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以地处半干旱坝上高原沽源县为例,对比分析不同自然区域内林地、草地距地表约25cm处土壤含水量。结果表明:人工乔木林地土壤含水量最少,灌木林地次之,草地最多,尤其是天然草地。结合当地农户走访和野外踏查,得出结论:草地或灌木林地能够较好地保持土壤水分,乔木林地则相对较差。建议遵循当地自然地带性规律,充分考虑水分条件,林草植被建设以生态耗水量少的草、灌为主,乔木为辅。
Taking Guyuan County, a plateaus located on the semi-arid dam, as an example, the soil moisture content of forest land and grassland about 25cm above the surface in different natural areas was analyzed. The results showed that artificial arbor forest had the least soil water content, followed by shrub land and grassland, especially natural grassland. Combined with local farmers to visit and field investigation, concluded: grass or shrub land to better maintain soil moisture, arbor forest is relatively poor. Proposed to follow the laws of the natural zone with the local and give full consideration to water conditions, grass and grass vegetation construction to ecological water consumption less grass, irrigation, tree supplemented.