分层利用型生态农业系统的结构与功能分析

本文对岱密庵村“分层利用型”生态农业模式农业生态系统的结构,能流、物流及效益进行了研究.根据当地实际,将复合生态系统分为上层、中层、下层和庭院四个亚系统.研究结果表明,上、中、下三个亚系统的能量产投比分别为1.513,1.2864,12.5696,下层亚系统是系统内食物、饲料的主要能量来源,中层亚系统是系统内经济收入的主要来源,上层亚系统是中、下、庭院各亚系统发展的生态环境保障,高效的庭院系统是联结上、中、下三系统的枢纽.“分层利用型”生态农业模式,是山区生态农业建设的初等形式.在我省山区生态农业建设中具有普遍的指导意义.

Analysis on Constructure and Function of Eco-agriculture System about Stratification Utilization

Constructure,energy flow,materials flow and benefits of eco-agriculture system about stratification utilization in Daimian village were researched.The compound eco-system was divided into four sub-system,they are upper layer,middle layer,lower layer and courtyard according to the local condition.The results show that the invest-reture ratio of energy in upper,middle,lower layer sub-system are 1.513,1.2864,12.5696;respectively.The lower layer sub-system was the main energy resource in food and feed for the system,the middle layer in economic incoming.The upper layer was the ecological environment ensure for the development of the middle,lower and courtyard sub-system.The courtyard with higher benefits was the key position to combine the upper,middle, lower sub-system.The eco-agriculture of stratification utilization was the primary type with a wide guiding action for developing eco-agriculture in mountain of Shandong province.