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耕地是重要的农业生产资料。研究耕地的产出潜力,指导中低产田改造实践,对于有效地解决人地矛盾,合理制定农业及国民经济发展战略和政策,具有积极的作用和较深远的意义。本文利用耕地理化性状因子数量化逐步回归模型,推导出耕地总产出量的计算方法;并在分析各主导因子可改造性的基础上,以主导因子最佳组合类型为基本方向,确定各因子不同级(或类)别的改造目标,再利用推导式计算改造前、后耕地的总产出量,从而估测出耕地的产出潜力。
Cultivated land is an important means of agricultural production. Studying the output potential of cultivated land and guiding the reform of low and middle-yielding fields will have a positive and far-reaching significance for effectively resolving the contradiction between man and land and rationally formulating strategies and policies for the development of agriculture and the national economy. In this paper, we use the stepwise regression model to quantify the cultivated land physical and chemical properties, and deduce the calculation method of the total output of cultivated land. Based on the analysis of the adaptability of each dominant factor and the optimal combination types of the dominant factors as the basic directions, Different levels (or classes) of other transformation goals, and then use the derivation to calculate the total output of cultivated land before and after transformation so as to estimate the output potential of cultivated land.