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杨树是菏泽市营造农田林网、速生丰产林和四旁值树的主要速生用材树种,约占全市树木总株数的70%左右。近十多年来,全市推广的杨树品种主要是Ⅰ-69杨、中林46,栽培品系太少,不利于维持生态平衡,不能满足加工对杨木的多种需求。1989年,引进中国林科院林研所新培育的七个未测定的黑杨派杂种进行苗期和造林试验。同时以省内外引进一批已经鉴定的新品种,进行区域化试验,从中选育出适于菏泽市栽培的优良新无性系
Poplar is Heze City, the construction of farmland network of forest, fast-growing and four-value tree stands near the rapid growing timber species, accounting for about 70% of the total number of trees in the city. In the recent ten years, poplar varieties popularized in the whole city are mainly Ⅰ-69 Yang and Zhonglin 46, with too few cultivated lines, which is not conducive to maintaining ecological balance and can not meet the various needs of poplar processing. In 1989, seven non-measured hybrids of Blackleg were newly cultivated by Forest Research Institute of Chinese Academy of Forestry for seedling and afforestation experiments. At the same time, a batch of new varieties that have been identified have been introduced both inside and outside the province to carry out the regionalization experiment, and breeding fine new clones suitable for cultivation in Heze City