Dynamic changes of vegetation in agriculture-animal husbandry ecotone on north foot of Yiushan Mountain with relation to climate change
阴山北麓农牧交错带植被变化及其对气候变化的响应

By using the 8 km NASA/GIMMS half-monthly composite NDVI data and climate data in 1982-2003, this paper studied the dynamic changes of the annual mean value and accumulation anomaly of NDVI on the north foot of Yinshan Mountain, as well as the time series relationships of annual mean NDVI with annual mean temperature and annual precipitation. The results indicated that the annual mean NDVI in 1982-2003 had an increasing trend, and the mean value after 1990 was obviously higher than ever before. The spatial change pattern of NDVI followed the sequence of animal husbandry area < agriculture-animal husbandry area < agricultural area. There was no clear relationship between NDVI and temperature, but a positive correlation was observed between NDVI and precipitation, suggesting that the vegetation growth in the study area was mainly depended on the amount of precipitation.