论文部分内容阅读
从本省实际出发,制定一个合理的林业总体规划,可以使林业在国民经济各行各业激烈竞争的外部环境中协调发展。现就本省林业发展途径作一些粗浅探讨。 一、当前林业状况简析 党的十一届三中全会以来,本省林业是稳步发展的趋势,主要表现在: 1.森林资源不断增长 据1986年统计,有成片林723万亩,较1979年增长48.5％,林木蓄积量2500万立方米,较1979年增长66.3％,林木年采伐量58万立方米,较1979年增长176.2％,森林覆盖率由6％上升为8％。木材产量稳步增长,后备资源不断扩大,基本实现了永续利用。 2.平原绿化有了突破性发展 全省农田林网达3000万亩,占可建林网的农田面积50％,四旁树木12亿株,其蓄积量占总蓄积量的75％。苏北平原已有20个县(区)达到平原绿化的标准,森林覆盖率由建国初期的2％上升为10％。 3.丘陵山区林业不断巩固和发展400多万亩宜林荒山已绿化320万亩,较建国初期增加200多万亩,使4233平方公里水土流失得到有效的控制。 4.林种结构开始变化 1979年各林种的比例为:用材林39.5％,防护林8.9％,
Starting from the reality of our province, formulating a rational forestry master plan will enable forestry to develop harmoniously in the highly competitive external environment in which all walks of life in the national economy compete. Now on the province’s forestry development approach to make some superficial discussion. First, the current state of forestry Brief analysis Since the Third Plenary Session of the Eleventh CPC Central Committee, the province’s forestry is a steady development trend, mainly in: 1. The continuous growth of forest resources According to 1986 statistics, a succession of forest 723 acres, more than 1979 The annual growth rate was 48.5%. The volume of forest stock was 25 million cubic meters, an increase of 66.3% over 1979. The annual harvest of forest trees was 580,000 cubic meters, an increase of 176.2% over 1979 and the forest coverage rate increased from 6% to 8%. The steady growth of timber output, reserve resources continue to expand, the basic realization of sustainable use. 2. Plain Green has a breakthrough development of the province’s farmland forest network up to 3000 mu, accounting for 50% of the farmland can be built forest network, surrounded by 1.2 billion trees, the volume of the total volume of 75%. 20 counties (districts) in the plain of North Jiangsu have reached the standard of plains greening, and the forest coverage rate has risen from 2% in the early days of the founding of New China to 10%. 3. Hilly and mountainous areas Forestry Consolidate and develop more than 4 million mu of afforested barren hills Greening 3.2 million mu, an increase of more than 2 million mu from the early days of the founding of the People’s Republic of China, effectively controlling 4233 square kilometers of soil erosion. 4. Forest species structure began to change In 1979 the proportion of various forest species: timber forest 39.5%, 8.9% protection forest,