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发展山区林业,一个目的是为了经济效益,增加财富,增加群众收入。另一个目的是为了生态效益,改善生态环境条件,增强抵御自然灾害的能力,促进农业的发展。 我省山区条件是比较差的。在林业用地中,有三分之二的土层厚度小于30厘米,生产力低。据调查,全省林木的年生长量每亩平均仅0.044立方米,全省现有林地的蓄积量每亩平均仅(0.57立方米)为全国亩平均蓄积量的九分之一。如果光算山区的那就更少了。枣庄市一九七五年的林业资源清查,亩蓄积量又小,仅(0.28立
One purpose of developing mountain forestry is to increase economic returns, increase wealth and increase people’s income. Another purpose is to improve ecological environment, improve ecological environment, enhance resilience to natural disasters, and promote agricultural development. Mountain area in our province is relatively poor condition. Two-thirds of the soil in forestry is less than 30 cm thick and has low productivity. According to the survey, the annual growth rate of forest trees in the province is only 0.044 cubic meters per mu. The average volume of existing forest land in the province is only 0.5 times as much as 1/7 of the average volume of mu in the whole country. If you count the mountain area that is even less. Zaozhuang City, forestry inventory in 1975, acres of volume and small, only (0.28 Li