西南农业学报2025，Vol.38Issue(7)：1357-1366,10.DOI:10.16213/j.cnki.scjas.2025.7.001
有机肥替代化肥氮对不同盐碱程度土壤有机碳矿化的影响
Effects of organic fertilizer replacing chemical fertilizer nitrogen on soil organic carbon mineralization in different saline-alkali soils
摘要
Abstract
[Objective]In order to reveal the influence mechanism of organic fertilizer replacing chemical fertilizer nitrogen on the carbon cy-cle of saline-alkali soil and evaluate its effect on soil fertility and ecological function,the study analyzed the regulation effect of organic fertil-izer on the mineralization process of organic carbon in saline-alkali soil through field experiments with different substitution ratios.[Method]The light,medium and heavy saline-alkali soil in the Yellow River irrigation area of Ningxia were taken as the research objects.The single ap-plication of chemical fertilizer(F100)was used as the control,and four proportional gradients of 15％(O15F85),30％(O30F70),45％(O45 F55)and 100％chemical fertilizer nitrogen(O100)were set up for indoor culture experiment to study its effect on soil organic carbon mineralization characteristics.[Result]The treatment of replacing chemical fertilizer nitrogen with organic fertilizer significantly reduced the soil moderate＞severe in mild and moderate saline-alkali soil.Redundancy analysis of cumulative mineralization of organic carbon and soil physical and chemical factors showed that available nitrogen was the key factor affecting the accumulation of organic carbon mineralization in mild and moderate saline-alkali soils,with contribution rates of 32.31％and 35.23％,respectively.pH was the key factor affecting the accu-mulation of organic carbon mineralization in severe saline-alkali soils,with contribution rate of 25.55％.[Conclusion]O15F85 treatment not only improves soil physical and chemical properties,but also effectively reduces the amount of organic carbon mineralization in saline-alkali soil.In production,the cumulative mineralization of organic carbon can be reduced by regulating the content of available nitrogen in mild and moderate saline-alkali soil and inhibiting the salt in severe saline-alkali soil.关键词
引黄灌区/有机肥替代化肥/盐碱土壤/有机碳矿化Key words
Yellow River irrigation area/Organic fertilizer instead of chemical fertilizer/Saline-alkali soil/Organic carbon mineralization分类
农业科技引用本文复制引用
王生博,纪立东,李龙..有机肥替代化肥氮对不同盐碱程度土壤有机碳矿化的影响[J].西南农业学报,2025,38(7):1357-1366,10.基金项目
宁夏回族自治区农业高质量发展和生态保护科技创新示范项目(NGSB-2021-11-07) （NGSB-2021-11-07）
宁夏回族自治区重点研发计划(2022BEG02004) （2022BEG02004）
