Excessive manure application stimulates nitrogen cycling but only weakly promotes crop yields in an acidic Ultisol:Results from a 20-year field experiment

作     者：Song Wan Yongxin Lin Hangwei Hu Milin Deng Jianbo Fan Jizheng He Song Wan;Yongxin Lin;Hangwei Hu;Milin Deng;Jianbo Fan;Jizheng He

作者机构：Key Laboratory for Humid Subtropical Eco-geographical Processes of Ministry of EducationSchool of Geographical Sciences/School of Carbon Neutrality Future TechnologyFujian Normal UniversityFuzhou 350007China School of Agriculture and FoodFaculty of ScienceThe University of MelbourneParkvilleVictoria 3010Australia State Key Laboratory of Soil and Sustainable AgricultureInstitute of Soil ScienceChinese Academy of SciencesNanjing 210008China 

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7期

页      面：2434-2445页

核心收录：

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

基　　金：supported by the National Natural Science Foundation of China(41930756 and 42077041) 

主　　题：denitrification manure amendment nitrification N-cycling functional genes peanut yields 

摘      要：Population growth and growing demand for livestock products produce large amounts of manure,which can be harnessed to maintain soil sustainability and crop ***,the impacts of excessive manure application on crop yields,nitrogen(N)-cycling processes and microorganisms remain ***,we explored the effects of 20-year of excessive rates(18 and 27 Mg ha^(–1)yr^(–1))of pig manure application on peanut crop yields,soil nutrient contents,N-cycling processes and the abundance of N-cycling microorganisms in an acidic Ultisol in summer and winter,compared with none and a regular rate(9 Mg ha^(–1)yr^(–1))of pig manure ***-term excessive pig manure application,especially at the high-rate,significantly increased soil nutrient contents,the abundance of N-cycling functional genes,potential nitrification and denitrification activity,while it had a weaker effect on peanut yield and plant *** with manure application,seasonality had a much weaker effect on N-cycling gene *** forest analysis showed that available phosphorus(AP)content was the primary predictor for N-cycling gene abundance,with significant and positive associations with all tested N-cycling *** study clearly illustrated that excessive manure application would increase N-cycling gene abundance and potential N loss with relatively weak promotion of crop yields,providing significant implications for sustainable agriculture in the acidic Ultisols.