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Litter quality regulates cover crop litter decay alongside altered microbial facets

文献类型: 外文期刊

作者: Li, Guilong 1 ; Leng, Ke 1 ; Qin, Wenjing 1 ; Chen, Xiaofen 1 ; Lin, Yongxin 3 ; Liu, Ming 4 ; Wu, Meng 4 ; Fan, Jianbo 4 ; Wang, Xiaoyue 4 ; Jiang, Yuji 4 ; Liu, Jia 1 ;

作者机构: 1.Jiangxi Acad Agr Sci, Inst Soil & Fertilizer & Resources & Environm, Nanchang 330200, Peoples R China

2.Minist Agr & Rural Affairs, Key Lab Acidified Soil Ameliorat & Utilizat, Nanchang 330200, Peoples R China

3.Fujian Normal Univ, Sch Geog Sci, Key Lab Humid Subtrop Ecogeog Proc, Minist Educ, Fuzhou 350007, Peoples R China

4.Chinese Acad Sci, Key Lab Soil & Sustainable Agr, Nanjing 210008, Peoples R China

关键词: Litter type; Decay process; Litter-inhabiting microbes; Functional guilds; Network complexity

期刊名称:APPLIED SOIL ECOLOGY ( 影响因子:5.0; 五年影响因子:5.4 )

ISSN: 0929-1393

年卷期: 2024 年 204 卷

页码:

收录情况: SCI

摘要: Cover crops litter decay is a vital component of nutrient cycling in agroecosystems; however, how litter quality affect decay process via microbial facets at different decay stage remains unclear. Here, we performed a 112d decay experiment using the litter of two winter cover crop species (a legume and a grass) to clarify the relationship between the temporal dynamics of litter-inhabiting microbes and litter decay in agroecosystems. Legume litter decayed faster (k = 0.064 +/- 0.002 days(-1)) than grass litter (k = 0.053 +/- 0.003 days(-1)) during the early stage (0-28 D) of decay. Wood saprotrophs and bacteria, capable of performing lignin degradation, were generally more abundant in legume litter (0.003 % and 47.77 %, respectively) than in grass litter (0.002 % and 39.24 %, respectively) during the early stage of decay. Litter quality affected the decay process through its effects on microbial functional profiles and interactions; legume litter decay increased as the abundance of specific functional guilds increased and network complexity decreased. Overall, our findings indicated that litter quality affected litter decay process and relevant litter-inhabiting microbial facets is restricted to the early stage of decay.

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