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１ 红松坚果生产中存在的主要问题１．１ 忽视红松坚果型优树的选择 优树是指在立地类型相同的条件下，选出在生长、结实和抗性上都具有明显优势的单株。目前黑龙江省绥棱、绥阳、林口、大海林、海林等地现已嫁接的１０万株（１２．３ｈｍ２）红松接穗，都是从没有经过鉴定是否
1 The main problems in the production of Korean pine nut 1.1 Neglect of the selection of Korean pine tree Excellent tree refers to the site under the same type of conditions, the selection of the growth, strength and resistance have a distinct single Strain. At present, 100,000 lines (12.3hm2) of Korean pine scion, which have been grafted in Suiling, Suiyang, Linkou, Da Hailin and Hailin of Heilongjiang Province, have never been identified whether or not