主要农用黄绵土典型剖面养分分布特征及历史演变  

Characteristics of Nutrient Distribution and Historical Evolution on Typical Loessial Soil Profile

作　　者：摄晓燕[1] 谢永生[1] 王辉[1] 鞠艳[1] 

机构地区：[1]西北农林科技大学资源环境学院,中国科学院水利部水土保持研究所,陕西杨凌712100

出　　处：《水土保持学报》2010年第4期69-72,77,共5页Journal of Soil and Water Conservation

基　　金：国家科技支撑计划项目(2006BAD05B10,2006BAD09B10);中科院方向性项目(KSCX1-YW-N-15-04);中国科学院知识创新工程重大项目(KSCX-YW-09-07)

摘　　要：利用历史资料及典型剖面土样,采用原位采样及相同测定方法研究不同时期黄绵土剖面的养分分布特征及演变趋势。结果表明:近30年来黄绵土中有机质、氮素、磷素含量水平有不同程度提高,耕层变化量最大,耕层有机质、全氮、碱解氮、全磷和速效磷的增加量分别为2.18,0.12,3.53,0.32,5.18 mg/kg。剖面中钾素含量呈减少趋势,耕层变化量最小。黄绵土耕层各养分含量的表聚系数均增大,该区土壤肥力向有利于作物吸收的方向演变。The study based on historical data and soil sample of typical loessial soil profile in different years.In order to know the characteristics of nutrient distribution and historical evolution on typical loessial soil profile,soil nutrients condition and its temporal variation for recent 30 years were studied through the situ sampling method and the sane determination method as historical period.The result showed that the content of nitrogen and phosphorus has been improved for recent 30 a.The nutrient accumulation of soil organic matter（OM）,total nitrogen（TN）,available nitrogen（AN）,total phosphorus（TP） and available phosphorus（AP） increased significantly in topsoil.The content respectively increased 2.18,0.12,3.53,0.32,5.18 mg/kg.There is a decreasing tendency in potassium content.The ration of soil nutrients content is greater of topsoil in 2008.It seemed that the fertility of loessial soil is propitious to absorption for plants.

关 键 词：黄绵土 剖面 养分分布 肥力演变 

分 类 号：S158.2[农业科学—土壤学]