我国七十年代中期建立的杉木种子园,已进入大量结实期。因树体高大,约有30%难以采摘下来。解决采种困难的根本途径,可能是选育矮化砧,将优树枝条嫁接在矮化砧木上,使树体矮化,既有助解决采种难的问题,又可提早结实,还可消除因实生砧木遗传上的差异而造成同一无性系中的低产植株,做到优良母树标准化,并为密植创造条件,从而提高单位面积产量。植物通过嫁接,砧木和接穗会互相发生影响。按砧木对接穗生长高矮的影响,可将 China fir seed orchard established in the mid seventies, has entered a large number of strong period. Due to tall trees, about 30% hard to pick it down. The fundamental way to solve the problem of seed production may be breeding dwarfing anvil, grafting elite branches on dwarfing rootstock and dwarfing the tree body, which not only helps to solve the problem of seed-picking, but also leads to early fruiting and eliminates The genetic differences of the rootstocks cause the low yielding plants in the same clones, achieve the good standardization of the parent tree and create the conditions for the close planting so as to increase the yield per unit area. Plants through grafting, rootstock and scion will affect each other. According to the rootstock on the scion growth height effect can be