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为了尽快解决我县用材,烧柴。1981年春,引种Ⅰ—69和Ⅰ—72黑杨穗条500多节,在县重龙山苗圃扦插育苗0.15亩,当年产合格苗486株,平均苗高3.85米,平均地径3.62厘米,1982年又从山东兖州引进Ⅰ—63、Ⅰ—69、Ⅰ—72、Ⅰ—214和沙兰等黑杨的5个无性系穗条70余万节。产壮苗46.2万株,除留作穗条外,在沱江两岸和乡镇作了适生性试验栽培。翌年春,植树25万多株。造林3年,Ⅰ—63,Ⅰ—69,Ⅰ—72,3个新无性系平均树高12.05—
In order to solve my county timber, firewood. Spring 1981, the introduction of I-69 and Ⅰ-72 black poplar more than 500 sections, the county Chong Longshan nursery cuttage nursery 0.15 acres, when the annual production of 486 qualified seedlings, the average height of 3.85 meters, with an average diameter of 3.62 cm, 1982 And introduced more than 700,000 clones of five clones of black poplar such as Ⅰ-63, Ⅰ-69, Ⅰ-72, Ⅰ-214 and sarmentosum from Yanzhou, Shandong Province. 462,000 strong seedlings, in addition to leaving for the spike, in the Tuojiang River and township made a suitability test culture. The following spring, planting more than 250,000 strains. Three years of afforestation, Ⅰ-63, Ⅰ-69, Ⅰ-72, three new clones average height 12.05-