格姆滩黑土滩人工草地土壤水分动态研究

Study on Soil Moisture Dynamics in Black Soil Beach Artificial Grassland of Gemutan

通过对青海草地早熟禾人工草地和“黑土滩”退化草地土壤水分动态的研究，结果表明：两样地0—20cm土层土壤含水量变化趋势均为先增高，后降低，人工草地7月下旬土壤含水量达到最高值，“黑土滩”退化草地8月下旬达到最高值；各个时期土壤平均含水量人工草地总体上高于“黑土滩”退化草地；各时期0－20cm土壤水分垂直变化，人工草地随土层深度的增加而减小，“黑土滩”退化草地总体上随土层深度的增加而增大。

Soil moisture dynamics in Black Soil Beach Artificial Grassland and ＂black soil beach＂ degraded grassland in Gemutan was studied. The results showed that soil moisture variety trends at 0 - 20cm soil layer in two plots increased firstly, then decreased. In of July, soil moisture of artificial grassland reahed the highest. In the last ten-day period of August, soil moisture of degraded grassland reached the highest. In different period, average soil moisture of artificial grassland was higher generally than that of degraded grassland. In each period, soil moisture at 0 -20cm was vertical change and with increasing of soil depth, soil moisture decreasing for artificial grassland, but soil moisture increasing generally for ＂black soil beach＂degraded grassland.