Soil water depletion depth by planted vegetation on the Loess Plateau
Soil water depletion depth by planted vegetation on the Loess Plateau
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DOI：
10.1007/s11430-009-0087-y
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发表时间：
2009-06
期刊：
影响因子：
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通讯作者：
Zhiqiang Wang;Baoyuan Liu;Gang Liu;Yong‐xiang Zhang
中科院分区：
文献类型：
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作者：
Zhiqiang Wang;Baoyuan Liu;Gang Liu;Yong‐xiang Zhang
黄土高原地区植被蒸散量超过降水量，造成土壤水分严重流失，土壤剖面出现深层干层，严重影响土地的可持续利用。研究了黄土高原半干旱区人工草地、灌木林和人工林的水分亏缺深度。对5种植被类型的土壤水分进行了20 m以上深度的测定。植被类型为农作物、天然草地、七年生种植苜蓿（Medicago sativaL.），23年生人工栽培锦鸡儿（Caragana microphylla Lam.）灌木林和23年生油松林。通过比较人工苜蓿草、锦鸡儿灌丛和松林与农作物和天然草地的水分状况，确定了草地、锦鸡儿灌丛和松林对土壤水分的消耗深度和消耗量。苜蓿、锦鸡儿灌丛和松林的土壤水分亏缺深度分别为15.5、22.4和21.5m。
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 sativaL.), 23-year-old planted caragana (Caragana microphyllaLam.) shrub, and 23-year-old planted pine (Pinus tabulaeformisL) 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.