Mitigation of N_(2)O emissions in water-saving paddy fields:Evaluating organic fertilizer substitution and microbial mechanisms

作     者：Delei Kong Xianduo Zhang Qidong Yu Yaguo Jin Peikun Jiang Shuang Wu Shuwei Liu Jianwen Zou Delei Kong;Xianduo Zhang;Qidong Yu;Yaguo Jin;Peikun Jiang;Shuang Wu;Shuwei Liu;Jianwen Zou

作者机构：College of Environment and Resources/College of Carbon NeutralityZhejiang A&F UniversityHangzhou 311300China Jiangsu Key Laboratory of Low Carbon Agriculture and GHGs MitigationCollege of Resources and Environmental SciencesNanjing Agricultural UniversityNanjing 210095China Department of Biochemistry and Molecular BiologyCollege of Life SciencesNanjing Agricultural UniversityNanjing 210095China Jiangsu Key Lab and Engineering Center for Solid Organic Waste UtilizationJiangsu Collaborative Innovation Center for Solid Organic Waste Resource UtilizationNanjing Agricultural UniversityNanjing 210095China 

出 版 物：《Journal of Integrative Agriculture》 (农业科学学报（英文版）)

年 卷 期：2024年第23卷第9期

页      面：3159-3173页

核心收录：

学科分类：090101[农学-作物栽培学与耕作学] 09[农学] 0901[农学-作物学] 

基　　金：supported by the National Key Research and Development Program of China(2022YFD2300300) the National Natural Science Foundation of China(41907072) the Scientific Research Foundation of Zhejiang A&F University,China(2022LFR003) the Jiangsu Agriculture Science and Technology Innovation Fund,China(CX(21)3007) 

主　　题：organic manure substitution inorganic fertilizer N_(2)O functional microbe rice paddy 

摘      要：Water-saving irrigation strategies can successfully alleviate methane emissions from rice fields,but significantly stimulate nitrous oxide(N_(2)O)emissions because of variations in soil oxygen level and redox ***,the relationship linking soil N_(2)O emissions to nitrogen functional genes during various fertilization treatments in water-saving paddy fields has rarely been ***,the mitigation potential of organic fertilizer substitution on N_(2)O emissions and the microbial mechanism in rice fields must be further *** study examined how soil N_(2)O emissions were affected by related functional microorganisms(ammonia-oxidizing archaea(AOA),ammonia-oxidizing bacteria(AOB),nirS,nirK and nosZ)to various fertilization treatments in a rice field in southeast China over two *** this study,three fertilization regimes were applied to rice cultivation:a no nitrogen(N)(Control),an inorganic N(Ni),and an inorganic N with partial N substitution with organic manure(N_(i)+N_(o)).Over two rice-growing seasons,cumulative N_(2)O emissions averaged 0.47,4.62 and 4.08 kg ha^(−1)for the Control,Ni and N_(i)+N_(o)treatments,*** comparison to the Ni treatment,the N_(i)+N_(o)fertilization regime considerably reduced soil N_(2)O emissions by 11.6%while maintaining rice yield,with a lower N_(2)O emission factor(EF)from fertilizer N of 0.95%.Nitrogen fertilization considerably raised the AOB,nirS,nirK and nosZ gene abundances,in comparison to the Control ***,the substitution of organic manure for inorganic N fertilizer significantly decreased AOB and nirS gene abundances and increased nosZ gene *** AOB responded to N fertilization more sensitively than the *** N_(2)O emissions significantly correlated positively with AOB and nirS gene abundances while having a negative correlation with nosZ gene abundance and the nosZ/nirS ratio across N-fertilized *** summary,we conclude that organic manure substi