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Li W, Huang A, Zhou T, Liu M, Ma S, Zhao N, Wang X, Sun J. Patterns and drivers of the belowground bud bank in alpine grasslands on the Qinghai-Tibet Plateau. FRONTIERS IN PLANT SCIENCE 2023; 13:1095864. [PMID: 36743557 PMCID: PMC9893863 DOI: 10.3389/fpls.2022.1095864] [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: 11/11/2022] [Accepted: 12/29/2022] [Indexed: 06/18/2023]
Abstract
INTRODUCTION In grassland ecosystems dominated by asexual plants, the maintenance, renewal, and resistance of plant populations to disturbance are more dependent on the belowground bud bank (BBB). However, the response of the BBB to environmental factors in the alpine grassland of the Qinghai-Tibet Plateau (QTP) is still unknown. METHODS Therefore, a transect survey was conducted to measure the size and scale of BBB and 21 factors in the alpine grassland of the QTP. In addition, the critical driving factors of BBB were screened by boost regression tree analysis, and a structural equation model (SEM) was employed to express the path coefficients of the key factors on the BBB size. RESULTS The results showed that BBB size had no significant geographical pattern in the QTP, and the BBB size was mainly accounted for by soil leucine aminopeptidase (LAP, 17.32%), followed by Margalef and Shannon -Wiener indices of plants (12.63% and 9.24%, respectively), and precipitation (9.23%). SEM further indicated significant positive effects of plant diversity (scored at 0.296) and precipitation (scored at 0.180) on BBB size, and a significant negative effect of LAP (scored at 0.280) on BBB size. DISCUSSION Generally, the findings allow for better understanding of the regulated mechanisms of BBB size and the importance of the role of bud bank in the restoration of the grassland ecosystem.
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Affiliation(s)
- Wencheng Li
- Key Laboratory of Alpine Vegetation Ecological Security, Tibet Agriculture and Animal Husbandry University, Nyingchi, China
- State Key Laboratory of Tibetan Plateau Earth System, Environment and Resources (TPESER), Institute of Tibetan Plateau Research, Chinese Academy of Sciences, Beijing, China
- College of Resources and Environment, Tibet Agriculture and Animal Husbandry University, Nyingchi, China
- Qiangtang Alpine Grassland Ecosystem Research Station (jointly built with Lanzhou University), Tibet Agricultural and Animal Husbandry University, Nyingchi, China
| | - Aiping Huang
- State Key Laboratory of Tibetan Plateau Earth System, Environment and Resources (TPESER), Institute of Tibetan Plateau Research, Chinese Academy of Sciences, Beijing, China
- College of Grassland Science and Technology, China Agricultural University, Beijing, China
| | - Tiancai Zhou
- State Key Laboratory of Tibetan Plateau Earth System, Environment and Resources (TPESER), Institute of Tibetan Plateau Research, Chinese Academy of Sciences, Beijing, China
| | - Miao Liu
- College of Grassland Science and Technology, China Agricultural University, Beijing, China
| | - Sujie Ma
- Qiangtang Alpine Grassland Ecosystem Research Station (jointly built with Lanzhou University), Tibet Agricultural and Animal Husbandry University, Nyingchi, China
- College of Animal Science, Tibet Agricultural and Animal Husbandry University, Nyingchi, China
| | - Ningning Zhao
- College of Resources and Environment, Tibet Agriculture and Animal Husbandry University, Nyingchi, China
- Qiangtang Alpine Grassland Ecosystem Research Station (jointly built with Lanzhou University), Tibet Agricultural and Animal Husbandry University, Nyingchi, China
| | - Xiangtao Wang
- Qiangtang Alpine Grassland Ecosystem Research Station (jointly built with Lanzhou University), Tibet Agricultural and Animal Husbandry University, Nyingchi, China
- College of Animal Science, Tibet Agricultural and Animal Husbandry University, Nyingchi, China
| | - Jian Sun
- State Key Laboratory of Tibetan Plateau Earth System, Environment and Resources (TPESER), Institute of Tibetan Plateau Research, Chinese Academy of Sciences, Beijing, China
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Zhou R, El-Naggar A, Li Y, Cai Y, Chang SX. Converting rice husk to biochar reduces bamboo soil N 2O emissions under different forms and rates of nitrogen additions. ENVIRONMENTAL SCIENCE AND POLLUTION RESEARCH INTERNATIONAL 2021; 28:28777-28788. [PMID: 33550547 DOI: 10.1007/s11356-021-12744-w] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 12/03/2020] [Accepted: 01/27/2021] [Indexed: 06/12/2023]
Abstract
The effects of biochar application combined with different forms and rates of inorganic nitrogen (N) addition on nitrous oxide (N2O) emissions from forest soils have not been well documented. A microcosm experiment was conducted to study the effects of rice husk and its biochar in combination with the addition of N fertilizers in different forms (ammonium [NH4+] and nitrate [NO3-]) and rates (equivalent to 150 and 300 kg N ha-1 yr-1) on N2O emissions from Lei bamboo (Phyllostachys praecox) soils. The application of rice husk significantly increased cumulative N2O emissions under the addition of both NO3--N and NH4+-N. Biochar significantly reduced cumulative N2O emissions by 15.2 and 5.8 μg N kg-1 when co-applied with the low and high rates of NO3--N, respectively, compared with the respective NO3--N addition rate without biochar. There was no significant difference in soil N2O emissions between the two NH4+-N addition rates, and cumulative N2O emission decreased with increasing soil NH4+-N concentration, mainly due to the toxic effect caused by the excessive NH4+-N on soil N2O production from the nitrification process. Cumulative N2O emissions recorded 18.74 and 14.04 μg N kg-1 under low and high rates of NO3--N addition, respectively, which were higher than those produced by NH4+-N addition. Our study demonstrated that the conversion of rice husk to biochar could reduce N2O emissions under the addition of different N forms and rates. Moreover, rice husk or its biochar in combination with NH4+-N fertilizer produced less N2O in Lei bamboo soil, compared with NO3--N fertilizer.
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Affiliation(s)
- Rong Zhou
- State Key Laboratory of Subtropical Silviculture, Zhejiang A&F University, Hangzhou, 311300, China
- Zhejiang Provincial Key Laboratory of Carbon Cycling in Forest Ecosystems and Carbon Sequestration, Zhejiang A&F University, Hangzhou, 311300, China
| | - Ali El-Naggar
- State Key Laboratory of Subtropical Silviculture, Zhejiang A&F University, Hangzhou, 311300, China
- Zhejiang Provincial Key Laboratory of Carbon Cycling in Forest Ecosystems and Carbon Sequestration, Zhejiang A&F University, Hangzhou, 311300, China
| | - Yongfu Li
- State Key Laboratory of Subtropical Silviculture, Zhejiang A&F University, Hangzhou, 311300, China
- Zhejiang Provincial Key Laboratory of Carbon Cycling in Forest Ecosystems and Carbon Sequestration, Zhejiang A&F University, Hangzhou, 311300, China
| | - Yanjiang Cai
- State Key Laboratory of Subtropical Silviculture, Zhejiang A&F University, Hangzhou, 311300, China.
- Zhejiang Provincial Key Laboratory of Carbon Cycling in Forest Ecosystems and Carbon Sequestration, Zhejiang A&F University, Hangzhou, 311300, China.
| | - Scott X Chang
- State Key Laboratory of Subtropical Silviculture, Zhejiang A&F University, Hangzhou, 311300, China
- Department of Renewable Resources, University of Alberta, 442 Earth Sciences Building, Edmonton, Alberta, T6G 2E3, Canada
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