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杨树是我国植树造林的主要树种之一。当前,在杨树播种育苗方面还存在着播种量大、产苗量和成苗率低,当年达不到出圃标准等问题。同时,造林成活率不高,幼树生长不旺。由于采种过度和过频,使母树林遭到破坏,种源逐渐减少。为了解决这些问题,我们遵照毛主席“阶级斗争、生产斗争和科学实验,是建设社会主义强大国家的三项伟大革命运动,……”
Poplar is one of the main tree species afforestation in our country. At present, poplar sowing seedlings there is still a large amount of seeding, seedling yield and seedling rate is low, then reached the standards and other issues. At the same time, afforestation survival rate is not high, young tree growth is not flourishing. Due to over-mining and over-frequency, the mother forest was destroyed, and the provenance gradually decreased. In order to solve these problems, we follow Chairman Mao’s "three great revolutionary campaigns to build a mighty socialist country: ... class struggle, production struggle and scientific experiments.