Soil water depletion depth by planted vegetation on the Loess Plateau

被引:0
|
作者
WANG ZhiQiang
机构
基金
中国国家自然科学基金;
关键词
Loess Plateau; planted alfalfa grass; planted caragana shrub; planted pine forest; soil moisture; dry soil layer;
D O I
暂无
中图分类号
S152.7 [土壤水分];
学科分类号
0903 ; 090301 ;
摘要
Evapotranspiration of much planted vegetation exceeds precipitation, and this can deplete soil water and cause a deep dry layer in the soil profile, which is a serious obstacle to sustainable land use on the Loess Plateau, China. This study aimed to determine water depletion depth of planted grassland, shrub, and forest in a semiarid area on the Loess Plateau. Soil moisture of five vegetation types was measured to >20 m in depth. The vegetation types were crop, natural grasse, seven-year-old planted alfalfa (Medicago sativa L.), 23-year-old planted caragana (Caragana microphylla Lam.) shrub, and 23-year-old planted pine (Pinus tabulaeformis L) forest land. Through comparing moisture of planted alfalfa grass, caragana shrub, and pine forest to crop and natural grassland, the depth and amount of soil water consumed by grassland, caragana brush and pine forest was determined. The depth of soil water depleted by alfalfa, caragana brush, and pine forest reached 15.5, 22.4 and 21.5 m, respectively.
引用
收藏
页码:835 / 842
页数:8
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