Abstract: In the article, on the basis of the data of soil timperature measured inside and outside of the plastic greenhouse, calculations were made inside and outside the greenhouse, about the daily change of average vertical soil heat fluxes, the sums of positive, negative and whole day soil heat fluxes as well as the daily change of average soil temperatures. In addition, the daily change of average horizontal and vertical gradients of soil temperature in the greenhouse were calculated. And comparision was made about the differences of the daily change between the closed and opened greenhouses.

Key words: Plastic greenhouse Soil temperature Soil heat flux, Plastic greenhouse Soil temperature Soil heat flux