我场于1966年开始营建杉木嫁接种子园。初搞杉木嫁接时,接株偏冠严重。不能形成完整冠形(塔式树冠)的接株,不仅树型不好看,结实层薄,种籽产量低,而且易遭风雨和冰雪折损,我场1972年一次就被冰雪折损20多株。工人群众称这种接株叫做“上面一把扇,下面光杆杆,结实又不多,冰雪一来就完蛋”。为了解决杉木嫁接偏冠的问题,提高杉木嫁接种子园的结实量,我场革命职工和技术人员遵 My field began construction in 1966 fir grafted seed orchard. Early engage in grafting, the grafted crown serious crown. Can not form a complete crown (tower canopy) of the strain, not only does not look good tree, thin stout, low seed yield, but also vulnerable to wind and rain and snow damage, my field once in 1972 was snow damage more than 20 Strain. The masses of workers called the plant called “a fan above, the following light pole, sturdy and not much snow and ice to the end.” In order to solve the problem of Chinese fir grafted crown, to improve the seed of fir grafted seed orchard, my field workers and technicians comply with the revolution