农田覆盖是控制田间热状况的一种有效途径,除了传统的农田覆盖措施外,农田化学覆盖物已在国内外广泛应用,我国研制的农田化学覆盖物,如土面增温剂,水温上升剂,叶面保墒剂,保墒增温剂等,目前已在棉花、水稻、甘薯、蔬菜、果木栽培上得到比较广泛的应用。

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.