耗散结构理论在土壤科学上应用途径的探索

Approach to Application of Dissipative Structure to Soil Science

本文根据耗散结构的基本理论，结合生产实践经验，提出了表征土壤肥力的非线性微分方程：＝（Ｋ－ｂ）ｘ－βｘ２Ｘ─土壤生物活性，ｔ─时间，Ｋ─生物繁殖系数，ｂ─生物死亡系数，β─生物饱和系数．解这个并不复杂的非线性微分方程，便可知道土壤是处于热力学分枝，还是耗散结构分枝．这对研究土壤肥力的动态变化、土壤肥力的分类、土壤的管理、土壤退化的防止等方面有着无法预测的应用前景．

According to the basic theory of dissipative strcture and Productive experience,the nonlinear differential equation that can indicate the soil fertility is suggested:= (K-b)x-βx2, x-biological activity of soil,t-time,K-coefficient of biological propagntion, b-coefficient of biological death,β-coefficient of biological saturation.The equation is solved and it is known that soil is located at the branch of the thermodynamies or of the dissipative structure,which possesses tempting and unforecasting application prospects for investigating the kinetic change in soil fertility, classifying fertility, improving soil fertility,and preventing soil fertility degeneration.