土地利用方式对宁夏平原土壤氮素含量及其硝化作用的影响  

Effects of Soil Nitrogen Content and Its Nitrification Under Different Land Utilization Patterns in Ningxia Plain

作　　者：李凤霞[1] 王长军[1] 刘丽丹[2] 谭松伟 倪翠襄 LI Fengxia;WANG Zhangjun;LIU Lidan;TAN Songwei;NI Cuixiang(Agricultural Resource and Environment Institute of Ningxia Academy of Agriculture and Forestry Science,Yinchuan 750002,China;School of Agriculture,Ningxia University,Yinchuan 750021,China)

机构地区：[1]宁夏农林科学院农业资源与环境研究所,宁夏银川750002 [2]宁夏大学农学院,宁夏银川750021

出　　处：《河南农业科学》2019年第2期77-82,共6页Journal of Henan Agricultural Sciences

基　　金：国家自然科学基金项目(41661066;40961020);宁夏农林科学院科技创新先导资金项目(NKYJ-16-03;NKYJ-18-18)

摘　　要：为了探讨土地利用方式对宁夏平原土壤不同形态氮素含量及其转化作用的影响,对蔬菜地、葡萄地、枸杞地、玉米地、水稻地、小麦地6种土地利用方式下土壤铵态氮、硝态氮、有机氮、无机氮含量及硝化潜势和硝化活性进行比较。结果表明:0～20 cm土层,蔬菜地土壤硝态氮、铵态氮和无机氮含量均高于葡萄地、枸杞地、玉米地、水稻地、小麦地,土壤硝态氮含量大小依次排序为蔬菜地>玉米地>枸杞地>水稻地>葡萄地>小麦地,蔬菜地土壤铵态氮含量是其他土地利用方式的1.2～1.6倍,土壤无机氮含量大小依次排序为蔬菜地>玉米地>枸杞地>水稻地>葡萄地>小麦地,水稻地土壤有机氮含量高于其他5种土地利用方式,蔬菜地土壤硝化潜势和硝化活性高于其他5种土地利用方式。20～40 cm土层,土壤硝态氮、铵态氮、无机氮和有机氮含量均以葡萄地最高,小麦地土壤硝态氮、铵态氮、无机氮含量均低于其他5种土地利用方式,水稻地土壤硝化潜势显著高于其他5种土地利用方式。In order to investigate the effects of different land utilization patterns on forms of nitrogen and its transformation in Ningxia plain,the ammonium nitrogen,nitrate nitrogen,organic nitrogen,inorganic nitrogen contents,nitrification potential and nitrification activity in the soil of vegetable land,grape land,wolfberry land,maize land,rice land and wheat land were compared.The results showed that:In 0 -20 cm soil layer,the contents of nitrate nitrogen,ammonium nitrogen and inorganic nitrogen of vegetable land were higher than that of grape land,wolfberry land,maize land,rice land and wheat land,the order of nitrate nitrogen contents was vegetable land>maize land>wolfberry land>rice land>grape land>wheat land,the content of ammonium nitrogen in vegetable land was 1.2 -1.6 times than that in other patterns of land utilization,the order of inorganic nitrogen content was vegetable land>maize land>wolfberry land> rice land> grape land>wheat land, the content of organic nitrogen of rice land was higher than that of the other 5 patterns of land utilization.The nitrification potential and nitrification activity of vegetable land were higher than that of the other 5 patterns of land utilization.In 20-40 cm soil layer,the contents of nitrate nitrogen,ammonium nitrogen,inorganic nitrogen and organic nitrogen of grape land were higher than that of the other 5 patterns of land utilization.The nitrate nitrogen,ammonium nitrogen and inorganic nitrogen contents of wheat land were lower than that of the other 5 patterns of land utilization.The nitrification potential of rice land was significantly higher than that of the other 5 patterns of land utilization.

关 键 词：土壤氮素含量 硝化作用 土地利用方式 宁夏平原 

分 类 号：S154.2[农业科学—土壤学]