【摘要】 采用“农业生态系统主要因子权重指数法”,对陇东—长武塬地区生态系统总体功能进行了评价。结果发现,该地区评价指数(0.571)低于经过强化治理的长武县王东沟和淳化县泥河沟两个小流域(>0.7)。进一步计算,排列出评价因子在今后治理与发展中的重轻急缓顺序依次为:耕地生产率、农业总产值、人均纯收入、水土流失治理度、基本农田率、人均肉食和人均粮食。从而确定了该类地区今后农业的发展方向为:调整土地利用结构,巩固并提高粮食生产水平,林果牧业等协调发展,建成多功能高效益的农业生态系统。更多还原

【Abstract】 In this paper. a method called "Index of Agro- ecological Factors" is used to assess agro- ecological system functions of Longdong Changwu Yuan area. The results show that the overall func- tion of system is fragile, and the index is 0.571. In Wangdonggou of Changwu county. a small catch- ment controlled by systematic soil conservation measures for years. the index is more than 0.7. The related factors were computed, analysed and sorted according to importance and urgency. The sorting order is cropland productivity--total agricultural output value-net income per person-soil conserva- tion rate-basic farmland proportion-meat and grain per person. Besed on the results, the main tasks will be concentrated on consolidating and increasing of grain production coordinating and devel- oping of forestry. fruit trees and livestock husbandry. consequentially. a mult-function and high effi- cient agro ecological system will be formed.更多还原