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Linkages of nitrogen-cycling microbial resistance and resilience to soil nutrient stoichiometry under dry-rewetting cycles with different fertilizations and temperatures in a vegetable field

文献类型: 外文期刊

作者: Shen, Haojie 1 ; Zhang, Qianqian 1 ; Bi, Ruiyu 1 ; Xu, Xintong 1 ; Zhang, Xi 1 ; Fan, Changhua 1 ; Xiong, Zhengqin 1 ;

作者机构: 1.Nanjing Agr Univ, Coll Resources & Environm Sci, Jiangsu Key Lab Low Carbon Agr & GHGs Mitigat, Nanjing 210095, Peoples R China

2.Zhejiang Univ, Coll Environm & Resource Sci, Inst Soil & Water Resources & Environm Sci, Hangzhou 310058, Peoples R China

3.Zhejiang A&F Univ, Sch Environm & Resource Sci, Hangzhou 311300, Peoples R China

4.Chinese Acad Trop Agr Sci, Inst Environm & Plant Protect, Hainan Key Lab Trop Ecocircular Agr, Danzhou Natl Agr Expt Stn Agr Environm, Haikou 571101, Hainan, Peoples R China

关键词: Dry-rewetting cycle; Nitrogen-cycling microbial population; Resistance; Resilience; Nutrient stoichiometry

期刊名称:SCIENCE OF THE TOTAL ENVIRONMENT ( 影响因子:10.753; 五年影响因子:10.237 )

ISSN: 0048-9697

年卷期: 2022 年 820 卷

页码:

收录情况: SCI

摘要: Multiple dry-rewetting (DRW) cycles occur in intensively managed vegetable fields dueto frequent tillage and irriga-tion. Soil nitrogen (N) cycling depends on the resistance and resilience of related microbial populations to DRW cycles, which could be closely related to soil nutrient status. However, the linkage of N-cycling microbial resistance and resil-ience and soil nutrient stoichiometry remains unknown in vegetable field. Here, we established four fertilization treat-ments in a four-year greenhouse vegetable field: no N fertilization, synthesized N fertilization, substituting 50% of chemical N with organic fertilizer or biofertilizer. Then, we set up an 85-day DRW-cycling incubation at 15, 25 and 35 degrees C including a 55-day fluctuating moisture for microbial resistance and then a 30-day constant moisture for micro-bial resilience. The results showed that microbial resistance was high (resistance index = 0.87- 0.99) in response to DRW cycles, but microbial resilience was generally low (resilience index = -0.36- 0.76), especially in 50% organic substitution or 15 degrees C. N-cycling microbes showed an important trade-off between their resistance and resilience to DRW cycles. Furthermore, most treatments showed microbial carbon limitation and N abundance during DRW cycles and recovered gradually to the undisturbed state. Microbial resistance was significantly related to the soil nutrient stoi-chiometry of carbon, N and phosphorus, while microbial resilience was mainly correlated with carbon-related indica-tors. In conclusion, N-cycling microbes presented good stability with oligotrophic strategy to frequent DRW cycles, which was linked to not only the historical legacy effect of DRW cycles but also soil nutrient stoichiometry in the vegetable field.

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