科尔沁沙地东南缘3种固沙林土壤水分时空变化的比较  

Comparison of Spatial and Temporal Variation of Soil Moisture for Three Sand Fixation Forests in the Southeast Edge of Keerqin Sandy Land

作　　者：韩辉[1] 

机构地区：[1]辽宁省固沙造林研究所,阜新123000

出　　处：《东北林业大学学报》2015年第5期102-104,共3页Journal of Northeast Forestry University

基　　金：林业公益性行业科研专项(201004063)

摘　　要：以科尔沁沙地东南缘章古台地区的樟子松、油松、赤松等3种主要固沙林为研究对象,连续4 a实测了0~300 cm土层在主要生长季的土壤含水率。结果表明：不同类型固沙林土壤含水率的空间异质性明显,30 cm以上表层土壤含水率均比较高,深层土壤含水率均明显降低;赤松林地50~200 cm土层、油松林地150~300 cm土层、樟子松林地30~150 cm土层土壤含水率在生长季下降明显,而无木本植被的沙丘（对照）在0~300 cm土层的土壤含水率基本没有变化。We measured the soil moisture content in the 0-300 cm soil layer of three types of sand fixing vegetations, Pin~ syl- vestiris var. mongoliea, Pinus tabulaeformis and Pinus densiflora of Zhanggutai region in the southeast edge of Keerqin sandy landwere during the main growing season for four consecutive years. The soil moisture content in the 0-100 cm soil layer in all types of sand-fixation forests were higher than that in bare sand dunes （check） , and soil moisture content in 200-300 cm layer was significantly lower than that in the bare sand dunes. The spatial heterogeneity of soil moisture con- tent of different types of sand fixation forests was obvious, soil moisture content in 0-30 cm layer was higher, soil moisture content decreased in any other layers significantly, soil moisture content in Pinus densiflora forest land in 50-200 cm soil layer decreased obviously, soil moisture content in 150-300 cm soil layers in Pinus tabulaeformis decreased significantly, and soil moisture content in 30-150 cm soil layer in the Pinus sylvestiris var. mongoliea forests decreased significantly. The soil moisture content of bare sand dunes in the soil layer of 0-300 cm changed little.

关 键 词：土壤含水率 章古台 科尔沁沙地 赤松 油松 樟子松 

分 类 号：S715.5[农业科学—林学]