河南农业科学2024，Vol.53Issue(5)：92-100,9.DOI:10.15933/j.cnki.1004-3268.2024.05.010
不同比例有机肥替代化肥对夏玉米氮肥利用率及N2O排放的影响
Effects of Different Ratios of Organic Fertilizers Substituting Chemical Fertilizers on Nitrogen Use Efficiency and N2O Emissions in Summer Maize Season
摘要
Abstract
This study was set up to explore the effects of different organic fertilizer substitution ratios on maize yields and plant uptake and utilization of nitrogen fertilizers in 2022 and 2023 for two consecutive years,including five treatments:No fertilizer(CK),conventional fertilizer(CF),organic fertilizers substituting 10％nitrogen fertilizer(FM1),organic fertilizer substituting 30％nitrogen fertilizer(FM2)and organic fertilizer substituting 50％nitrogen fertilizer(FM3).The results showed that compared with CF treatment,the two-year average soil bulk density of FM1,FM2,and FM3 treatments decreased by 1.43％,2.15％,and 4.67％,respectively.The two-year average soil porosity increased by 2.07％,2.60％,and 5.51％,respectively.The two-year average nitrate nitrogen content increased by 9.67％,14.86％,and 11.01％,respectively.Compared with CF treatment,FM1 treatment increased the two-year average dry matter accumulation and yield of corn plants by 3.41％and 3.42％over the two years,while FM3 treatment decreased by 3.25％and 6.73％,respectively.Compared with CF treatment,FM1 treatment increased the two-year average nitrogen accumulation by 4.49％over two years,and the two-year average nitrogen fertilizer utilization efficiency and agronomic utilization efficiency increased by 13.62％and 6.1 1％respectively.The two-year average economic benefit increased by 2.87％over two years,and the two-year average nitrogen dioxide(N2O)emission decreased by 16.41％over two years.Moreover,FM1 treatment increased the nitrogen accumulation in stems and leaves.When the proportion of organic fertilizer substituting chemical fertilizer was 30％or more(FM2,FM3 treatments),the yield and nitrogen fertilizer utilization efficiency were significantly reduced,and the economic benefit was reduced.In summary,substituting 10％chemical fertilizer with organic fertilizer can significantly improve nitrogen fertilizer utilization efficiency and reduce N2O emission,making it a recommended proportion for achieving nitrogen fertilizer reduction and green and high-yield agriculture.关键词
夏玉米/有机肥替代化肥/产量/氮肥利用率/N2O排放/经济效益Key words
Summer maize/Organic fertilizer substituting chemical fertilizer/Grain yield/Nitrogen use efficiency/N2O emission/Economic benefit分类
农业科技引用本文复制引用
李新美,李玉霞,李荣发,王群,齐红志,何家帅,杨康娜,魏跃鹏,郭航兆,孙磊康,李孝永,贾绪存..不同比例有机肥替代化肥对夏玉米氮肥利用率及N2O排放的影响[J].河南农业科学,2024,53(5):92-100,9.基金项目
国家十四五重点研发计划项目(2022YFD2300802) （2022YFD2300802）
河南省农田生态系统野外科学观测研究站项目(30602821) （30602821）
河南省软科学研究计划项目(242400410329) （242400410329）
