不同类型地膜覆盖和环境条件对蔬菜土壤温度的影响OA

This paper used non-covering mulch film as a control(CK),and selected common PE black plastic film and black biodegradation film to study their effects on soil temperature of vegetables under different environmental conditions,such as field,monomer greenhouse and multi-span greenhouse.The results showed that the warming effect of black biodegradation film was similar to that of common PE black plastic film,the average soil temperature with black biodegradable film and common PE black plastic film under field culture and monomer greenhouse was about 1℃higher than that of CK.Meanwhile,their warming effects in multi-span greenhouse was slightly poor.Under field culture condition,the soil temperature of common PE black plastic film changed greatly,with a rapid increase during the day and a decrease to a temperature similar to that of black biodegradable film at night;the soil temperature change of black biodegradation film was relatively small,the lowest temperature at night was about 2℃higher than that of common PE black plastic film in the weather with a large temperature difference between day and night.Therefore,under field culture condition,black biodegradable film had a better heat preservation effect at night than common PE black plastic film,and was more suitable to cover early spring crops in field culture,which could effectively inhibit weed growth.