元谋干热河谷不同土地利用类型下土壤水分特征及其主控因子  

Soil moistures and the dominating factors under different land use types of Yuanmou

作　　者：韩姣姣[1] 段旭[1] 赵洋毅[1] 熊好琴[1] 

机构地区：[1]西南林业大学,昆明650224

出　　处：《干旱区资源与环境》2018年第1期168-173,共6页Journal of Arid Land Resources and Environment

基　　金：国家自然科学基金项目(31560233);云南省教育厅重点项目(2015Z141);云南省高校优势特色重点学科(生态学)建设项目(05000511311)资助

摘　　要：为探明干热河谷不同土地利用类型下土壤水分及主控因子,运用SPSS多元回归分析和通径分析研究了云南省元谋县老城乡水土保持示范区银合欢林地、扭黄茅草地,坡耕地土壤水分特征及其主要影响因子。结果表明:林地、草地、坡耕地3种土地利用类型下,土壤各影响因子和土壤水分表现出较明显的表聚现象,并且各影响因子对土壤水分有不同程度的影响。叶面积指数通过自身强烈的直接作用和通过其他理化因子的间接作用影响林地土壤水分变化,是林地土壤水分主控因子;生物量通过自身强烈的直接作用和通过其他理化因子的间接作用使其在很大程度上决定着草地土壤水分,是草地土壤水分主控因子;坡耕地土壤水分主要受容重影响,因此容重是坡耕地土壤水分主控因子。By using the SPSS multiple regression analysis and path analysis,we studied the relationship between physical-chemical properties and soil moisture of forest land,grassland and farmland in the soil and water conservation demonstration area of Old City Town,Chuxiong,and Yuanmou,to prove the soil moisture and its dominating factors of different land use types.The results showed that the impact factors had obvious surface assembly with soil moisture.Various impact factors had different levels of impact on soil moisture.Leaf area index impacted the soil moisture variety of forest land through its strongly direct effect and indirect effect that related to other physical-chemical factors; it was the dominating factor influencing the soil moisture of forest land.Similarly,biomass largely determined the soil moisture of the grassland through its direct and indirect effect; it was the dominating factor influencing the soil moisture of grassland.Farmland soil moisture was mainly influenced by bulk density,so the bulk density was the dominating factor influencing the soil moisture of farmland.

关 键 词：土地利用类型 土壤水分 主控因子分析 

分 类 号：S152.7[农业科学—土壤学]