中山市种植业生态系统能值分析及优化发展研究

A Study of the Energy Value and Structural Optimization of the Planting Ecosystem in Zhongshan City

应用能值分析理论和方法,研究了中山市种植业生态系统的发展现状及存在问题。结果表明,种植业生态系统的购买能值、系统的能值投资率、能值利用密度和太阳能值转换率都明显小于世界发达国家,说明中山市种植业生态系统中资源利用不够充分;并且该生态系统能值投入中化肥所占比重过高,将对环境造成危害;系统优化的关键在于大幅度减少水稻和普通蔬菜的种植面积,加大对高能量等级现代科学技术的应用,才能使中山市种植业生态系统走上持续发展的轨道。

In light of the theory of energy analysis,the article has made an investigation into the development status quo and problems of the planting ecosystem in Zhongshan city on Pearl Delta.The result indices that some indices——purchased energy,energy investment ratio,energy utilization density and solarpower transformation ratio,are obviously lower than those of the developed countries.This shows that the energy resources of the planting ecosystem in Zhongshan city has not been fully utilized and that chemical fertilizer has covered too large a proportion of energy investment,which will do damage to the wholemize the planting area of rice and common vegetables and expand the application of the modern science and technology of highgrade energy,which is a path to the continuable development of the planting ecosystem in Zhongshan city.