退耕还林区林草复合模式土壤养分动态  

The Dynamic of Soil Nutrient under Forest and Grass Composite Pattern in Area of Conversion of Farmland to Forests

作　　者：杨丁丁[1] 罗承德[1] 宫渊波[1] 梁剑[1] 

机构地区：[1]四川农业大学林学园艺学院

出　　处：《林业科学》2007年第A01期101-105,共5页Scientia Silvae Sinicae

基　　金：国家科技部"十五"重点课题(2001BA606A-06-1);四川省重点学科建设项目资助

摘　　要：This paper analyzed the difference of soil nutrient and the dynamics of available nutrient in soil solution of the forest and grass composite pattern and the farmlands on site.The result showed that the content of soil total N,hydrolysable N,organic matter in forest and grass composite pattern was higher than in farmland.The content of total P,available P,total K and slowly K was lower than that in farmland.The seasonal change of NH-4+-N,NO-3--N,PO-4 3-and K+ was influenced by the growing of plant,precipitation and temperature.This paper analyzed the difference of soil nutrient and the dynamics of available nutrient in soil solution of the forest and grass composite pattern and the farmlands on site. The result showed that the content of soil total N, hydrolysable N, organic matter in forest and grass composite pattern was higher than in farmland. The content of total P, available P, total K and slowly K was lower than that in farmland. The seasonal change of NH4^＋ -N,NO3^- -N,PO4^3- and K^＋ was influenced by the growing of plant, precipitation and temperature.

关 键 词：退耕还林 林草复合模式 平衡土壤溶液 养分动态 

分 类 号：S718.516[农业科学—林学]