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火炬松嫁接株的成活、生长及开花量受种内和种间不同砧木的影响。用八个松属树种(包括火炬松的全同胞家系和半同胞家系)作砧木嫁接火炬松。赤松虽能提高接株的成活率、增加开花量,但接株生长量降低。在嫁接后的头几年内,种子园的利用似乎很有希望,但在以后的年间,开花量仅仅只接近平均数。用弗吉尼亚松作砧木,能促进堆花和雌球花的开花量,种子园产量好象有一定前途。用全同胞家系和半同胞家系的火炬松作砧木,其种内变异与种间变异几乎一样大。
The survival, growth and flowering of the Pinus taeda grafted plant were affected by different stocking and interspecific rootstocks. Pinus armandii was grafted with eight Pinus species (including all-family and half-sib families of Pinus taeda) as rootstocks. Adenosine can increase the survival rate of access strain, increase flowering, but the strain growth decreased. In the first few years after grafting, the use of seed orchards seems promising, but in the years ahead, flowering is only approaching an average. Pineapple Virginia rootstocks, can promote the flowering of heap flowers and female flowers, the output of seed orchard seems to have a certain future. With all-sib families and half-sib families of loblolly pine rootstocks, intraspecies variation and species diversity is almost the same big.