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Wang F, Shi L, Zhang R, Xu W, Bo Y. Effects of nitrogen addition and Bothriochloa ischaemum and Lespedeza davurica mixture on plant chlorophyll fluorescence and community production in semi-arid grassland. FRONTIERS IN PLANT SCIENCE 2024; 15:1400309. [PMID: 38984159 PMCID: PMC11232416 DOI: 10.3389/fpls.2024.1400309] [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: 03/13/2024] [Accepted: 06/06/2024] [Indexed: 07/11/2024]
Abstract
Background Grass-legume mixture can effectively improve productivity and stimulate overyielding in artificial grasslands, but may be N-limited in semi-arid regions. This study investigated the effects of N addition on chlorophyll fluorescence and production in the grass-legume mixtures community. Methods An N addition experiment was conducted in the Bothriochloa ischaemum and Lespedeza davurica mixture community, with seven mixture ratios (B0L10, B2L8, B4L6, B5L5, B6L4, B8L2, and B10L0) according to the sowing abundance of B.ischaemum and L.davurica and four N addition levels, N0, N25, N50, and N75 (0,25,50,75kgNhm-2 a-1), respectively. We analyzed the response of chlorophyll fluorescence parameters of the two species, the rapid light-response curves of chlorophyll fluorescence, as well as aboveground biomass (AGB) and overyielding. Results Our results showed that the two species showed different photosynthetic strategies, with L.davurica having significantly higher initial fluorescence (Fo), effective photochemical quantum yield of PSII (ΦPSII), and coefficient of photochemical fluorescence quenching (qP) than B. ischaemum, consisting with results of rapid light-response curves. N addition and mixture ratio both had significant effects on chlorophyll fluorescence and AGB (p<0.001). The ΦPSII and qP of L.davurica were significantly lowest in B5L5 and B6L4 under N addition, and the effect of N varied with mixture ratio. The photosynthetic efficiency of B. ischaemum was higher in mixture than in monoculture (B10L0), and ΦPSII was significantly higher in N50 than in N25 and N50 at mixture communities except at B5L5. The community AGB was significantly higher in mixture communities than in two monocultures and highest at B6L4. In the same mixture ratio, the AGB was highest under the N50. The overyielding effects were significantly highest under the N75 and B6L4 treatments, mainly attributed to L.davurica. The partial least squares path models demonstrated that adding N increased soil nutrient content, and complementary utilization by B.ischaemum and L.davurica increased the photosynthetic efficiency. However, as the different photosynthetic strategies of these two species, the effect on AGB was offset, and the mixture ratio's effects were larger than N. Our results proposed the B6L4 and N50 treatments were the optimal combination, with the highest AGB and overyielding, moderate grass-legume ratio, optimal community structure, and forage values.
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Affiliation(s)
- Fugang Wang
- College of Life Science, Yulin University, Yulin, China
| | - Lei Shi
- College of Life Science, Yulin University, Yulin, China
| | - Ruiyi Zhang
- College of Life Science, Yulin University, Yulin, China
| | - Weizhou Xu
- College of Life Science, Yulin University, Yulin, China
- Shaanxi Engineering Research Center of Forage Plants of the Loess Plateau, Yulin University, Yulin, Shaanxi, China
| | - Yaojun Bo
- College of Life Science, Yulin University, Yulin, China
- Shaanxi Engineering Research Center of Forage Plants of the Loess Plateau, Yulin University, Yulin, Shaanxi, China
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Song H, Peng C, Zhang K, Zhu Q. Integrating major agricultural practices into the TRIPLEX-GHG model v2.0 for simulating global cropland nitrous oxide emissions: Development, sensitivity analysis and site evaluation. THE SCIENCE OF THE TOTAL ENVIRONMENT 2022; 843:156945. [PMID: 35764156 DOI: 10.1016/j.scitotenv.2022.156945] [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: 02/28/2022] [Revised: 06/20/2022] [Accepted: 06/20/2022] [Indexed: 06/15/2023]
Abstract
Nitrous oxide (N2O) emissions from croplands are one of the most important greenhouse gas sources while the estimation of which remains large uncertainties globally. To simulate N2O emissions from global croplands, the process-based TRIPLEX-GHG model v2.0 was improved by coupling the major agricultural activities. Sensitivity experiment was used to measure the impact of the integrated processes to modeled N2O emission found chemical N fertilization have the highest relative effect sizes. While the coefficient of the NO3- consumption rate for denitrification (COEdNO3), controlling the first step of the denitrification process was identified to be the most sensitive parameter based on sensitivity analysis of model parameters. The model performed well when simulating the magnitude of the daily N2O emissions for 39 calibration sites and the continental mean of the parameters were used to producing reasonable estimations for the means of the measured daily N2O fluxes (R2 = 0.87, slope = 1.07) and emission factors (EFs, R2 = 0.70, slope = 0.72) during the experiment periods. The model reliability was further confirmed by model validation. General trend of modeled daily N2O emissions were reasonably consistent with the observations of selected validated sites. In addition, high correlations between the results of modeled and observed mean N2O emissions (R2 = 0.86, slope = 0.82) and EFs (R2 = 0.66, slope = 0.83) from 68 validation sites were obtained. Further improvement on more detailed estimations for the variation of the environmental factors, management effects as well as accurate model input model driving data are required to reduce the uncertainties of model simulations. Consequently, our simulation results demonstrate that the TRIPLEX-GHG model v2.0 can reliably estimate N2O emissions from various croplands at the global scale, which contributes to closing global N2O budget and sustainable development of agriculture.
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Affiliation(s)
- Hanxiong Song
- Institut des sciences de l'environnement, Université du Québec à Montréal, Montreal, Case Postale 8888, Succ. Centre-Ville, Montreal H3C 3P8, Canada.
| | - Changhui Peng
- Institut des sciences de l'environnement, Université du Québec à Montréal, Montreal, Case Postale 8888, Succ. Centre-Ville, Montreal H3C 3P8, Canada; School of Geographic Sciences, Hunan Normal University, Changsha 410081, China.
| | - Kerou Zhang
- Institute of Wetland Research, Chinese Academy of Forestry, Beijing 100091, China.
| | - Qiuan Zhu
- College of Hydrology and Water Resources, Hohai University, Nanjing 210024, China.
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Abalos D, Recous S, Butterbach-Bahl K, De Notaris C, Rittl TF, Topp CFE, Petersen SO, Hansen S, Bleken MA, Rees RM, Olesen JE. A review and meta-analysis of mitigation measures for nitrous oxide emissions from crop residues. THE SCIENCE OF THE TOTAL ENVIRONMENT 2022; 828:154388. [PMID: 35276154 DOI: 10.1016/j.scitotenv.2022.154388] [Citation(s) in RCA: 10] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 11/29/2021] [Revised: 02/15/2022] [Accepted: 03/04/2022] [Indexed: 06/14/2023]
Abstract
Crop residues are of crucial importance to maintain or even increase soil carbon stocks and fertility, and thereby to address the global challenge of climate change mitigation. However, crop residues can also potentially stimulate emissions of the greenhouse gas nitrous oxide (N2O) from soils. A better understanding of how to mitigate N2O emissions due to crop residue management while promoting positive effects on soil carbon is needed to reconcile the opposing effects of crop residues on the greenhouse gas balance of agroecosystems. Here, we combine a literature review and a meta-analysis to identify and assess measures for mitigating N2O emissions due to crop residue application to agricultural fields. Our study shows that crop residue removal, shallow incorporation, incorporation of residues with C:N ratio > 30 and avoiding incorporation of residues from crops terminated at an immature physiological stage, are measures leading to significantly lower N2O emissions. Other practices such as incorporation timing and interactions with fertilisers are less conclusive. Several of the evaluated N2O mitigation measures implied negative side-effects on yield, soil organic carbon storage, nitrate leaching and/or ammonia volatilization. We identified additional strategies with potential to reduce crop residue N2O emissions without strong negative side-effects, which require further research. These are: a) treatment of crop residues before field application, e.g., conversion of residues into biochar or anaerobic digestate, b) co-application with nitrification inhibitors or N-immobilizing materials such as compost with a high C:N ratio, paper waste or sawdust, and c) use of residues obtained from crop mixtures. Our study provides a scientific basis to be developed over the coming years on how to increase the sustainability of agroecosystems though adequate crop residue management.
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Affiliation(s)
- Diego Abalos
- Department of Agroecology, iCLIMATE, Aarhus University, Blichers Alle 20, 8830 Tjele, Denmark.
| | - Sylvie Recous
- Université de Reims Champagne Ardenne, INRAE, FARE, UMR A 614, 51097 Reims, France
| | - Klaus Butterbach-Bahl
- Institute of Meteorology and Climate Research (IMK-IFU), Karlsruhe Institute of Technology, Garmisch-Partenkirchen 82467, Germany
| | - Chiara De Notaris
- Department of Agroecology, iCLIMATE, Aarhus University, Blichers Alle 20, 8830 Tjele, Denmark
| | - Tatiana F Rittl
- NORSØK-Norwegian Centre for Organic Agriculture, Gunnars veg 6, 6630 Tingvoll, Norway
| | - Cairistiona F E Topp
- Scotland's Rural College, Kings Buildings, West Mains Road, Edinburgh EH9 3JG, UK
| | - Søren O Petersen
- Department of Agroecology, iCLIMATE, Aarhus University, Blichers Alle 20, 8830 Tjele, Denmark
| | - Sissel Hansen
- NORSØK-Norwegian Centre for Organic Agriculture, Gunnars veg 6, 6630 Tingvoll, Norway
| | - Marina A Bleken
- Norwegian University of Life Sciences, Faculty of Environmental Sciences and Natural Resource Management, Elizabeth Stephensv. 13, 1433 Ås, Norway
| | - Robert M Rees
- Scotland's Rural College, Kings Buildings, West Mains Road, Edinburgh EH9 3JG, UK
| | - Jørgen E Olesen
- Department of Agroecology, iCLIMATE, Aarhus University, Blichers Alle 20, 8830 Tjele, Denmark
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Davamani V, Poornima R, Arulmani S, Parameswari E, John JE, Deepasri M. Mitigation of nitrous oxide emission through fertigation and 'N' inhibitors - A sustainable climatic crop cultivation in tomato. THE SCIENCE OF THE TOTAL ENVIRONMENT 2022; 813:152419. [PMID: 34923005 DOI: 10.1016/j.scitotenv.2021.152419] [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: 09/05/2021] [Revised: 11/14/2021] [Accepted: 12/10/2021] [Indexed: 06/14/2023]
Abstract
The impact of nitrous oxide (N2O) released from the fertilized agro-ecosystems are of increasing concern. Governing fertilizer requirements and utilizing nitrification inhibitors (NI) are effective methodologies to increase nitrogen retention and reduce N2O emissions from soil. Therefore, the effect of potassium thiosulfate (KTS) and neem-coated urea (NCU) on N2O efflux under irrigated tomato cultivation was assessed. Soil Test Crop Response (STCR) based recommendation of NPK with normal Urea and KTS at 1% of applied N (183:160:125 kg ha-1) (STCR-U + KTS) recorded the least N2O emission and high efficiency in suppressing the nitrate reductase activity. STCR-NCU was on par with STCR-U + KTS, reporting a higher reduction of N2O (21.1, 31.2, and 34.4% during the basal application, 1st and 2nd top dressing, respectively) compared to the blanket recommendation of nutrients. Similarly, STCR-U + KTS recorded the highest reduction (26.2, 25.6, and 30.9% during the basal application, 1st and 2nd top dressing, respectively) after fertilizer application. Besides, the yield of tomatoes is increased in the STCR-NCU (14.08%) and STCR-U + KTS (12.48%) with good quality fruit along (AA, Lycopene, and TSS contents) with low N2O emissions. The DeNitrification-DeComposition (DNDC) model further revealed that the simulated data and assessed findings were in good accord, proving the model's reliability and use as a tool for predicting the efficiency of fertilizer application.
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Affiliation(s)
- Veeraswamy Davamani
- Department of Environmental Sciences, Directorate of Natural Resource Management, Tamil Nadu Agricultural University, Coimbatore 641 003, Tamil Nadu, India.
| | - Ramesh Poornima
- Department of Environmental Sciences, Directorate of Natural Resource Management, Tamil Nadu Agricultural University, Coimbatore 641 003, Tamil Nadu, India
| | - Subramanian Arulmani
- Department of Chemistry, Bannari Amman Institute of Technology, Sathyamangalam 638 401, Tamil Nadu, India.
| | - Ettiyagounder Parameswari
- Department of Environmental Sciences, Directorate of Natural Resource Management, Tamil Nadu Agricultural University, Coimbatore 641 003, Tamil Nadu, India
| | - Joseph Ezra John
- Department of Environmental Sciences, Directorate of Natural Resource Management, Tamil Nadu Agricultural University, Coimbatore 641 003, Tamil Nadu, India
| | - Mohan Deepasri
- Division of Environmental Sciences, Sher-e-Kashmir University of Agricultural Sciences and Technology, Shalimar 190025, Jammu and Kashmir Union Territory, India
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Oram NJ, Sun Y, Abalos D, Groenigen JW, Hartley S, De Deyn GB. Plant traits of grass and legume species for flood resilience and N
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O mitigation. Funct Ecol 2021. [DOI: 10.1111/1365-2435.13873] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/27/2022]
Affiliation(s)
- Natalie J. Oram
- Soil Biology Group Wageningen University & Research Wageningen The Netherlands
- Department of Ecology University of Innsbruck Innsbruck Austria
- Environmental Research Centre TeagascJohnstown Castle Co Wexford Ireland
| | - Yan Sun
- Soil Biology Group Wageningen University & Research Wageningen The Netherlands
| | - Diego Abalos
- Department of Agroecology Aarhus University Tjele Denmark
| | | | - Sue Hartley
- Department of Animal and Plant Sciences University of SheffieldWestern Bank Sheffield UK
| | - Gerlinde B. De Deyn
- Soil Biology Group Wageningen University & Research Wageningen The Netherlands
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Oram NJ, De Deyn GB, Bodelier PLE, Cornelissen JHC, Groenigen JW, Abalos D. Plant community flood resilience in intensively managed grasslands and the role of the plant economic spectrum. J Appl Ecol 2020. [DOI: 10.1111/1365-2664.13667] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Affiliation(s)
- Natalie J. Oram
- Soil Biology Group Wageningen University & Research Wageningen The Netherlands
| | - Gerlinde B. De Deyn
- Soil Biology Group Wageningen University & Research Wageningen The Netherlands
| | | | - Johannes H. C. Cornelissen
- Systems Ecology Department of Ecological Science Faculty of Science Vrije Universiteit Amsterdam Amsterdam The Netherlands
| | | | - Diego Abalos
- Soil Biology Group Wageningen University & Research Wageningen The Netherlands
- Department of Agroecology – Soil Fertility Aarhus University Tjele Denmark
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