In order to cut off the extension of the desertification in Zoigê grasslands, it is urgent to carry out the study of grassland desertification control model. The effects of eco-blanket cover on soil environmental , plant community coverage and biomass were studied in the semi - fixed sandy land and the mobile sandy land of Zoigê grassland. The results showed that, one year later, the eco-blanket covering effectively improved plant community coverage and biomass. Compared to the treatment data, the increment in the mobile sandy land was higher than that in the semi-fixed sandy land,the plant community coverage and biomass treated with eco-blanket covering were 1.20 and 1.19 times respectively, while mobile sandy land was 4.74 and 2.83 times, respectively. The eco-blanket covering also decreased soil temperature, increased soil water content and the maximum water holding capacity in both sandy lands, and the soil electric conductivity was increased by 0.01 ms · cm-1 in both sandy lands. The soil bulk density of the cover and control in the semi-fixed sandy land was equal, while that of the cover was 0.02 g · cm-3 lower than control in the mobile sandy land. The effect of the eco-blanket covering in the recovery of mobile sandy land was better than that of semi-fixed sandy land in the early stage of covering. The influence of the eco-blanket covering in soil environment indicators was not significant, which may be due to the shorter test cycle.%为遏制若尔盖草原沙化进一步蔓延,急需开展草地沙化治理模式研究.试验选取若尔盖草原半固定沙地和流动沙地为研究对象,分析了生态毯覆盖对两种沙地类型土壤环境、植物群落盖度和生物量的影响.结果表明:生态毯覆盖1 a后,有效提高了沙地植物群落盖度和生物量,流动沙地中生态毯覆盖的群落盖度和生物量较对照处理的增量高于半固定沙地,半固定沙地生态毯覆盖的群落盖度和生物量分别是对照处理的1.20倍和1.19倍,而流动沙地则分别为对照的4.74倍和2.83倍;生态毯覆盖均降低了两种类型沙地的土壤温度,增加了土壤水分,提高了土壤最大持水量;生态毯覆盖对两种类型沙地土壤电导率的改善效果一致,均比对照高0.01 ms·cm-1;半固定沙地中生态毯覆盖和对照处理的土壤容重相同,流动沙地中生态毯覆盖的土壤容重较对照处理低0.02 g·cm-3;生态毯覆盖初期对流动沙地的恢复效果优于半固定沙地.生态毯覆盖对土壤环境指标的影响均未达到显著水平,可能是由于试验年限较短所致.
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