沈阳市五三乡菜区农业生态系统分析

Analysis of Agro-ecosystems of Vegetable Production Re- gion in Wusan Commune of Shenyang.

本文以沈阳市东陵区五三乡菜区农业生态系统为研究对象,在系统环境辨识基础上运用主成分分析和聚类分析两种多元统计方法对城效型菜区农业生态系统的结构进行分类、分析与评价。文章还对系统的初级生产力、次级生产力、能量投入产出、物质循环及经济效果等系统功能进行了分析,明确了该系统结构、功能的现状及存在的问题,并提出改善结构与提高功能的意见。

In this paper, agroecosystems of vegetable production region of Wusan Commune in Shenyang was classified, analyzed and evaluated with the met hods of principal component analysys and cluster analysis on the basis of the system environment recognition. Moreover, the functions of agro-ecosystem were thoroughly analyzed, which include the analyses of primary productivity, secondary productivity, energy budget, energy input structure, energy efficiency, material cycling and economic budget. Measures for changing system structure and improving system function are also proposed.