关键词: 微气象, 土壤覆盖, 覆盖物, 下垫面, 覆盖地, 热效应, 空气层, 未覆盖, 覆盖膜, 土面增温剂

Abstract: The chemical mulch developed by our iustitite is able to reduce effectively the evaporation from soil surface and raise its temperature. We have made a series of experiments in the fields for many years, and it has been widely applied in farming. This paper presents the preliminary study on the theory of micrometeorology of mulching soil. Starting from the basic equation of soil thermal conduction, and taking the heat balance equation as the boundary condition, temperature of various soil layers can be determined according to solution of the soil thermal conduction equation. The results of the theoretical calculation show a reasonable agreement with the actural measurements in the surburbs of Beijing in 1973 and 1974."The dissolution formula of soil surface temperature" described in this paper, can be used to study quantitatively the effects of mulching on the structure and the component of heat balance as well as the influence of environmental factors on the thermal efficiency of mulching.