基于能值分析的农业生态系统可持续发展分析——以川南地区自贡市典型县域水稻生产系统为例

Energy Analysis-Based Evaluation of Sustainable Development of the Agro-ecosystem——Taking Typical County-Level Regions in Zigong City as an Example

运用能值分析理论和方法,对2010年自贡市典型县域水稻生态系统能值结构进行研究,研究发现:自贡市典型县域水稻生产系统的环境负载率平均为7.42,其中荣县7.07,富顺10.32,沿滩8.39,说明自贡农业经济的发展程度高,整个农业系统的压力较大.研究认为实现该区域农业的可持续发展,需提高农业科技含量,实施配方施肥,减少农药的使用等措施,提高系统的经济运行效率.

The theory and methods of energy analysis is employed in this paper to study the energy structure of the rice production eco-system in typical county-level regions of Zigong city （2010）. The analysis shows that the environment load ratio （ELR） of the rice production system is 7.07 in Rongxian, 10.32 in Fushun and 8.39 in Yantan, averaging 7.42 in Zigong, which indicates that the agricultural economy is well developed in Zigong while the rice production system there, as a whole, bears great environmental pressure. In order to realize a sustainable development of agriculture, the study area should increase its content of agricultural science and technology, practice formula fertilization, reduce pesticide application and improve the economic operation efficiency of the agro-eeosystem.