黄土高原南部刺槐林地的土壤水分变化规律研究

Study on Variation of Soil Moisture of Black Locust in Southern Loess Plateau

通过对泥河沟流域刺槐林地土壤水分2 a的监测资料分析发现,在干旱年份,土壤含水量在114.3-133.2 g.kg-1范围内,平均为124.6 g.kg-1,相当于田间持水量的50%以上,大大高于凋萎湿度,土壤水分条件基本可以满足林木的正常生长。因此,对于小流域的综合治理,刺槐是较为理想的树种;而且秋季土壤水分(129.0 g.kg-1)高于春季(122.8 g.kg-1),更利于造林成活率的提高。

Based on the analysis of soil moisture of black locust forest in Nihegou watershed in two years, we discovered the soil moisture was in the range of 114.3- 133.2 g · kg^-1, and the average value was 124.6g · kg^-1 , which was equivalent to 50% field moisture capacity , so the soil moisture was satisfied for the normal growth of the forest in drought year. Therefore, black locust is the better choice for the small watershed comprehensive control; the soil moisture in autumn（ 129.0 g · kg^-1 ） is higher than in spring（ 122.8g · kg^-1 ）, so in autumn is favorable for the hight survival rate of afforestation.