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从土壤的定义和本质特征进行分析,认为土壤肥力必须以生长植物的能力为核心,因而提出其定义为:在一般条件下,土壤使植物形成生长量的能力:这一定义不同于现行的三种定义,既包含有未知因素和协调程度,又有利于土壤肥力数量化分级制的建立,并可适用于肥力的动态观测和比较.土壤肥力分级的基本公式:直接分级Y=KX全年产量t/hm2.(K=1),间接分级Y=a+bx限制因子.
Based on the analysis of the definition and essential characteristics of soils, we think that the soil fertility must be centered on the ability of plants to grow. Therefore, it is defined as the ability of soils to grow plants under normal conditions. This definition is different from the current three The definition of species contains not only the unknown factors and the degree of coordination but also the establishment of quantitative grading system of soil fertility, which can be applied to the dynamic observation and comparison of fertility. Soil fertility classification of the basic formula: Direct grading Y = KX annual output t / hm2. (K = 1), indirectly grading Y = a + bx limiting factor.