论文部分内容阅读
巴西国土面积851万平方公里,40％的土地上覆盖着茂密的森林。全国1.3亿人口拥有森林面积3.35亿公顷,森林蓄积658亿立方米。就是在这样一个森林资源丰富的国家里,六十年代以来成功地营造了大面积人工速生丰产林。 1、以解决国内木材供需矛盾和开拓林产品的国际市场为目标,大力营造人工速生丰产林。巴西的大面积森林分布在经济落后的北部亚马逊河流域,生产的木材要经过数千公里的公路运输才能进入销区,运价昂贵。随着经济的日益发展,巴西纸张的消费量激增,近年来每人年平均消费量达到28公斤之多,急需发展造纸工业。而亚马逊河流域的大
Brazil’s land area of 8.51 million square kilometers, 40% of the land covered with dense forests. The population of 130 million people in the country owns 335 million hectares of forest area and 65.8 billion cubic meters of forest. It is in such a country rich in forest resources that large-scale artificial fast-growing and high-yield forests have been successfully built since the 1960s. 1, to solve the contradiction between supply and demand of timber and forest products to open up the international market as the goal, vigorously create artificial fast-growing high yield forest. Brazil’s vast area of forest is located in the economically underdeveloped northern Amazon basin where timber is produced and transported expensively by thousands of kilometers of road transport. With the continuous economic development, the consumption of paper in Brazil surges. In recent years, the annual average consumption per person has reached as much as 28 kilograms, which urgently needs the development of the paper industry. And the Amazon River is big