植被恢复类型对土壤物理性质的影响研究  

Changes of Soil Physical Properties and Moisture among Different Vegetation Restoration Types

作　　者：杨越[1] 哈斯[1] 孙保平[2] 曹波[2] 赵岩[2] 张萍[1] 

机构地区：[1]北京师范大学资源学院,北京100875 [2]北京林业大学水土保持学院,北京100083

出　　处：《灌溉排水学报》2012年第1期15-18,共4页Journal of Irrigation and Drainage

基　　金："十二五"国家科技支撑计划课题(2012BAD16B02);中央高校基本科研业务费专项资金联合资助项目

摘　　要：应用空间代替时间的方法研究了盐池县天然草地、人工封育草地、撂荒地、退耕还草地、固定沙地5种不同植被恢复类型的土壤物理性质和水分变化。结果表明,灌草结合的人工封育草地、退耕还林地和固定沙地在降低土壤密度方面优于草本为主的天然草地和撂荒地。不同植被恢复类型的土壤孔隙度差异显著,根系垂直分布较好的植被对深层土壤有较好的改良作用。封育、退耕还林等人工植被恢复措施能够降低土壤密度,增加孔隙度,改善土壤结构和物理性状,但在改良土壤质地方面还需要时间的累积。不同植被恢复类型的土壤水分变化迥异,这与土壤密度、孔隙度和质地等物理性质以及植被类型和分布密切相关。The changes of soil physical properties and moisture during 5 different vegetation restoration types（natural grassland,enclosed grassland,abandoned land,land as returning farmland to grassland,fixed sandy land） were studied in Yanchi County where located in the ecotone of agriculture-animal husbandry of China,with the method substituting spatial sere for time course.The results showed that： enclosed grassland,returning farmland to forests land and fixed sandy land,which were the combination of shrub and herb,played a role in reducing soil bulk density better than natural grassland and abandoned land with mainly herb.There were significantly differences in soil porosity among different vegetation types,the type whose roots were better vertical distribution improved deep soil better.Fencing,returning farmland to forests and other artificial vegetation restoration measures could reduce soil bulk density,increase porosity,and improve soil structure and physical properties,but also need a long time to improve the soil texture.There were obviously differences in soil moisture among the different vegetation restoration types,which may be closely related to the bulk density and porosity and other physical properties of soil and vegetation distribution.

关 键 词：植被恢复 土壤物理性质 土壤水分 盐池县 

分 类 号：S152.4[农业科学—土壤学] S152.7[农业科学—农业基础科学]