在国内外大好形势下,随着社会主义建设的突飞猛进,加快了林业生产的步伐。为适应林业发展的需要,促进林木速生优质丰产,我场对外地杂种杨近年开始做了一些选育试验工作。一、杂种杨的引进遵照毛主席“有了优良品种,即不增加劳力、肥料,也可获得较多的收成”的伟大教导,在上级党政主管部门的重视和支持下,我们从1972年秋开始了杂种杨的引种试验工 Under the favorable situation at home and abroad, with the rapid development of socialist construction, the pace of forestry production has been accelerated. In order to meet the needs of forestry development and promote high-yielding and high-yielding forest trees, my field began to do some breeding experiments in recent years. I. Introduction of Hybrid Yangs According to Chairman Mao’s great teaching that “with excellent varieties, that is, more harvests can be obtained without increasing labor, fertilizers,” we attach great importance to and support from the superior party and government departments at the higher levels. From the autumn of 1972 Started the introduction of hybrid Yang experimental workers