延安试区土壤干层现状分析  

Status of Dried Soil Layer in the Yanan Experimental Area

作　　者：王力[1] 邵明安[1] 侯庆春[1] 

机构地区：[1]中国科学院水利部水土保持研究所,陕西杨陵712100

出　　处：《水土保持通报》2000年第3期35-37,共3页Bulletin of Soil and Water Conservation

基　　金：国家自然科学基金 !( 4 98710 3 9);中科院资源与生态环境重大项目! ( KZ95 1-B1-2 11)

摘　　要：近年来 ,以林草地地力衰退为特征的人工林草地土壤退化日趋严重 ,其中以土壤水分严重亏缺为特征的土壤干化现象愈益引起了人们的重视。土壤干化的直接后果是形成土壤干层 ,导致土壤退化 ,植物生长速率减缓 ,群落衰败以至大片死亡 ,严重地威胁到中国中北方地区特别是黄土高原地区生态环境的建设。因此 ,研究和解决土壤干层问题已成为黄土高原植被建设的迫切任务。根据现有土壤水分资料 ,初步分析了延安试区植被下的土壤干层现状 ,对不同林草植被下的干层状况做了比较 。In recent years, the soil deterioration whose characteristic is the land degeneration of the artificial forestry and grass lands is being worse and worse. And soil desiccation whose characteristic is critical deficit of soil moisture continuously is taken seriously. Soil desiccation can form dried soil layer, result in soil deterioration, slow down the velocity of vegetation growth, cause community declination and death, and imperil seriously ecological environmental construction in the north area of China, especially in the loess plateau. So, studying and solving dried soil layer have become the urgent task for the vegetation construction in the loess plateau. According to the soil moisture data of Yanan experimental area, dried soil layer of vegetation is analyzed preliminarily, the statuses of dried soil layers between the different forestry and grass plantation are compared, and the meaning of solving dried soil layer is put forward.

关 键 词：延安地区 人工植被 土壤干层 

分 类 号：S152.7[农业科学—土壤学]