董徐生态村农业生态系统能量流计算和生态效应分析

Calculation of Energy Flow and Analysis of Ecological Benefit in the Agro-Ecosystem of Dongxu Village, Jiangsu Province

董徐村农业生态系统分为三个子系统,生产者、消费者和分解者。本文主要计算生物生产过程中的能量流动,建立了计算方法。结果表明,该系统的生态结构趋向合理,全系统能量投入产出比近年有了改善,变消费型系统为生产型系统。通过能量流的计算和生产效应分析,结果表明,该系统在发展经济的同时注意生态环境建设,基本做到同步协调发展。

The agro-ecosystem of Dongxu Village is devided into three subsystems: producer, consumer and decomposer. The authors set up a calculating method, by which energy flow in the procedd of biological production was calculated. It was showed that the ecological structure in the system was getting access to rationalization. The ratio of energy input-output was improved in recent years, that the system was changed consumptive type into productive type. By calculation of energy flow and benefit analysis, the results show that the system has coordinated economic development and eco-environmental construction simutano-ously.