土壤2025，Vol.57Issue(5)：1034-1042,9.DOI:10.13758/j.cnki.tr.2025.05.010
氮肥配施牛粪对干旱区棉田土壤团聚体及其微生物残体氮的影响
Effects of Nitrogen Fertilizer Combined with Cattle Manure on Soil Aggregates and Their Microbial Residue Nitrogen in Cotton Field of Arid Area
摘要
Abstract
In order to study the effects of nitrogen fertilizer and its combined application with organic fertilizer on the occurrence and distribution of microbial residual nitrogen in aggregates in farmland soils in arid areas,a field positioning test was carried out in Shaya County,Aksu Prefecture,southern Xinjiang.A total of 10 treatments were set up with 5 nitrogen application rates(0,200,300,400,500 kg/hm2)and 5 nitrogen application rates combined with cattle manure(3 000 kg/hm2).In the third year of the experiment,the particle size distribution of soil aggregates,the contents of fungal and bacterial residue nitrogen were determined at the boll opening stage of cotton.The results showed that,single application of nitrogen fertilizer increased the proportion of large and small aggregates and decreased the proportion of micro aggregates,silts and clays;different amounts of nitrogen fertilizer with cattle manure increased the proportion of large aggregates and decreased the proportion of small aggregates.The same amount of nitrogen application with cattle manure only significantly increased the total nitrogen content in silts and clays.The proportion of microbial residue nitrogen content to total nitrogen content ranged from 35.93%to 49.81%,and the proportion of fungal and bacterial residue nitrogen contents to microbial residue nitrogen content ranged from 65.57%to 75.83%and 26.48%to 35.69%,respectively.The application of nitrogen fertilizer increased the content of microbial residual nitrogen,especially the fungal residual nitrogen;when the application of nitrogen was higher,the dosing of cattle manure increased the content of microbial residual nitrogen from bacteria.Both nitrogen only and nitrogen fertilizer with cattle manure decreased fungal residual nitrogen content in large and small aggregates and microaggregates,but increased bacterial residual nitrogen content.In conclusion,the application of nitrogen fertilizer and its combination with cattle manure altered the distribution of aggregates and increased the total and microbial residual nitrogen content in soil;and the combination of cattle manure contributed to the accumulation of microbial residual nitrogen at higher nitrogen application rates.关键词
干旱区/棉田/氮肥/牛粪/团聚体/微生物残体氮Key words
Arid area/Cotton field/Nitrogen fertilizer/Cattle manure/Aggregate/Microbial residue nitrogen分类
农业科技引用本文复制引用
秦金鑫,吴茂林,王昕悦,张宇辰,刘耘华,盛建东..氮肥配施牛粪对干旱区棉田土壤团聚体及其微生物残体氮的影响[J].土壤,2025,57(5):1034-1042,9.基金项目
阿克苏棉花绿色增产增效技术集成与示范项目(ZYYD2024CG03)、国家重点研发计划子课题(2022YFD190010304)和新疆棉花产业技术体系项目(XJARS-03)资助. （ZYYD2024CG03）
