黄河源区不同黑土滩人工草地土壤水分动态研究

对青海草地早熟禾人工草地、垂穗披碱草人工草地、中度退化草地及黑土滩退化草地土壤水分动态进行了研究,结果表明:各样地0~20cm土层土壤含水量变化趋势均为先增高,后降低,各个时期各层及平均含水量总体上为中度退化草地﹥青海草地早熟禾人工草地﹥黑土滩退化草地﹥垂穗披碱草人工草地;各时期0~20cm土壤水分垂直变化,总体上人工草地和中度退化草地随土层深度的增加而减小,黑土滩退化草地随土层深度的增加而增大。

Study on Soil Moisture Dynamics of Black Soil Beach Artificial Grassland in Yellow River Headwater Area

Dynamics of soil moisture on Poa pratensis cv. Qinghai artificial grassland, Elymus Nutance artificial grassland, moderately degraded grassland and black soil beach degraded grassland were studied in Yellow River headwater area. The results showed that soil moisture variety trends at 0 - 20cm soil layer in different plots increased firstly, then decreased. In different period, average soil moisture at 0 ~ 20cm showed that moderately degraded grassland 〉 Poa pratensis cv. Qinghai artificial grassland 〉 black soil beach degraded grassland 〉 Elymus Nutance artificial grassland. In each period, soil moisture at 0 ~ 20cm change as verticality decreased with increasing of soil depth at Poa pratensis cv. Qinghai artificial grassland, Elymus Nutance artificial grassland, moderately degraded grassland, but soil moisture also increasing generally for black soil beach degraded grassland.