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对英德火炬松种子园２２７个无性系产果量问题的研究结果表明，无性系间、株间以及年度间产果量变异很大，差异显著；产果量性状与高、径、材积生长性状呈弱相关，前后年度间以及与３年平均产量间则高度相关。产果量重复力在０．６以上，３～４年球果观察资料可以判断无性系产果能力，从２５％～３０％高产优系中再选择建立改良代种子园，与受选群体均值比，能提高产量６４％～１４５％，甚至更高。
The results showed that there were significant variations in fruit yield among 227 clones in the seed orchard of Yingde and Pinus densiflora. The results showed that there were significant variations in fruit yield among clones, The traits were weakly correlated, with a significant correlation between the years before and after and with the 3-year average yield. Fruit yield repeatability of 0.6 or more, 3 to 4 years of cones observation data can determine the clonal fruit productivity, from 25% to 30% of high yielding and then choose to develop improved seed orchard, and the selected population mean Than can improve the yield of 64% to 145%, or even higher.