Effects of substituting chemical fertilizers with manure on rice yield and soil labile nitrogen in paddy fields of China: A meta-analysis

作     者：Qiong HOU Yuemin NI Shan HUANG Ting ZUO Jian WANG Wuzhong NI Qiong HOU;Yuemin NI;Shan HUANG;Ting ZUO;Jian WANG;Wuzhong NI

作者机构：College of Environmental and Resource SciencesZhejiang UniversityZhejiang Provincial Key Laboratory of Agricultural Resources and EnvironmentHangzhou 310058China Agricultural Experimental StationZhejiang UniversityHangzhou 310058China 

出 版 物：《Pedosphere》 (土壤圈（英文版）)

年 卷 期：2023年第33卷第1期

页      面：172-184页

核心收录：

学科分类：09[农学] 0903[农学-农业资源与环境] 0901[农学-作物学] 

基　　金：supported by the Major Project for Support System Construction of Agriculture Green Development from the Ministry of Agriculture and Rural Affairs of China(No.NG/LS2020-71-05) the National Major Science and Technology Project of China(No.2014ZX07101-012). 

主　　题：available nitrogen climatic factors fertilization practices manure substitution microbial biomass nitrogen soil properties 

摘      要：Substituting chemical fertilizers with manure is an important method for efficient nutrient management in rice cropping systems of China.Labile nitrogen(N)is the most active component of the soil N pool and plays an essential role in soil fertility.However,the effects of manure substitution on soil labile N in rice cropping systems and their relationships with soil properties,fertilization practices,and climatic conditions remain unclear and should be systematically quantified.Here,we investigated rice grain yield and four types of soil labile N that have been widely reported,including available nitrogen(AN),ammonium nitrogen(NH_(4)^(+)-N),nitrate nitrogen(NO_(3)^(−)-N),and microbial biomass nitrogen(MBN).We reviewed 187 published articles and performed a meta-analysis to quantify the effects of manure substitution on yield and soil labile N.The results showed that manure substitution increased AN,MBN,NH+4-N,and NO−3-N by 11.3%,38.5%,5.9%,and 8.1%,respectively.Partial substitution significantly increased the yield by 1.4%–5.9%,but full substitution significantly decreased the yield by 2.9%.The positive effects of manure substitution on yield and AN were stronger with long-term fertilization.The differences in responses varied across specific manure types,N application rates,soil properties,and climatic factors.In conclusion,manure substitution can increase soil labile N and is regarded as an efficient strategy for improving soil N fertility and a recommended measure for applying both chemical and organic fertilizers in rice systems.This study provides evidence of the effects of manure substitution on yield enhancement by increasing soil labile N.