几种侵蚀红壤有机无机复合状况及其与土壤养分的关系  

ORGANO-MINERAL COMPLEXING AND SOIL NUTRIENTS IN SEVERAL ERODED ULTISOLS

作　　者：王春燕[1] 黄丽[1] 谭文峰[1] 蔡崇法[1] 胡红青[1] 

机构地区：[1]华中农业大学农业部亚热带农业资源与环境重点实验室,武汉430070

出　　处：《土壤学报》2008年第3期510-517,共8页Acta Pedologica Sinica

基　　金：国家"十一五"科技支撑计划项目(No.2006BAD05B09);湖北省自然科学基金项目(No.2005ABA139)资助

摘　　要：用傅积平改进法测定了亚热带3种(轻度、中度和严重)侵蚀红壤的有机无机复合状况,并分析了其与土壤养分的关系。试验得出:随着红壤由轻度、中度到严重侵蚀的变化,土壤养分(有机质、全氮和全磷)含量逐渐减小;供试红壤腐殖质的结合形态主要以紧结合态和松结合态为主,稳结合态腐殖质含量最少;随着红壤侵蚀程度的增强,结合态腐殖质含量和有机无机复合量均减少,土壤有机无机复合度变化不明显。土壤复合量与结合态腐殖质、团聚体水稳性呈极显著正相关,有机无机复合度与它们也正相关。红壤的养分因子中,全氮、全磷和有机质与土壤结合态腐殖质的相关性较好,而全钾和阳离子交换量与土壤结合态腐殖质的相关性不大。3种结合态腐殖质中,紧结合态与红壤养分(全氮、全磷和有机质)的相关性最高。Soil samples were collected of eroded Ultisols, varying in extent of erosion （slight, medium and severe）, in the subtropical China. Organo-mineral complexing status of the samples was determined with the method modified by Fu Jiping and its relationship with soil nutrients was analyzed. Results show that with the extent of erosion rising from slight, medium to severe, the content of soil nutrients （OM, total N and total P） decreased gradually. Tightly-combined and loosly-combined humus dominated in the soils, and the content of stably-combined was the least. With erosion of the soil getting serious, both the contents of combined humus and organo-mineral complexes reduced, but the organo-mineral complexing degree of the soil did not change much. The content of soil complexes was positively related to combined humus and water-stable aggregates, so was the organomineral complexing degree. The contents of total N, total P and OM were closely related to combined humus, but the contents of total K and CEC were not. Among the three types of humus, tightly-combined humus was the most closely related to soil nutrients （total N, total P and organic matter）.

关 键 词：侵蚀红壤 有机无机复合 结合态腐殖质 土壤养分 团聚体 

分 类 号：S158[农业科学—土壤学]