果树最大经济效益期研究——Ⅰ.指标确定,计算方法及程序设计

RESEARCHED ON THE OPTIMUM DATE OF ECONOMIC EFFICIENCY AND THE OPTIMUM DATE OF RENEW IN FRUIT TREE Ⅰ.BASIC programme used to calculation of the optimum date of economic efficiency and renew in fruit tree

本文针对果树生长发育规律,从经济效益角度出发,基于树龄的经济效益,资金利用率和土地生产率,对果树最佳更新期和最大经济效益期的分析进行指标确定,建立分析数学模型,编制BASIC程序,并对实例进行分析,以验证模型的正确性及程序的合理性。

In this paper, BASIC programme used to calculate the optimum date of econom- ic efficiency and tree renew were estabolished for fruit tree. This programme insisted of three parts: Calculating the economic results; investment utilization and soil productivity; sti-mulating relationships of the age of tree to production, the output mvalue, the net in- come, the average net income per year and the accumulating investment profit ratio, friend- ly human-computer surface.And also, samples analysis was made in apple tree.