农业现代化研究2025，Vol.46Issue(3)：590-599,10.DOI:10.13872/j.1000-0275.2025.0067
减氮配施生物炭和炭基肥对红壤设施菜地N2O排放和NH3挥发的影响
Effects of reduced nitrogen application combined with biochar and biochar-based fertilizer application on N2O emissions and NH3 volatilization from protected vegetable fields in red soil regions
摘要
Abstract
Excessive nitrogen fertilization not only inhibits crop growth but also induces N2O emissions and NH3 volatilization,contributing to environmental pollution.Biochar and biochar-based fertilizers show potential in soil improvement and emission reduction.This study investigated the impacts of different straw-derived biochar application methods combined with chemical fertilizer reduction on N2O emissions and NH3 volatilization in a red soil vegetable greenhouse in Changsha,Hunan Province.Four treatments were established:no fertilization(CK),conventional fertilization(CON),20%nitrogen reduction+biochar-based fertilizer(BF),and 20%nitrogen reduction+biochar(BC).N2O emissions were monitored via gas chromatography,NH3 was collected using the closed chamber method,and soil nitrogen content and crop yield were measured.Results demonstrated that BF and BC treatments significantly reduced N2O emissions by 27.80%and 12.27%,respectively,with BF exhibiting a 17.70%greater reduction than BC.The N2O emission factor of BF decreased by 33.56%compared to CON,outperforming BC by 33.10%.NH3 volatilization under BF and BC declined by 20.47%and 14.26%,respectively,with BF reducing the NH3 volatilization emission factor by 25.40%,16.81%lower than BC.BF increased nitrogen use efficiency by 50.91%.Soil NH4+-N decreased by 18.03%and 11.40%under BF and BC,respectively,while NO3--N showed no significant variation.Random forest analysis identified soil NH4+-N,NO3--N,and temperature as key drivers of N2O and NH3 emissions.Fresh weight yields remained consistent across treatments.BF reduced N2O emissions per unit yield by 28.12%.In conclusion,nitrogen reduction combined with biochar or biochar-based fertilizer effectively mitigates N2O emissions and NH3 volatilization in greenhouse vegetable systems,with biochar-based fertilizer demonstrating superior performance.关键词
生物炭/炭基肥/氧化亚氮/氨挥发/设施菜地Key words
biochar/biochar-based fertilizer/nitrous oxide/ammonia volatilization/protected vegetable fields分类
农业科技引用本文复制引用
张海锋,张靖,王伟,李粤丰,王娟,吴金水,沈健林..减氮配施生物炭和炭基肥对红壤设施菜地N2O排放和NH3挥发的影响[J].农业现代化研究,2025,46(3):590-599,10.基金项目
国家重点研发计划项目(2023YFD1900902) （2023YFD1900902）
国家自然科学基金项目(42477378).Supported by the National Key Research and Development Program Project(2023YFD1900902) （42477378）
National Natural Science Foundation of China(42477378). （42477378）
