以四子王旗荒漠草原牧户草场为研究对象,基于高空间分辨率卫星系列数据,监测2012~2022年草场植被覆盖时空变化,利用Pearson系数和偏相关系数分析降水和放牧方式对植被覆盖度影响。结果表明,研究区植被覆盖度在0.12~0.29内波动变化,呈现上升趋势;植被覆盖度时空变化与降水变化呈正相关,其中与7月有效降水频次相关性显著(p Using the pastures of nomadic households in the desert steppe of Siziwang Banner as the research object, based on high spatial resolution satellite series data, the temporal and spatial changes in pasture vegetation coverage from 2012 to 2022 were monitored. The effects of precipitation and grazing methods on vegetation coverage were analyzed using Pearson coefficients and partial correlation coefficients. The results showed that the vegetation coverage in the study area fluctuated within the range of 0.12 to 0.29, showing an upward trend. The temporal and spatial changes in vegetation coverage were positively correlated with precipitation changes, with a significant correlation (p < 0.05) with the frequency of effective precipitation in July. After the grazing method changed from free grazing in spring, autumn, and winter to rotational grazing throughout the year, the differences in vegetation coverage among the three enclosures in the grazing area gradually decreased. When the stocking rate increased, the overall trend of vegetation coverage in the pasture remained unchanged, indicating that the rotational grazing method had a positive effect on grassland coverage.
