红壤地区地形位置和利用方式对土壤物理性质的影响  

Effects of Landscape and Soil Utilization Styles on Red Soil Physical Properties

作　　者：柳云龙[1] 胡宏涛[1] 

机构地区：[1]浙江大学环境与资源学院

出　　处：《水土保持学报》2004年第1期22-26,共5页Journal of Soil and Water Conservation

基　　金：国家自然科学基金资助项目(批准号49671050)

摘　　要：对不同地形部位和不同利用方式下的低丘红壤进行了采样和分析,结果表明地形变化和利用方式对土壤的理化性质和水分特性有明显的影响。对受人为扰动较小的林地和茶园而言,随地形位置的降低,土壤粘粒含量降低,有机质含量、土壤水稳性团聚体数量、土壤通气性均明显增加,而对受人为耕作影响较大的旱地和桔园,其养分含量、土壤结构性质变化没有明显规律。红壤的持水和供水性质也受到影响,坡顶的持水量比坡中和坡底要大,同时由于毛管孔隙数量比例小,土壤难以保证连续快速的水分供应是红壤作物易旱的重要原因。Hilly red soil with various landscape position and soil utilization styles were sampled and analyzed, results shows that effects of landscape variation and soil utilization styles on soil properties and soil water characteristics were obvious. For natural woodland and tea land, with reduced topography altitude, soil clay content was decreased and soil organic matter, soil water-stable aggregates, soil aeration were increased. But variation of soil nutrient content and soil structure characteristic was not obvious for artificial dry land and orange land. Variation of soil properties with landscape and soil utilization styles affected soil water-retention and soil water-supply characteristic, amounts of soil water retention on top of slope was larger than that of middle or bottom of slope. Due to absence of enough capillary pores, it was difficult for red soil to supply continuously enough water for crop growth.

关 键 词：红壤地区 地形位置 利用方式 土壤物理性质 影响因素 

分 类 号：S152[农业科学—土壤学] S153[农业科学—农业基础科学]