Positive Effects of Organic Amendments on Soil Microbes and Their Functionality in Agro-Ecosystems
文献类型： 外文期刊
作者： Liu, Weijia 1 ; Yang, Zepeng 2 ; Ye, Qinxin 1 ; Peng, Zhaohui 1 ; Zhu, Shunxi 1 ; Chen, Honglin 2 ; Liu, Dinghui 2 ; Li, Yiding 3 ; Deng, Liangji 3 ; Shu, Xiangyang 1 ; Huang, Han 5 ;
作者机构： 1.Chengdu Acad Agr & Forestry Sci, Inst Agr Bioenvironm & Energy, Chengdu 611130, Peoples R China
2.Sichuan Acad Agr Sci, Soil & Fertilizer Res Inst, Chengdu 610066, Peoples R China
3.Sichuan Agr Univ, Coll Resources, Chengdu 611130, Peoples R China
4.Sichuan Normal Univ, Minist Educ, Key Lab Land Resources Evaluat & Monitoring Southw, Chengdu 610068, Peoples R China
5.Xinjiang Agr Univ, Coll Econ & Management, Urumqi 830052, Peoples R China
关键词： organic amendments; microbes; soil fertility; crop yield; agro-ecosystem; meta-analysis
期刊名称：PLANTS-BASEL （ 影响因子：4.5； 五年影响因子：4.8 ）
ISSN：
年卷期： 2023 年 12 卷 22 期
页码：
收录情况： SCI
摘要： Soil microbial characteristics are considered to be an index for soil quality evaluation. It is generally believed that organic amendments replacing chemical fertilizers have positive effects on changing microbial activity and community structure. However, their effects on different agro-ecosystems on a global scale and their differences in different environmental conditions and experimental durations are unclear. This study performed a meta-analysis based on 94 studies with 204 observations to evaluate the overall effects and their differences in different experimental conditions and duration. The results indicated that compared to chemical fertilizer, organic amendments significantly increased total microbial biomass, bacterial biomass, fungal biomass, Gram-positive bacterial biomass and Gram-negative bacterial biomass, and had no effect on the ratio of fungi to bacteria and ratio of Gram-positive bacteria to Gram-negative bacteria. Meanwhile, land use type, mean annual precipitation and soil initial pH are essential factors affecting microbial activity response. Organic-amendment-induced shifts in microbial biomass can be predominantly explained by soil C and nutrient availability changes. Additionally, we observed positive relationships between microbial functionality and microbial biomass, suggesting that organic-amendment-induced changes in microbial activities improved soil microbial functionality.
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