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土壤干旱、瘠薄,是华北石质低山地区影响造林成活及幼林生长的主要因子。截存地表径?流、减少土壤蒸发,是提高山地土壤水分的重要途径。为了探讨土壤保墒措施,从1975年雨季开始,我们进行了复盖试验。经过一年多的观测,可以初步肯定;对造林地用复草被或复石的方法,能够降低地温,减少土壤蒸发,并能提高造林成活率。所以复盖是今后山地造林(尤其是干旱阳坡)值得提倡的一种方法。
Soil arid and infertile soil is the main factor that affects the survival of afforestation and the growth of young forests in the stony and hilly area of northern China. Cut off surface diameter flow, reduce soil evaporation, is to improve the mountain soil moisture an important way. In order to investigate soil moisture conservation measures, we conducted a cover experiment from the beginning of the rainy season in 1975. After more than a year of observation, it can be tentatively affirmed; for afforestation with compound grass or compound stone method, can reduce the ground temperature, reduce soil evaporation, and can improve the survival rate of afforestation. Therefore, covering is the future of afforestation (especially the dry sunny slope) is worth promoting a method.