黄土高原土壤系统墒研究

A study on Entropy of Soil in Loess Plateau

通过对黄土高原土壤系统熵研究，发现土壤起始熵不仅可以反映土壤肥力高低，而且可以反映土壤的适种性；生产投入熵可用来确定投入化肥的能量转换效率以及估侧作物的最佳施肥量，并为化肥在不同肥力土壤上的合理分配提供依据。以土壤起始熵判断出黄土高原土壤肥力高低顺序是土＞黑垆土＞栗钙土＞灰钙土＞黄绵土。

It hs been found through studying soil entropy on the loess plateau thatsoil entropy can reflect not only high or low soil fertility but also soil s uitability forcrops.Productive input entrop can be used in determining the energy conversion efficien-cy of chemical fertilizer inputs,and estimating the maximum fertilization to crops and al-so provides the base for rational distribution of fertilizer to soils with different fertili-ties.Accordingly,soil original entropy can be used to justify the high or low fertility ofsoils on the loess plateau,which should be heilu soil>chestnut soil>sterozem soil>cul-tivated loessal soil.