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1998年 5～ 1 0月在山西省方山县北京林业大学径流林业试验场 ,采用KADEC U2型自记土壤温度仪 ,对刺槐林地 3种集水处理坡面的土壤进行 2 ,1 0 ,2 0 ,5 0cm深度土壤温度的连续全天观测 .结果表明 :各处理坡面土壤生长季平均容积热容量为 :拍光坡面 1 4 44J·cm-3 ·K-1,拍光 +地衣坡面 1 394J·cm-3 ·K-1,自然坡面 1 2 73J·cm-3 ·K-1;平均导热率依次为 0 35 2 ,0 34 4,0 31 1J·(cm·℃·min) -1;平均土壤热扩散率为 0 2 44～ 0 2 47cm2 ·min-1.拍光压实后喷涂引植地衣、苔藓 ,可有效缓解地表裸露后产生的负影响 ,在生长季可降低表层均温 0 2～ 1 5℃ ,降低最高表层土温 2 7～ 4 0℃ ,降低表层土温日较差 2 5～ 3 7℃ ,降低土壤热通量 1 1 %～ 2 5 % ,有效降低土壤蒸发 4%～ 1 5 % .实行拍光压实兼喷涂引植地衣、苔藓的集水造林技术 ,经济实用 ,对土壤水热环境的负面影响小 ,适于推广
From May to October 1998, KADEC U2 self-learning soil temperature meter was used to test the soil moisture of three water harvesting slopes in the Robinia pseudoacacia forestland in the runoff forestry experiment station of Beijing Forestry University in Fangshan County, Shanxi Province. The results showed that the average volumetric heat capacity of soils during the growing season was as follows: 1 4 44 J · cm-3 · K-1 for shoot slope, 1 394J · cm-3 · K-1 and natural slope 1 2 73J · cm-3 · K-1. The average thermal conductivity was 0 35 2, 0 34 4, 0 31 1J · (cm · ℃ · min) -1, and the average soil thermal diffusivity ranged from 0 2 44 to 0 2 47cm 2 · min -1. The photoproduction of lichen and moss after spraying compaction could effectively alleviate the negative effect of surface nudity and reduce the surface layer during the growing season The average temperature is between 0 2 and 1 5 ℃, the maximum topsoil temperature is reduced from 27 ℃ to 40 ℃, the surface soil temperature is decreased from 25 ℃ to 37 ℃, and the soil heat flux is reduced from 11% to 25% Soil evaporation 4% ~ 15% .Application of photoplethysmography and spraying of lichens, moss planting water afforestation technology, economical and practical, the negative impact on soil water and heat environment is small, suitable for promotion