黄土丘陵区不同植被类型土壤养分效应研究——以安塞纸房沟流域为例  

Research on Effect of Different Types of Vegetation on Nutrient Changes in Loess Hilly Region——Taking Zhifanggou Watershed in Ansai as An Example

作　　者：阿守珍[1] 卜耀军[1] 温仲明[2] 焦峰[2] 杨勤科[2] 

机构地区：[1]榆林学院,陕西榆林719000 [2]中国科学院水利部水土保持研究所,陕西杨陵712100

出　　处：《西北林学院学报》2006年第6期58-62,共5页Journal of Northwest Forestry University

基　　金：中国科学院"西部之光"人才培养计划项目(B22012900);中国科学院知识创新工程项目(KZCX3-SW-421);国家自然科学基金项目(40301029)

摘　　要：分析了纸房沟流域不同植被类型的土壤养分效应，结果表明，不同类型植被的土壤有机质、全氮、水解氮、速效磷均向土壤表层富集，但对养分的影响不同，从剖面上看，0～20cm〉20～40cm〉40～60cm；从不同植被类型看（全磷除外），乔木〉灌丛〉草本。土壤全氮、水解氮与土壤有机质之间呈显著的线性关系，而土壤全磷与土壤有机质的线性关系不显著。植被恢复过程中，土壤全磷含量变化很小。Effects of soil nutrient in the watershed of Zhifanggou Gully were studied. The results showed that all components tested in the soils with different vegetations had a trend to concentrate in the soil surface,including soil organic matter, total and available nitrogen,and available phosphorus. Their influences on the soil nutrients however,were different. From the view of soil profile ,the contents of the components tesrted were in the order of 0-20 cm〉20-40 cm〉40-60 cm; from the view of vegetation types,the or- der was arbor〉 shrub community〉 herbaceous community, exept for the total phosphours. Organic matter and total and available nitrogen were ingood linear relationship,which was not significant between organic matter and total phosphorus. The content of total phosphorus varied little in the process of vegetation restoration.

关 键 词：黄土丘陵区 不同植被类型 养分效应 

分 类 号：S718.512.3[农业科学—林学]