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通过对枯落物覆盖下森林土壤蒸发的观测,研究了不同干重及类型的枯落物对土壤蒸发的影响,及其与含水率的关系。结果表明:土壤含水率相同,枯落物覆盖量越大,土壤蒸发量越小;不同类型的枯落物对土壤蒸发的抑制作用不同,在相同干重的枯落物覆盖下,未分解、半分解和分解的枯落物对土壤蒸发的抑制能力依次减弱。土壤蒸发量与枯落物质量呈对数关系。随土壤含水率的降低,土壤蒸发量减少,含水率在41%～38%时,每下降1%,75g、45g、15g枯落物覆盖下的土壤蒸发量依次减少2.38g、1.43g、1.30g,且在土壤含水率下降过程中,覆盖的枯落物分解程度越高,土壤蒸发速率降低越不显著。
Through the observation of forest soil evaporation under litter cover, the effects of different dry weight and types of litter on soil evaporation and its relationship with water cut were studied. The results showed that: the same soil moisture content, the larger the litter coverage, the smaller the amount of soil evaporation; different types of litter on the evaporation of soil is different, under the same dry weight of litter, undecomposed, Semi-decomposed and decomposed litter in turn decreased soil evaporation inhibitory capacity. Soil evaporation and litter quality showed a logarithmic relationship. With the decrease of soil water content, the soil evaporation decreased. When the moisture content decreased from 1% to 41% ~ 38%, the soil evaporation under 75g, 45g and 15g litter decreased 2.38g, 1.43g and 1.30 g, and the higher the degree of decomposition of the covered litter, the less significant the decrease of soil evaporation rate during the decline of soil moisture content.