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试验地选择临沂沂河沿岸银杏防护林。此试验地的防护林主要是为了防御风沙、保护沂河河堤和防止沿岸土壤返盐而营建。森林涵养水源效益无法直接计算,需通过土壤蓄水能力(量)来计算,因此选取调查了此试验地生态防护林在不同林龄、密度下的土壤物理性质,分析在不同林龄和密度下各个物理性质的变化规律,尤其是土壤蓄水价值和森林净化水质价值的变化规律,评估其涵养水源价值。
Experimental selection Linyi Yi River ginkgo shelter. The shelterbelts in this experimental area were mainly built to protect the wind and sand, protect the Yi River embankment and prevent salt return to the soil along the coast. Therefore, the soil physical properties under different stand ages and densities of the ecological shelterbelt in this experiment were investigated. The effects of different waterlogging ages and densities The change law of physical properties, especially the changing law of soil water storage value and forest purified water quality value, evaluate the value of water conservation.