苏联乌克兰社会主义加盟共和国在七年计划内将完成速生树种造林75万公顷。乌克兰地区的主要速生树种是杨树,但过去造林中所用的杨树种苗都未进行过选种。针对以上情况,乌克兰林业和森林改良土壤研究所提出了普遍在生产单位建立选种网的建议。1957年,林业和森林改良土壤研究所将本所的杂 The Soviet Union, the Socialist Republic of Ukraine, will finish planting 750,000 hectares of fast-growing tree species within the seven-year plan. The main fast-growing tree species in Ukraine are poplar, but none of the poplar seedlings used in pasturing have been selected. In response to the above, the Ukrainian Institute of Forestry and Forest Improvement proposed the proposal to establish a seed selection network in general. In 1957, the Institute of Soil and Forest Improvement Institute put the Institute’s complex