论文部分内容阅读
杨树溃疡病是我国杨树干部重要病害之一,对杨树生长造成较大危害,如1990年北京大兴县主栽的小美早杨溃疡病发病率达100％。为了解决杨树生产中的这一问题,由中国林科院林业研究所等单位组成的课题组,经过10多年的联合攻关,取得重要成果。1993年1月13日在北京通过鉴定。 专家们认为,此项研究在国内外首次选用69杨为母本,欧亚黑杨及其种内杂种为父本进行了抗杨树清
Poplar canker disease is one of the most important diseases of poplar cadre in China, causing great damage to the growth of poplar. For example, in early 1990, the incidence of small-canon poplar ulcer was 100% in Daxing County, Beijing. In order to solve this problem in poplar production, the research group composed of the Chinese Academy of Forestry, Forestry Research Institute and other units, after 10 years of joint research, made important achievements. January 13, 1993 passed the appraisal in Beijing. Experts believe that this study for the first time 69 Yang as the female parent at home and abroad, Eurasian black poplar and their hybrids as male parents against poplar