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森林除为人类提供木材及林产品,具有经济效益外,还具有改善环境的生态效益。如今。人们从大自然的无情惩罚中,愈来愈深刻认识了这个道理。森林的生态效益,即调节气候、涵养水源、保持水土、净化空气等多种环境效益。据我们测算,云南森林仅涵养水源、保持水上两项效益,其价值是木材及林产品价值的6倍多。日本森林的间接作用,是直接产品的25倍。美国森林直接作用与间接作用之比为1:9。可见,森林的生态效益价值远远大于直接产品的价值。森林虽然不能改变大气环境,却能调节和改善局部地区小气候。这是因为森林植被具有较强的蒸
In addition to providing timber and forest products to human beings, forests have the economic benefits and also have the ecological benefits of improving the environment. now. People from the cruel punishment of nature, more and more profound understanding of this truth. The ecological benefits of forests, that is, climate regulation, water conservation, soil and water conservation, air purification and other environmental benefits. According to our calculations, Yunnan forest only conserves water and maintains two benefits on water, which is more than six times the value of timber and forest products. The indirect effect of Japanese forests is 25 times that of direct products. The ratio of direct and indirect forest use in the United States is 1: 9. Can be seen that the value of the ecological benefits of forests far greater than the value of direct products. Although the forest can not change the atmospheric environment, it can regulate and improve the microclimate in some areas. This is because forest vegetation has a strong steamer