基于RS的宁夏天然草原生产力监测与评价

Monitoring and Evaluation of Natural Grassland Productivity in Ningxia Based on RS

利用MODIS卫星数据和地面调查数据,分区构建天然草原生产力估算模型,测算宁夏天然草原生产力并进行草原级划分。结果表明,用指数模型估算宁夏地区温性草甸草原类的地上生物量(产草量鲜重)具有可行性;宁夏草原级以六级和七级草原为主,其面积占比达80.55%,一级至五级草原仅占15.9%,八级草原占3.55%。

Using MODIS satellite data and ground survey data,a natural grassland productivity estimation model was constructed in different regions to calculate the natural grassland productivity in Ningxia and classify the grassland quality.The results indicate that using an index model to estimate the above ground biomass(grass yield and fresh weight)of grassland species in Ningxia region is feasible.The grassland in Ningxia is mainly composed of sixth and seventh level grasslands,with a pixel count of 80.55%.The first to fifth level grasslands only account for 15.9%,and the eighth level grasslands account for 3.55%.