为明确不同土地利用类型对土壤水分的影响，采用土钻法在2019年和2020年4—10月定期对晋西黄土区人工油松林地、荒草地、农地0—10 m土层的含水量进行了观测研究。结果表明：（1）人工油松林地0—10 m土层的蓄水量为1 281.13 mm，荒草地为1 712.85 mm，农地为1 804.77 mm。油松林地较荒草地和农地多消耗431.72，523.64 mm的水分，且多消耗的土壤水分主要来源于深层土壤。（2）3个土地利用类型0—10 m土层含水量的垂直变化可以划分为土壤水分剧烈变化层、弱变化层和稳定变化层，各层的含水量随时间的变化也不尽相同。（3）油松林根系的直接吸水深度为5.4 m，影响深度可达10 m土层以下，农作物的吸水深度为4.2 m，影响深度可达8 m土层以下。对研究区内地势平坦、交通便利的地方可种植农作物，促进当地农业经济建设；而针对油松林地土壤含水量低的现象，可采取适当水分管理措施降低林地耗水。
Soil water content in artificial Pinus tabulaeformis forestland, native grassland and farmland in the loess region of western Shanxi province were observe and studied to define the effects of different land use types on soil moisture. The water content in 0—10 m soil layer was measured by soil core method from April to October in 2019 and 2020. The results showed that: (1) The soil water storage of the 0—10 m soil profile in artificial P. tabulaeformis forestland was 1 281.13 mm, 1 712.85 mm in native grassland, and 1 804.77 mm in farmland. P. tabulaeformis forest land consumed 431.72 mm and 523.64 mm water more than wasteland and agricultural land, respectively, and the more consumed soil water mainly came from deep soil. (2) The vertical change of water content in 0—10 m soil layer of three land use types could be divided vertically into three layers, including severe-changing layer, weak changing layer and relatively stable layer, and the change of water content in each layer with time was also different. (3) The depth of root water absorption was 5.4 m for P. tabulaeformis, 4.2 m for crops. The influence of depth was 10 m for P. tabulaeformis, 8 m for crops. Crops could be planted on flat and accessible sites in the study area to promote the local agricultural economy. In view of the low soil water content in P. tabulaeformis forest land, appropriate water management measures could be used to reduce stand water depletion in P. tabulaeformis forestland.
施政乐, 张建军, 申明爽, 刘畅, 胡亚伟, 徐勤涛, 李阳.晋西黄土区不同土地利用类型对土壤水分的影响[J].水土保持学报,2021,35(6):190~197复制