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1992年11月,笔者在“发展什么苹果品种好”一文中,提出了“三为主”的观点,即:从果实质量上讲,应以发展富士优系为主;从矮化密植来说,应以短枝型良种为主;从丰产性、抗逆性看,应以三倍体良种为主。并提出,从接替富士、更换国光、向北推进来讲,应重点发展一下北海道9号(HAC—9)。1993年5月,写了“试论苹果良种北海道9号的引种与推广”;1993年11月,针对读者要求写了“关于引种推广苹果良种北海道9号的几个问题”,1994年10月又写了“北海道9号苹果栽培技术初探”。2年内,烟台果科所实验场及直属的育苗基地,按计划率先培育HAC—9苗木200多万株,并在烟台市和山东省内外建样板基地2万亩。
In November 1992, the author put forward the concept of “three dominate” in his article “What kinds of apple varieties should be developed well”: from the point of fruit quality, we should focus on the development of the Fuji excellent system; , Should be mainly spur-type elite; from the high yield, resistance to look, should triploid seed. He also pointed out that Hokkaido No. 9 (HAC-9) should be the focus of development in terms of taking over from Fuji, replacing Kuomintang and moving north. In May 1993, he wrote “Introduction and Promotion of Hokkaido No.9 Apple Variety”. In November 1993, he wrote “Some Questions Concerning Introduction and Promotion of Hokkaido No.9 Apple Cultivars” in response to the readers’ request. In October 1994, Also wrote “Hokkaido No. 9 apple cultivation techniques”. Within 2 years, the experimental field of Yantai Branch and the seedling raising base directly under the project plan to cultivate more than 2 million HAC-9 seedlings as planned and 20,000 mu of model bases inside and outside Yantai City and Shandong Province.