阿勒泰地区草地生产力变化及对策

Change of grassland productivity and strategy in Aletai Prefecture, Xinjiang Province

通过遥感技术、地理信息技术和地面实地调查技术的结合运用,将阿勒泰的历史资料(1985年前草地类型图、草地等级图、放牧利用图)与2002年遥感影像资料、野外测产资料进行对比分析,确定了阿勒泰地区可利用草地系数、可食牧草系数、草地利用系数,建立了各季节牧场产量模型,计算出阿勒泰地区的产草量、理论载畜量、季节牧场载畜量和草地分级资料,对理论载畜量、临界载畜量和实际载畜量进行了对比分析,提供阿勒泰地区草地生产力变化的信息和相关对策。

Based on Remote Sensing and Geographic Information System and field survey, historic document (grassland classification map, grassland grade map, grazing map before 1985) was combined with 2002 MODIS data and field yield data in comparison analysis, the ratio of available grassland, edible forage, and grassland utilization, i.e. K1, K2, K3, were determined, forage yield model for each type of seasonal grassland was established, forage yield, theoretical stocking rate, seasonal grassland stocking rate and grassland grade for whole prefecture and each county were calculated, the comparison analysis of theoretic, threshold and practical stocking rate was conducted, the information of grassland productivity change and relevant strategy were provided.