Effects of different patterns surface mulching on ground temperature, humidity and soil moisture

Taking soil as testing object, the effects of different surface mulching patterns(clean tillage, plastic fi lm mulch, straw mulch, litter mulch and shrub mulch) on soil properties have been studied. The results showed that the fi ve surface mulching patterns all had infl uences on the soil properties under the condition of high temperature. With the patterns of clean tillage and plastic fi lm mulch, the ground temperature were raised and was the fastest-growing and the largest increase; with the patterns of straw mulch, litter mulch and shrub mulch, the ground temperature lowed down and the cooling effect of shrub cover was the best; the patterns of plastic fi lm mulch, straw mulch, litter mulch and shrub mulch all can improve the surface humidity, of them, the plastic fi lm mulch in the earlier stage had the best moisturizing effect, later was lower than clean cultivation; the soil moisture loss covered with plastic fi lm mulch had the least decrease in later stage and that of straw mulch and litter mulch were the next in turn, that of shrub mulch evaporated fastest and greatest.