日喀则市农业生态足迹研究

Study on Agricultural Ecological Footprint for Shigatse City

采用水资源足迹和化石能源供给地概念,对日喀则市2005年农业活动的生态足迹进行实证分析.结果表明:日喀则市农业综合足迹为334 153.27 hm2,占日喀则市总足迹的77.6%,其中,化石能源地足迹仅占农业综合足迹的13.3%,表明农业现代化程度不高.对农业综合足迹贡献最大的是耕地和牧草地,二者合占65.6%,主要原因是大量使用农用化学品和牧草地严重超载;生产足迹占农业综合足迹的82.8%,说明农村占用的大部分资源主要用来进行资源再生产.对日喀则市农业综合足迹的实证研究表明,资源产量法可以有效减小土地面积法引起的生态赤字扩大化现象,将肉、蛋、奶产品作为次级产品更能反映牧草地利用现状.

The concepts of water resource footprint and fossil energy supplying areas were adopted to calculate the agricultural footprint of Shigatse City in 2005. It indicates that the agricultural footprint is 334 153.27 hm^2 , accounting for 77.6% of the total ecological footprint in the city. Among them, the fossil fuel footprint is only 13.3 % . This shows the low level of agricultural modernization. Arable land and grazing land are the largest two contributors of agricultural footprint, accounting for 65.6 % of the total. This is due to the use of mass agrochemicals and serious overloading. The farmelC agricultural producing footprint accounts for 82.8 % of the total agricultural footprint, indicating that the most resources are used for resource-reproducing in the countryside. It also indicates that Resource Yield method could effectively reduce the expansion of ecological deficit which results from Land Area method, and better reflect the grazing land use status if taking livestock products as secondary products.