【摘要】 本文对地膜覆盖后土壤能量平衡的变化特点进行了理论分析,并通过观测资料阐述了地膜覆盖的增温机制。结果指出:地膜对土壤潜热交换的消除、显热交换的减弱和夜间有效发射辐射的抑制是导致膜下土壤温度升高的主要原因。更多还原

【Abstract】 Having been analyzed the energy balance under transparent polyethylene mulch and experiment data, the mechanism of soil temperature increase is discussed. It shows that the elimination of latent heat exchange, the weakening of sensible heat exchange and the reducing of the effective long wave radiation during night are the main reasons for the temperature of mulched soil getting higher.更多还原