亚热带农业研究2025，Vol.21Issue(1)：27-36,10.DOI:10.13321/j.cnki.subtrop.agric.res.2025.01.004
减氮增碳对赣北湿润区农田作物产量及氮素利用的影响
Effects of reducing nitrogen and increasing carbon on crop yields and nitrogen utilization in moist area farmland in Northern Jiangxi
摘要
Abstract
[Purpose]The aim of the study is to explore the performance and stability of crop yields,soil inorganic nitrogen accu-mulation,and nitrogen fertilizer utilization efficiency under nitrogen reduction and carbon increasing measures and provide a basis for green and efficient production of crop and environmental protection of farmland in the humid plain area of Northern Jiangxi.[Method]Field experiments were conducted in Jingdezhen City and Jiujiang City of Jiangxi Province in 2021 and 2022,with four nitrogen ap-plication treatments:conventional nitrogen application(CF),nitrogen reduction of 20%(N1),nitrogen reduction and carbon in-creasing(N2:with the same amount of chemical nitrogen fertilizer application as N1 treatment,increasing carbon by straw return or replacing partial chemical nitrogen fertilizer with organic fertilizer),and no nitrogen application(CK).The effects of different nitro-gen application treatment on the dry matter allocation proportion,yields,yield sustainability,and nitrogen fertilizer partial produc-tivity of vegetables and cotton,and to compare the accumulation of inorganic nitrogen in the soil of vegetable fields and cotton fields.[Result]Compared with CF,N1 and N2 showed insignificant increases in the proportion of dry matter allocation in reproductive or-gans of crops.N2 increased vegetable yields by 7.12%to 42.83%,and the yield sustainability index of vegetables and cotton signifi-cantly increased by 12.50%,fertilizer contribution rate by 5.08%to 141.75%,and partial factor productivity of nitrogen fertilizer by 27.97%to 84.08%,while significantly decreasing soil nitrate nitrogen accumulation in vegetable and cotton fields,respectively.Com-pared with N1,N2 increased the yield sustainability index by 7.14%while increasing crop yields to different degrees.[Conclusion]On the basis of reducing the application of conventional chemical nitrogen fertilizer by 20%,adopting carbon increasing measures such as replacing chemical nitrogen fertilizer with 10%organic fertilizer in cotton fields and returning straw at 600 kg·hm-2 in vege-table fields not only increases crop yields and long-term high-yield sustainability but also significantly improves the fertilizer contri-bution rate and partial factor productivity of nitrogen fertilizer.It is an effective measure to improve the yields and promote the sus-tainable development of conventional crops such as vegetables and cotton in the humid plain area of Northern Jiangxi.关键词
蔬菜/棉花/减氮增碳/产量/氮肥偏生产力Key words
vegetable/cotton/nitrogen reduction and carbon increasing/yield/partial factor productivity of nitrogen fertilizer分类
农业科学引用本文复制引用
秦宇坤,张丽娟,崔颖,朱宗梅..减氮增碳对赣北湿润区农田作物产量及氮素利用的影响[J].亚热带农业研究,2025,21(1):27-36,10.基金项目
江西省棉花产业技术体系项目(JXARS-22-赣北片) （JXARS-22-赣北片）
棉花"直密矮"轻简高效种植技术集成与示范推广项目 （）
江西省重点研发计划项目"棉油两熟制构建及其轻简高效栽培技术研究"(20192BBFL60005). （20192BBFL60005）
