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本文叙述了筛选影响栓皮栎等造林成活因素数量化方法,利用Basic程序在Corona微型电子计算机上进行计算,得到最优回归方程。基准变量y为每亩地上栎树的穴数,影响基准变量的因素保留了x_1(土层厚度)、x_2(土壤受侵蚀程度)、x_4(草本植物盖度)。并对有显著影响的因素进行了分析。本文还探讨了土壤受侵蚀程度与土层厚度,以及土层厚度与每亩地栎树保存穴数两组一元线性回归方程,并计算了相关系数。这样,便科学地论证了在河北燕山东段的栓皮栎等的造林地选择条件,以及合理的播种造林密度问题。
This paper describes a quantitative method of influencing the survival factors of afforestation, such as Quercus variabilis, and calculates the optimal regression equation by using Basic program on a Corona microcomputer. The reference variable y is the number of points of oak trees per mu. The factors affecting the baseline variables are x_1 (soil thickness), x_2 (soil erosion) and x_4 (herb cover). And have a significant impact on the factors were analyzed. This paper also discussed the degree of soil erosion and soil thickness, and the two linear regression equations of soil thickness and the number of preserved oaks per acre. The correlation coefficient was calculated. In this way, we have scientifically demonstrated the choice of afforestation conditions, such as the Quercus variabilis, in the eastern section of Yanshan in Hebei Province, and the rational planting density.