西峡县土地利用最优结构模式的初步研究

A PRELIMINARY STUDY ON THE LAND USE OPTIMIZATION MODEIS IN XIXIA COUNTY

本文遵循生态-经济系统的观点,根据西峡县各类农业用地的自然、经济特点,确定了9个决策变量及其价值系数以及12个约束条件,建立了该县土地利用最优结构的总体模式和子模式,给出1990年的农业目标产值及其实现的战略措施。文中论述县级土地利用优化模式建立的原则和方法,阐明优化模式方法是研究土地利用系统较为有效的定量综合方法。

On the basis of analysing the state of the landuse in Xixia county in 1985, in this paper. We applied the method of optimization models, and developed the land use optimazation model, including 9 decision variables and their coefficients and 12 constrants, for the whole county, and further, three sub-models representing hilly areas, near mountainous areas and remote mountainous areas respectively, and pointed out the goals set for agricultural output value in 1990 and their strategic measures to achieve. The computed results of the models have shown that the agricultural structure of Xixia county in 1990 will change greatly in that values of the forestry-antmal husbandry-fishery will exceed that of the crop, the land resources in this county will be more rationally used.In this paper, we expounded the principle and methods developing land use optimization models in mountainous countyes, and suggested that optimization model be a comprehensive and quantitative approach to rationally planning land resources. Using this method, we can make quantitative synthesis on the basis of analysis, and express in its concise mathematical models the complex systems of land use, and analog the behaviour of the systems in modern computer techeniques, and seek the optimum project on the conditions of restraints and objective function optimization, and thus make the goal of both economic and ecologic benefits optimized.