有机无机肥配施对西北地区不同土壤类型氮素矿化影响OA北大核心CSTPCD
Effects of Combined Application of Organic and Inorganic Fertilizers on Nitrogen Mineralization in Different Soil Types in Northwest China
为揭示不同施肥措施和土壤类型对我国西北地区典型农田土壤氮素矿化特征的影响,通过室内恒温好气培养法,分别研究不施肥(CK)、单施尿素(U)、单施有机肥(M)和尿素配施有机肥(U+M)施肥模式对土壤氮素矿化动态过程的影响,并对土壤累积矿化氮量进行一级动力学方程拟合及相关性分析.结果表明,施肥和土壤类型均显著影响土壤铵态氮含量、硝态氮含量和累积矿化氮量,且两者之间存在显著的交互作用.不同类型土壤累积矿化氮量和矿化速率由大到小依次为塿土、黄绵土、黄河灌淤土、灰棕漠土.与CK处理相比,不同施肥处理显著增加土壤累积矿化氮量、矿化速率常数(k)和矿化势(N0),处理间差异显著(P＜0.05).单施尿素和尿素配施有机肥处理的累积矿化氮量和矿化速率分别较CK处理增加2.83～6.71倍和3.83～7.70倍.相关分析表明,土壤累积矿化氮量与土壤有机质含量和全氮含量呈显著正相关关系.研究结果表明,有机无机肥配施处理可显著促进西北地区不同土壤类型氮素矿化,提高氮素有效性和供氮能力,有利于保持土壤矿质氮含量,对农田氮素高效利用有重要作用.
An aerobic incubation method with a constant temperature was used to investigate the effects of different fertilization measures and soil types on soil nitrogen mineralization characteristics of typical farmland in Northwest China.Four fertilization treatments:no fertilizer(CK),single urea application(U),single organic fertilizer application(M),and urea combined with organic fertilizer(U+M)were set up to explore the dynamic process of nitrogen mineralization in different soil types.And the first-order kinetic equation fitting and correlation analysis were carried out on the soil accumulative mineralized nitrogen.The results showed that fertilization treatments and soil type significantly affected soil ammonium nitrogen,nitrate nitrogen,and accumulative mineralized nitrogen contents.And there were significant interactions between fertilization and soil type.The orders of accumulative mineralized nitrogen content and mineralization rate of different soil types were Lou soil,Loess soil,Yellow River irrigation soil,and Grey brown desert soil.Compared with CK treatment,different fertilization treatments significantly increased soil accumulative mineralized nitrogen,mineralization rate constant(k)and mineralization potential(No),and the differences among treatments were significant(P＜0.05).The accumulative mineralized nitrogen content and mineralization rate of single urea application and urea combined with organic fertilizer were 2.83～6.71 times and 3.83～7.70 times higher than that of CK treatment,respectively.Correlation analysis showed that soil accumulative mineralized nitrogen was significantly and positively correlated with soil organic matter and total nitrogen contents.The results illustrated that combined application of organic and inorganic fertilizers could significantly promote nitrogen mineralization in different soil types in Northwest China,improve nitrogen availability and supply capacity,and help maintain soil mineral nitrogen content,which played an important role in the efficient utilization of farmland nitrogen.
段晨骁;李佳蓓;吴淑芳;冯浩
西北农林科技大学旱区农业水土工程教育部重点实验室,陕西杨凌 712100||西北农林科技大学水利与建筑工程学院,陕西杨凌 712100西北农林科技大学旱区农业水土工程教育部重点实验室,陕西杨凌 712100||中国科学院水利部水土保持研究所,陕西杨凌 712100
农业科学
有机无机肥配施土壤类型氮素矿化累积矿化量西北地区
combined application of organic and inorganic fertilizerssoil typenitrogen mineralizationaccumulative mineralized nitrogenNorthwest China
《农业机械学报》 2024 (005)
344-355 / 12
国家重点研发计划项目(2021YFD1900700)
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