摘要
以准噶尔盆地西南缘克拉玛依新垦绿洲防护林(包括杨树林、沙枣林、榆树林、紫穗槐林和枸杞等)带内土壤为研究对象,测定其土壤理化性状。结果表明:不同防护林带内土壤表层的容重都低于土壤下层;新建林带后土壤肥力呈增加趋势,榆树林地土壤养分最高,沙枣和枸杞林地较低;不同建植林分的土壤盐分变化(增减)方式有差异;杨树林随着建成年限的增加,土壤中总盐含量明显降低。
Junggar basin is a representative of arid lands at northwestern China. The effect of the shelterbelt system on soil characteristics is evaluated in newly-cultivated oasis of Karamay in southwestern Junggar basin. The emphasis in this paper is to measure the soil physical and chemical properties and then probe the improvement effects of shelterbelt system on soil. The protection forests include Populus euphratica, Tamarix ramosissima, Populus boUeana, Lyeium barbarum, Ulmus pumila, Elaeagnus angustifolia and Amorpha fruticosa. And the soil physical and chemical properties evaluation includes soil bulk density, soil nutrient content and soil solute salt. The results indicate that the shelterbelts have a notable impact on physical and chemical characteristic of soil. They could improve the soil physical structure. The construction of shelterbelts enhanced the soil fertility to a certain degree. The soil fertility in Ulmus pumila was the highest while it was the lowest in Lycium barbarum and Elaeagnus angustifolia. Total salinity content of soil in Populus euphratica obviously is reduced, along with the ages of shelterbelts increased, which had suppressed occurrence of the soil salification.
出处
《干旱区地理》
CSCD
北大核心
2007年第3期420-425,共6页
Arid Land Geography
基金
国家支撑项目(2006BACOLA03.2006BAD26B09)资助
关键词
准噶尔盆地
新垦绿洲
防护林
土壤
理化性状
Junggar Basin
newly-cultivated oasis
protection forests
ecological field
physical and chemical properties
