在统计力学中,熵是混乱度的度量。它一方面与土壤信息出现概率有关,一方面和土壤热力学系统中的自由能有关。土壤信息在约定前提下出现概率可反映土壤整体肥力水平,土壤热力学熵则更直接地反映了土壤系统的作功能力,是高度综合的土壤肥力指标。土壤系统耗散结构从热力学机率大的状态过渡到机率小的状态,是一个不断输入能量和获得信息的过程,为土壤肥力研究另辟蹊径。 In statistical mechanics, entropy is a measure of chaos. On the one hand, it is related to the probability of appearance of soil information and, on the other hand, to the free energy in the soil thermodynamic system. Soil information under the premise of the probability of occurrence can reflect the overall level of soil fertility, soil thermodynamic entropy is more direct reflection of the soil system work capacity, is a highly integrated index of soil fertility. The transition of the dissipative structure of the soil system from a state of great thermodynamic probability to a state of low probability is a process of continuously inputting energy and obtaining information, and provides a new approach for the study of soil fertility.