干旱地区盐渍土系统的熵污染及其调控对策

本文从系统土壤学的角度,探讨了河西干旱地区耕地次生盐渍化的主要成因,根据非平衡态热力学理论,研究了盐渍土系统的熵变过程,提出了熵污染机制。 作为盐渍土熵污染的定量分析,主要是研究土壤盐分对作物的危害作用。文中运用主导因素权重分析法、逐步回归分析法以及土壤盐类集与作物指标集之间的典型相关分析法,从不同层次上进行计算与分析,并根据定性与定量分析结果,提出了干旱区盐渍土整治和优化利用对策。

KNTROPY POLLUTION AND CONTROLLING STRATEGY OF SALINE SOIL SYSTEM IN THE ARID ZONE

The paper, from the point of systermatic pedology, discusses the maincauses of secordary ralinity on cultivated soils in the arid area of He Xi region.It also makes a study according to the non-equilibrium thermodynamics onthe developmental processes of entropy in the saline system. The quantitative analysis of entropy pollution is a study on the detri-mental effects of soil salt on crops. The paper calculates and analyses,by us-ing different methords the problem of entropy pollution on different levels,and at the same time,the paper, on the basis of qualitative and quantitativeanalysis results,puts forward the strategies on how to harness and utilize thesalinized soil in arid areas.