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森林在水资源日趋紧缺的今天,有着减危增水的作用。据科学家观测,森林可以增加空气中的蒸汽。一般说,植物每吸收一公斤水,约有0.99公斤用于蒸腾,只有0.01公斤水保存在体内。而一些树木在生长过程中,所蒸腾的水份,通常要比它本身的重量大300—400倍。比如1亩山毛榉林,一个生长季节能蒸腾186吨水,1亩阔叶林在夏季能蒸腾166.7吨水;1亩云杉林,也可蒸腾142吨水;1亩森林在1年内还可以从地下吸收66—200吨水,散发到空中;1公顷阔叶树,在夏季能蒸腾2500吨的水,
Today, water resources are increasingly scarce in the forest, reducing the risk and increasing water. According to scientists, the forest can increase the steam in the air. In general, each plant absorbs one kilogram of water, about 0.99 kilograms for transpiration, only 0.01 kilogram of water stored in the body. Some trees in the growth process, the transpiration of water, usually 300-400 times more than its own weight. For example, 1 mu of beech forest, one growing season can transpiration 186 tons of water, 1 acre of broad-leaved forest in the summer can transpiration 166.7 tons of water; 1 acres of spruce forest, but also transpiration 142 tons of water; 1 acres of forest within 1 year Absorb 66-200 tons of water underground, distributed to the air; 1 hectare broad-leaved trees in the summer can transpiration 2500 tons of water,