广东三水市种植业系统的能值分析及其可持续发展

应用生态系统能值分析理论方法,定量分析广东省三水市种植业系统的物流和能流。结果表明:1997 年三水市种植业系统的经济投入明显高于广东省平均水平,与一些发达国家相近。其中人力和化肥投入分别占经济投入的45.6% 和22.8% ,这与充分利用耕地(复种指数达307% )和多样化种养模式(基塘系统占总耕地30% )是分不开的。今后应加强物质能量多级利用,提高资源利用效率,扩大有机肥源、减少化肥的投入,走持续发展的农业道路。

Emergy Analysis and the Sustainable Development of Farming System in Sanshui of Guandong

The material and energy flow of Sanshui farming system was studied through the Emergy Analysis. It is shown that in 1997, the economic input in Sanshui was higher than that in Guangdong Province, but close to some developed countries. The manpower and chemical fertilizer are the major parts among the economic input, which takes 45.6% and 22.8% seperately, owing to the high utilization ratio of land (the multiple crop area was 307%) and multiplantingraise model( the dikepond system was 30% in total cultivated area). It is recomment that the material and energy be multiplestage used, increase the using efficiency of resources and the quantity of manure, but reduce the application of chemical fertilizer, and develop the sustainable agriculture in Sanshui City.