025, Guizhou, China
| | - Yingqian Huang
- College of Resources and Environmental Engineering, Key Laboratory of Karst Georesources and Environment (Guizhou University), Ministry of Education, Guizhou University, 2708 Huaxi Avenue, Guiyang, 550025, Guizhou, China
- Guizhou Karst Environmental Ecosystems Observation and Research Station, Ministry of Education, Guiyang, 550025, Guizhou, China
- Guizhou Provincial Double Carbon and Renewable Energy Technology Innovation Research Institute, Guiyang, 550025, Guizhou, China
| | - Haiqiang Du
- College of Resources and Environmental Engineering, Key Laboratory of Karst Georesources and Environment (Guizhou University), Ministry of Education, Guizhou University, 2708 Huaxi Avenue, Guiyang, 550025, Guizhou, China
- Guizhou Karst Environmental Ecosystems Observation and Research Station, Ministry of Education, Guiyang, 550025, Guizhou, China
- Guizhou Provincial Double Carbon and Renewable Energy Technology Innovation Research Institute, Guiyang, 550025, Guizhou, China
| | - Peng Xu
- College of Resources and Environmental Engineering, Key Laboratory of Karst Georesources and Environment (Guizhou University), Ministry of Education, Guizhou University, 2708 Huaxi Avenue, Guiyang, 550025, Guizhou, China
- Guizhou Karst Environmental Ecosystems Observation and Research Station, Ministry of Education, Guiyang, 550025, Guizhou, China
- Guizhou Provincial Double Carbon and Renewable Energy Technology Innovation Research Institute, Guiyang, 550025, Guizhou, China
| | - Xu Zhang
- Guizhou Caohai Observation and Research Station for Wet Ecosystem, National Forestry and Grassland Administration, Weining, 553100, Guizhou, China
| | - Wangjun Li
- Guizhou Province Key Laboratory of Ecological Protection and Restoration of Typical Plateau Wetlands (Guizhou University of Engineering Science), Bijie, 55170, Guizhou, China
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Liu R, Hu Y, Zhan X, Zhong J, Zhao P, Feng H, Dong Q, Siddique KHM. The response of crop yield, carbon sequestration, and global warming potential to straw and biochar applications: A meta-analysis. THE SCIENCE OF THE TOTAL ENVIRONMENT 2024; 907:167884. [PMID: 37858816 DOI: 10.1016/j.scitotenv.2023.167884] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/10/2023] [Revised: 10/07/2023] [Accepted: 10/14/2023] [Indexed: 10/21/2023]
Abstract
Organic materials play an important role in improving crop yield. However, due to variations in natural and field management practices, the impact of straw incorporation (NS) and biochar addition (NB) on soil organic carbon (SOC) sequestration and global warming potential (GWP) remains uncertain. This meta-analysis synthesizes the findings from 112 published studies, encompassing 897 samples, to assess the effects of NS and NB on crop yield, SOC, and GWP. The results reveal that Northeast China has the highest SOC stocks (40.80 Mg ha-1) and annual SOC sequestration (4.27 Mg ha-1 yr-1) compared to other regions. Notably, the NS and NB differ in their effect sizes on improving crop yield (7.68 % and 8.23 %, respectively) and SOC (6.92 % and 30.72 %, respectively), with opposing effects on GWP (increasing by 37.69 % in NS and decreasing by 23.94 % in NB). Following organic material application, climatic conditions, crop and field type, and soil properties affected SOC content and GWP. The main factors influencing variations in crop yield, SOC, and GWP were mean annual temperature and precipitation, initial SOC content, and soil pH, accounting for 57.46 %-60.29 %, 54.75 %-58.52 %, and 61.81 %-65.11 %, respectively. Considering the need to balance food demand, soil fertility and environmental benefits, biochar emerges as a recommended strategy for advancing future agriculture goals. In summary, this study quantitatively assessed the impact of organic material on crop yield, SOC, and greenhouse gas emissions, offering a scientific foundation for optimizing these factors under diverse regional conditions.
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Affiliation(s)
- Rong Liu
- College of Water Resources and Architectural Engineering, Northwest A&F University, Yangling, Shaanxi 712100, China; State Key Laboratory of Soil Erosion and Dryland Farming on the Loess Plateau, Institute of Soil and Water Conservation, Northwest A&F University, Yangling 712100, China
| | - Yiyun Hu
- College of Water Resources and Architectural Engineering, Northwest A&F University, Yangling, Shaanxi 712100, China; State Key Laboratory of Soil Erosion and Dryland Farming on the Loess Plateau, Institute of Soil and Water Conservation, Northwest A&F University, Yangling 712100, China
| | - Xiangsheng Zhan
- College of Water Resources and Architectural Engineering, Northwest A&F University, Yangling, Shaanxi 712100, China; State Key Laboratory of Soil Erosion and Dryland Farming on the Loess Plateau, Institute of Soil and Water Conservation, Northwest A&F University, Yangling 712100, China
| | - Jiawang Zhong
- College of Water Resources and Architectural Engineering, Northwest A&F University, Yangling, Shaanxi 712100, China; State Key Laboratory of Soil Erosion and Dryland Farming on the Loess Plateau, Institute of Soil and Water Conservation, Northwest A&F University, Yangling 712100, China
| | - Peng Zhao
- College of Water Resources and Architectural Engineering, Northwest A&F University, Yangling, Shaanxi 712100, China; State Key Laboratory of Soil Erosion and Dryland Farming on the Loess Plateau, Institute of Soil and Water Conservation, Northwest A&F University, Yangling 712100, China
| | - Hao Feng
- College of Water Resources and Architectural Engineering, Northwest A&F University, Yangling, Shaanxi 712100, China; State Key Laboratory of Soil Erosion and Dryland Farming on the Loess Plateau, Institute of Soil and Water Conservation, Northwest A&F University, Yangling 712100, China; Institute of Soil and Water Conservation, Northwest A&F University, Yangling, Shaanxi 712100, China
| | - Qin'ge Dong
- College of Water Resources and Architectural Engineering, Northwest A&F University, Yangling, Shaanxi 712100, China; State Key Laboratory of Soil Erosion and Dryland Farming on the Loess Plateau, Institute of Soil and Water Conservation, Northwest A&F University, Yangling 712100, China; Institute of Soil and Water Conservation, Northwest A&F University, Yangling, Shaanxi 712100, China.
| | - Kadambot H M Siddique
- The UWA Institute of Agriculture and School of Agriculture & Environment, The University of Western Australia, Perth, Western Australia, Australia
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Liu C, Wang Y, Chen H, Sun Q, Jiang Q, Wang Z. High level of winter warming aggravates soil carbon, nitrogen loss and changes greenhouse gas emission characteristics in seasonal freeze-thaw farmland soil. THE SCIENCE OF THE TOTAL ENVIRONMENT 2023; 905:167180. [PMID: 37734599 DOI: 10.1016/j.scitotenv.2023.167180] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 06/28/2023] [Revised: 09/14/2023] [Accepted: 09/16/2023] [Indexed: 09/23/2023]
Abstract
Changes in the soil environment caused by winter warming is affecting the carbon and nitrogen cycles of seasonal freeze-thaw farmland soil. A field experiment was conducted in a seasonal freeze-thaw farmland soil of northeast China to investigate the effects caused from different levels of warming (W1 + 1.77 °C, W2 + 0.69 °C and C + 0 °C) on soil carbon and nitrogen dynamics, microbial biomass and greenhouse gases fluxes. During the early and middle winter, the contents of all kinds of soil carbon and nitrogen (Ammonium, nitrate, total nitrogen, dissolved organic carbon, readily oxidizable organic carbon and soil organic carbon) tended to increase with the increase of warming level, while during the late winter, their contents under different temperature treatments roughly present trend of W2 ≥C > W1. Except for the late thawing period, warming increased the contents of soil microbial biomass carbon and nitrogen, during the late thawing period, with the increase of warming level, MBC and MBN decreased significantly. Warming would stimulate the release of greenhouse gases from soil. But due to the differences of soil environmental conditions in each period and soil nutrient dynamics under different treatments, which made the effects of different levels of warming on soil GHGs fluxes in different periods are different. Our study suggested that low-level warming improved the availability of soil carbon and nitrogen, increased the contents of microbial biomass and greenhouse gas emissions. However, although high-level winter warming showed a similar phenomenon in the early and middle winter to the low-level warming, during the late winter, high-level warming increased soil nutrients loss and broke the seasonal coupling relationship between crop nutrient acquisition and soil microbial nutrient supply, and even led to the adaptation of soil CO2 release to it. This is of great significance for exploring the carbon and nitrogen cycle mechanisms of global terrestrial ecosystem.
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Affiliation(s)
- Chuanxing Liu
- School of Water Conservancy and Civil Engineering, Northeast Agricultural University, Harbin, Heilongjiang 150030, China; Key Laboratory of Effective Utilization of Agricultural Water Resources of Ministry of Agriculture, Northeast Agricultural University, Harbin, Heilongjiang 150030, China; Heilongjiang Provincial Key Laboratory of Water Resources and Water Conservancy Engineering in Cold Region, Northeast Agricultural University, Harbin, Heilongjiang 150030, China
| | - Yiqiao Wang
- School of Water Conservancy and Civil Engineering, Northeast Agricultural University, Harbin, Heilongjiang 150030, China; Key Laboratory of Effective Utilization of Agricultural Water Resources of Ministry of Agriculture, Northeast Agricultural University, Harbin, Heilongjiang 150030, China; Heilongjiang Provincial Key Laboratory of Water Resources and Water Conservancy Engineering in Cold Region, Northeast Agricultural University, Harbin, Heilongjiang 150030, China
| | - Haohui Chen
- School of Water Conservancy and Civil Engineering, Northeast Agricultural University, Harbin, Heilongjiang 150030, China; Key Laboratory of Effective Utilization of Agricultural Water Resources of Ministry of Agriculture, Northeast Agricultural University, Harbin, Heilongjiang 150030, China; Heilongjiang Provincial Key Laboratory of Water Resources and Water Conservancy Engineering in Cold Region, Northeast Agricultural University, Harbin, Heilongjiang 150030, China
| | - Qiuyu Sun
- School of Water Conservancy and Civil Engineering, Northeast Agricultural University, Harbin, Heilongjiang 150030, China; Key Laboratory of Effective Utilization of Agricultural Water Resources of Ministry of Agriculture, Northeast Agricultural University, Harbin, Heilongjiang 150030, China; Heilongjiang Provincial Key Laboratory of Water Resources and Water Conservancy Engineering in Cold Region, Northeast Agricultural University, Harbin, Heilongjiang 150030, China
| | - Qiuxiang Jiang
- School of Water Conservancy and Civil Engineering, Northeast Agricultural University, Harbin, Heilongjiang 150030, China; Key Laboratory of Effective Utilization of Agricultural Water Resources of Ministry of Agriculture, Northeast Agricultural University, Harbin, Heilongjiang 150030, China; Heilongjiang Provincial Key Laboratory of Water Resources and Water Conservancy Engineering in Cold Region, Northeast Agricultural University, Harbin, Heilongjiang 150030, China.
| | - Zilong Wang
- School of Water Conservancy and Civil Engineering, Northeast Agricultural University, Harbin, Heilongjiang 150030, China; Key Laboratory of Effective Utilization of Agricultural Water Resources of Ministry of Agriculture, Northeast Agricultural University, Harbin, Heilongjiang 150030, China; Heilongjiang Provincial Key Laboratory of Water Resources and Water Conservancy Engineering in Cold Region, Northeast Agricultural University, Harbin, Heilongjiang 150030, China.
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He Z, Ding B, Pei S, Cao H, Liang J, Li Z. The impact of organic fertilizer replacement on greenhouse gas emissions and its influencing factors. THE SCIENCE OF THE TOTAL ENVIRONMENT 2023; 905:166917. [PMID: 37704128 DOI: 10.1016/j.scitotenv.2023.166917] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 06/17/2023] [Revised: 08/19/2023] [Accepted: 09/06/2023] [Indexed: 09/15/2023]
Abstract
Although organic fertilizers played an important role in enhancing crop yield and soil quality, the effects of organic fertilizers replacing chemical fertilizers on greenhouse gas (GHG) emissions remained inconsistent, and further impeding the widespread adoption of organic fertilizers. Therefore, a global meta-analysis used 568 comparisons from 137 publications was conducted to evaluate the responses of GHG emissions to organic fertilizers replacing chemical fertilizers. The results indicated that organic fertilizers replacing chemical fertilizers significantly decreased N2O emissions, but increasing global warming potential (GWP) by enhancing CH4 and CO2 emissions. When replacing chemical fertilizers with organic fertilizers, a variety of factors such as climate conditions, soil conditions, crop types and agricultural practices influenced the GHG emissions and GWP. Among these factors, fertilizer organic C and available N level were the main factors affecting GHG and GWP. However, considering the feasibility and ease of optimizing these factors, fertilizer organic C, C/N and N substitution rate showed a more favorable choice for GWP reduction, and their interactions significantly affecting GWP. Moreover, considering the distinct GHG emissions patterns in dryland and paddy field, the analysis of optimizing GWP based on fertilizer organic C, C/N and N substitution rate was separately conducted. According to the simulation optimization, the optimal combination of fertilizer organic C (137.2-228.8 g·kg-1), C/N (6.9-52.0) and N substitution rate (20.0-22.5 %) effectively suppressed the extent of increase in GWP in paddy field compared with chemical fertilizers. In dryland, optimizing fertilizer organic C (100-278 g·kg-1), C/N (70.7-76.6) and N substitution rate (10.2-16.0 %) led to a reduction in GWP compared with chemical fertilizers, indicating that dryland are more suitable for promoting organic fertilizer application. In conclusion, this meta-analysis study quantitatively assessed the GHG emissions when organic fertilizers replacing chemical fertilizers, and also provided a scientific basis for the mitigation of GHG emissions by organic fertilizers management.
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Affiliation(s)
- Zijian He
- Key Laboratory of Agricultural Soil and Water Engineering in Arid and Semiarid Areas, Ministry of Education, Northwest A&F University, Yangling, Shaanxi 712100, China.
| | - Bangxin Ding
- Key Laboratory of Agricultural Soil and Water Engineering in Arid and Semiarid Areas, Ministry of Education, Northwest A&F University, Yangling, Shaanxi 712100, China
| | - Shuyao Pei
- Key Laboratory of Agricultural Soil and Water Engineering in Arid and Semiarid Areas, Ministry of Education, Northwest A&F University, Yangling, Shaanxi 712100, China
| | - Hongxia Cao
- Key Laboratory of Agricultural Soil and Water Engineering in Arid and Semiarid Areas, Ministry of Education, Northwest A&F University, Yangling, Shaanxi 712100, China.
| | - Jiaping Liang
- Faculty of Modern Agricultural Engineering, Kunming University of Science and Technology, Kunming 650500, China.
| | - Zhijun Li
- Key Laboratory of Agricultural Soil and Water Engineering in Arid and Semiarid Areas, Ministry of Education, Northwest A&F University, Yangling, Shaanxi 712100, China
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Tong D, Wang Y, Yu H, Shen H, Dahlgren RA, Xu J. Viral lysing can alleviate microbial nutrient limitations and accumulate recalcitrant dissolved organic matter components in soil. THE ISME JOURNAL 2023; 17:1247-1256. [PMID: 37248401 PMCID: PMC10356844 DOI: 10.1038/s41396-023-01438-5] [Citation(s) in RCA: 2] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 01/29/2023] [Revised: 05/13/2023] [Accepted: 05/22/2023] [Indexed: 05/31/2023]
Abstract
Viruses are critical for regulating microbial communities and biogeochemical processes affecting carbon/nutrient cycling. However, the role of soil phages in controlling microbial physiological traits and intrinsic dissolved organic matter (DOM) properties remains largely unknown. Herein, microcosm experiments with different soil phage concentrates (including no-added phages, inactive phages, and three dilutions of active phages) at two temperatures (15 °C and 25 °C) were conducted to disclose the nutrient and DOM dynamics associated with viral lysing. Results demonstrated three different phases of viral impacts on CO2 emission at both temperatures, and phages played a role in maintaining Q10 within bounds. At both temperatures, microbial nutrient limitations (especially P limitation) were alleviated by viral lysing as determined by extracellular enzyme activity (decreased Vangle with active phages). Additionally, the re-utilization of lysate-derived DOM by surviving microbes stimulated an increase of microbial metabolic efficiency and recalcitrant DOM components (e.g., SUV254, SUV260 and HIX). This research provides direct experimental evidence that the "viral shuttle" exists in soils, whereby soil phages increase recalcitrant DOM components. Our findings advance the understanding of viral controls on soil biogeochemical processes, and provide a new perspective for assessing whether soil phages provide a net "carbon sink" vs. "carbon source" in soils.
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Affiliation(s)
- Di Tong
- Institute of Soil and Water Resources and Environmental Science, College of Environmental and Resource Sciences, Zhejiang University, Hangzhou, 310058, China
- Zhejiang Provincial Key Laboratory of Agricultural Resources and Environment, Zhejiang University, Hangzhou, 310058, China
| | - Youjing Wang
- Institute of Soil and Water Resources and Environmental Science, College of Environmental and Resource Sciences, Zhejiang University, Hangzhou, 310058, China
- Zhejiang Provincial Key Laboratory of Agricultural Resources and Environment, Zhejiang University, Hangzhou, 310058, China
| | - Haodan Yu
- Institute of Soil and Water Resources and Environmental Science, College of Environmental and Resource Sciences, Zhejiang University, Hangzhou, 310058, China
- Zhejiang Provincial Key Laboratory of Agricultural Resources and Environment, Zhejiang University, Hangzhou, 310058, China
| | - Haojie Shen
- Institute of Soil and Water Resources and Environmental Science, College of Environmental and Resource Sciences, Zhejiang University, Hangzhou, 310058, China
- Zhejiang Provincial Key Laboratory of Agricultural Resources and Environment, Zhejiang University, Hangzhou, 310058, China
| | - Randy A Dahlgren
- Department of Land, Air and Water Resources, University of California, Davis, CA, USA
| | - Jianming Xu
- Institute of Soil and Water Resources and Environmental Science, College of Environmental and Resource Sciences, Zhejiang University, Hangzhou, 310058, China.
- Zhejiang Provincial Key Laboratory of Agricultural Resources and Environment, Zhejiang University, Hangzhou, 310058, China.
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Li S, Zhou J, Liu Q, Liang L, Sun T, Xu X, Li M, Wang X, Yuan X. Warming influences CO 2 emissions from China's coastal saltmarsh wetlands more than changes in precipitation. THE SCIENCE OF THE TOTAL ENVIRONMENT 2023; 881:163551. [PMID: 37072101 DOI: 10.1016/j.scitotenv.2023.163551] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 12/29/2022] [Revised: 04/10/2023] [Accepted: 04/13/2023] [Indexed: 06/01/2023]
Abstract
Coastal wetlands are an important carbon sink but are sensitive to climate changes. The response of CO2 emissions to these changes differs under different hydroclimatic conditions. Here, this article used meta-analysis to synthesize data from Chinese coastal salt marshes, to analyze sensitivities for CO2 emissions, and then to assess the relative contributions of air temperature (Ta) and precipitation (Pre). This article used the ratio between potential evaporation (Ep) and Pre to divide Chinese coastal saltmarshes into water- (Ep/Pre > 1) and energy-limited regions (Ep/Pre ≤ 1). Results show that emissions are more sensitive to both Pre and Ta in water-limited regions (E¯ = 0.60 eV, slope = 0.37) than in energy-limited regions (E¯ = 0.23 eV, slope = 0.04). Comparing the relative effects of changes in Ta (△CO2 = 21.86 mg m-2 h-1) and Pre (△CO2 = 7.19 mg m-2 h-1) on CO2 emissions shows that warming contributes more to changes in CO2 emissions. The response of emissions to changes in Pre is asymmetric and shows that warmer and drier may have antagonistic effects, while warmer and wetter may have synergistic effects. There was a 2.15 mg m-2 h-1 change in emissions in energy-limited regions when Pre increased by 139.69 mm, and a decrease of -0.15 mg m-2 h-1 in emissions when Pre decreased by 1.28 mm in water-limited regions. Climate change has the greatest impact on Phragmites australis in CO2 emissions, especially under warmer and wetter conditions in energy-limited regions. This indicates that warming drives CO2 emissions, while changes in Pre (resulting in wetter or dryer conditions) can mitigate or strengthen CO2 emissions from coastal wetlands in China. This article offers a new perspective and suggests that differences in hydroclimatic conditions should be considered when discussing carbon emissions from coastal wetlands.
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Affiliation(s)
- Shuzhen Li
- State Key Laboratory of Water Environment Simulation, School of Environment, Beijing Normal University, Beijing 100875, China; Key Laboratory for Water and Sediment Sciences, Ministry of Education, School of Environment, Beijing Normal University, Beijing 100875, China
| | - Jialiang Zhou
- State Key Laboratory of Water Environment Simulation, School of Environment, Beijing Normal University, Beijing 100875, China; Key Laboratory for Water and Sediment Sciences, Ministry of Education, School of Environment, Beijing Normal University, Beijing 100875, China
| | - Qiang Liu
- State Key Laboratory of Water Environment Simulation, School of Environment, Beijing Normal University, Beijing 100875, China; Key Laboratory for Water and Sediment Sciences, Ministry of Education, School of Environment, Beijing Normal University, Beijing 100875, China.
| | - Liqiao Liang
- Key Laboratory of Tibetan Environment Changes and Land Surface Processes, Institute of Tibetan Plateau Research, Chinese Academy of Sciences, Beijing 100101, China
| | - Tao Sun
- State Key Laboratory of Water Environment Simulation, School of Environment, Beijing Normal University, Beijing 100875, China; Key Laboratory for Water and Sediment Sciences, Ministry of Education, School of Environment, Beijing Normal University, Beijing 100875, China
| | - Xiaofeng Xu
- Biology Department, San Diego State University, San Diego, CA, USA
| | - Miao Li
- State Key Laboratory of Water Environment Simulation, School of Environment, Beijing Normal University, Beijing 100875, China; Key Laboratory for Water and Sediment Sciences, Ministry of Education, School of Environment, Beijing Normal University, Beijing 100875, China
| | - Xuan Wang
- State Key Laboratory of Water Environment Simulation, School of Environment, Beijing Normal University, Beijing 100875, China; Key Laboratory for Water and Sediment Sciences, Ministry of Education, School of Environment, Beijing Normal University, Beijing 100875, China
| | - Xiaomin Yuan
- State Key Laboratory of Water Environment Simulation, School of Environment, Beijing Normal University, Beijing 100875, China; Key Laboratory for Water and Sediment Sciences, Ministry of Education, School of Environment, Beijing Normal University, Beijing 100875, China
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Yao Y, Li G, Lu Y, Liu S. Modelling the impact of climate change and tillage practices on soil CO2 emissions from dry farmland in the Loess Plateau of China. Ecol Modell 2023. [DOI: 10.1016/j.ecolmodel.2023.110276] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/09/2023]
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8
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Li A, Zhang Y, Li C, Deng Q, Fang H, Dai T, Chen C, Wang J, Fan Z, Shi W, Zhao B, Tao Q, Huang R, Li Y, Zhou W, Wu D, Yuan D, Wilson JP, Li Q. Divergent responses of cropland soil organic carbon to warming across the Sichuan Basin of China. THE SCIENCE OF THE TOTAL ENVIRONMENT 2022; 851:158323. [PMID: 36037885 DOI: 10.1016/j.scitotenv.2022.158323] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/20/2022] [Revised: 08/23/2022] [Accepted: 08/23/2022] [Indexed: 06/15/2023]
Abstract
Cropland soils are considered to have the potential to sequester carbon (C). Warming can increase soil organic C (SOC) by enhancing primary production, but it can also cause carbon release from soils. However, the role of warming in governing cropland SOC dynamics over broad geographic scales remains poorly understood. Using over 4000 soil samples collected in the 1980s and 2010s across the Sichuan Basin of China, this study assessed the warming-induced cropland SOC change and the correlations with precipitation, cropland type and soil type. Results showed mean SOC content increased from 11.10 to 13.85 g C kg-1. Larger SOC increments were observed under drier conditions (precipitation < 1050 mm, dryland and paddy-dryland rotation cropland), which were 1.67-2.23 times higher than under wetter conditions (precipitation > 1050 mm and paddy fields). Despite the significant associations of SOC increment with crop productivity, precipitation, fertilization, cropland type and soil type, warming also acted as one of major contributors to cropland SOC change. The SOC increment changed parabolically with the rise in temperature increase rate under relatively drier conditions, while temperature increase had no impact on cropland SOC increment under wetter conditions. Meanwhile, the patterns of the parabolical relationship varied with soil types in drylands, where the threshold of temperature increase rate, the point at which the SOC increment switched from increasing to decreasing with warming, was lower for clayey soils (Ali-Perudic Argosols) than for sandy soils (Purpli-Udic Cambosols). These results illustrate divergent responses of cropland SOC to warming under different environments, which were contingent on water conditions and soil types. Our findings emphasize the importance of formulating appropriate field water management for sustainable C sequestration and the necessity of incorporating environment-specific mechanisms in Earth system models for better understanding of the soil C-climate feedback in complex environments.
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Affiliation(s)
- Aiwen Li
- College of Resources, Sichuan Agricultural University, Chengdu 611130, China
| | - Yuanyuan Zhang
- College of Resources, Sichuan Agricultural University, Chengdu 611130, China
| | - Chengji Li
- College of Resources, Sichuan Agricultural University, Chengdu 611130, China
| | - Qian Deng
- College of Resources, Sichuan Agricultural University, Chengdu 611130, China
| | - Hongyan Fang
- College of Resources, Sichuan Agricultural University, Chengdu 611130, China
| | - Tianfei Dai
- College of Resources, Sichuan Agricultural University, Chengdu 611130, China; Sichuan Green Food Development Center, Chengdu 610041, China
| | - Chaoping Chen
- Meteorological Bureau of Sichuan Province, Chengdu 610041, China
| | - Jingting Wang
- Key Laboratory of Environmental and Applied Microbiology, Chengdu Institute of Biology, Chinese Academy of Science, Chengdu 610041, China
| | - Zemeng Fan
- Institute of Geographic Sciences and Natural Resources Research, Chinese Academy of Sciences, Beijing 100101, China; College of Resources and Environment, University of Chinese Academy of Sciences, Beijing 101408, China
| | - Wenjiao Shi
- Institute of Geographic Sciences and Natural Resources Research, Chinese Academy of Sciences, Beijing 100101, China; College of Resources and Environment, University of Chinese Academy of Sciences, Beijing 101408, China
| | - Bin Zhao
- College of Environmental Sciences, Sichuan Agricultural University, Chengdu 611130, China
| | - Qi Tao
- College of Resources, Sichuan Agricultural University, Chengdu 611130, China
| | - Rong Huang
- College of Resources, Sichuan Agricultural University, Chengdu 611130, China
| | - Yiding Li
- College of Resources, Sichuan Agricultural University, Chengdu 611130, China
| | - Wei Zhou
- College of Resources, Sichuan Agricultural University, Chengdu 611130, China
| | - Deyong Wu
- College of Resources, Sichuan Agricultural University, Chengdu 611130, China
| | - Dagang Yuan
- College of Resources, Sichuan Agricultural University, Chengdu 611130, China
| | - John P Wilson
- Institute of Geographic Sciences and Natural Resources Research, Chinese Academy of Sciences, Beijing 100101, China; College of Resources and Environment, University of Chinese Academy of Sciences, Beijing 101408, China; Spatial Sciences Institute, University of Southern California, Los Angeles, CA 90089-0374, USA
| | - Qiquan Li
- College of Resources, Sichuan Agricultural University, Chengdu 611130, China; Key Laboratory of Investigation and Monitoring, Protection and Utilization for Cultivated Land Resources, Ministry of Natural Resources, Chengdu 611130, China.
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Bai Y, Nan L, Wang Q, Wang W, Hai J, Yu X, Cao Q, Huang J, Zhang R, Han Y, Yang M, Yang G. Soil Respiration of Paddy Soils Were Stimulated by Semiconductor Minerals. FRONTIERS IN PLANT SCIENCE 2022; 13:941144. [PMID: 35832219 PMCID: PMC9271915 DOI: 10.3389/fpls.2022.941144] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 05/11/2022] [Accepted: 06/02/2022] [Indexed: 06/15/2023]
Abstract
Large quantities of semiconductor minerals on soil surfaces have a sensitive photoelectric response. These semiconductor minerals generate photo-electrons and photo-hole pairs that can stimulate soil oxidation-reduction reactions when exposed to sunlight. We speculated that the photocatalysis of semiconductor minerals would affect soil carbon cycles. As the main component of the carbon cycle, soil respiration from paddy soil is often ignored. Five rice cropping areas in China were chosen for soil sampling. Semiconductor minerals were measured, and three main semiconductor minerals including hematile, rutile, and manganosite were identified in the paddy soils. The identified semiconductor minerals consisted of iron, manganese, and titanium oxides. Content of Fe2O3, TiO2, and MnO in the sampled soil was between 4.21-14%, 0.91-2.72%, and 0.02-0.22%, respectively. Most abundant semiconductor mineral was found in the DBDJ rice cropping area in Jilin province, with the highest content of Fe2O3 of 14%. Soils from the five main rice cropping areas were also identified as having strong photoelectric response characteristics. The highest photoelectric response was found in the DBDJ rice cropping area in Jilin province with a maximum photocurrent density of 0.48 μA/cm2. Soil respiration was monitored under both dark and light (3,000 lux light density) conditions. Soil respiration rates in the five regions were (from highest to lowest): DBDJ > XNDJ > XBDJ > HZSJ > HNSJ. Soil respiration was positively correlated with semiconductor mineral content, and soil respiration was higher under the light treatment than the dark treatment in every rice cropping area. This result suggested that soil respiration was stimulated by semiconductor mineral photocatalysis. This analysis provided indirect evidence of the effect semiconductor mineral photocatalysis has on the carbon cycle within paddy soils, while exploring carbon conversion mechanisms that could provide a new perspective on the soil carbon cycle.
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Affiliation(s)
- Yinping Bai
- School of Environment and Resource, Southwest University of Science and Technology, Mianyang, China
- School of Life Science and Engineering, Southwest University of Science and Technology, Mianyang, China
| | - Ling Nan
- School of Resources and Environmental Engineering, Tianshui Normal University, Tianshui, China
| | - Qing Wang
- School of Life Science and Engineering, Southwest University of Science and Technology, Mianyang, China
| | - Weiqi Wang
- Key Laboratory of Humid Subtropical Eco-geographical Process, Ministry of Education, Fujian Normal University, Fuzhou, China
| | - Jiangbo Hai
- College of Agronomy, Northwest A&F University, Yangling, China
| | - Xiaoya Yu
- School of Tourism and Resources Environment, Qiannan Normal University for Nationalities, Duyun, China
| | - Qin Cao
- School of Life Science and Engineering, Southwest University of Science and Technology, Mianyang, China
| | - Jing Huang
- School of Life Science and Engineering, Southwest University of Science and Technology, Mianyang, China
| | - Rongping Zhang
- School of Life Science and Engineering, Southwest University of Science and Technology, Mianyang, China
| | - Yunwei Han
- School of Environment and Resource, Southwest University of Science and Technology, Mianyang, China
| | - Min Yang
- School of Environment and Resource, Southwest University of Science and Technology, Mianyang, China
| | - Gang Yang
- School of Life Science and Engineering, Southwest University of Science and Technology, Mianyang, China
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