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我国森林面积仅有9700多万公顷,约占全国土地总面积的10.5％,森林蓄量约有60亿立方米。可是随着祖国社会主义建设事业的发展,木材的需要量逐年增加,在第二个五年计划的最后一年(1962)的最少需要量为6200万立方米,至第三个五年计划的最后一年(1967)的需要量已经翻了一翻,至少需要12000万立方米。因此,现有的林木远远不能满足国家建设的需要。党中央和政府为了迅速扩大森林面积,增加木材资源,号召全国人民在今后3～5年内绿化一切可能绿化的荒山、荒地以及村旁、宅旁、路旁、水旁等地。中央林业部提倡在华北和西北一带大力发展杨树林。杨树生长快,繁殖容易,木材用途广,除可作一般建筑用材外,是纤维工业的重要原料。例如,纸浆、人造纤维、胶合板、纤维板等等的原料,都取之于杨树。
China’s forest area is only 9700 million hectares, accounting for about 10.5% of the total land area of the country, about 6 billion cubic meters of forest reserves. However, with the development of the socialist construction in the motherland, the demand for timber has increased year by year. The minimum requirement for the last year of the second five-year plan (1962) is 62 million cubic meters, and the third five-year plan The demand for the last year (1967) has been doubled, at least 120 million cubic meters. Therefore, the existing tree far can not meet the needs of national construction. In order to rapidly expand the forest area and increase the timber resources, the Central Party Committee and the government urge the people of the whole country to afforest all possible afforested barren hills and wastelands, greenhouses, village houses, houses, roadsides and waterways within the next three to five years. The Central Forestry Department advocates the vigorous development of poplar forests in north and northwest China. Poplar grow fast, reproduce easily, timber is widely used, except for general construction materials, is an important raw material for fiber industry. For example, raw materials for pulp, rayon, plywood, fiberboard, etc. are taken from poplar.