苗期试验结果表明 ,不同来源的油松家系后代生长差异不明显 ,同一来源的不同家系后代苗木生长量差异很大 ,生长最好的家系后代比生长最差的高生长大一倍以上 ,家系选择增益显著。油松种子园种子遗传品质较好 ,其苗木高生长比商品种子培育的苗木大 18.3%,逐步推广应用种子园种子有利于提高造林的经济效益 The results of seedling experiment showed that there was no significant difference in the growth of offspring among the different origins of P. tabulaeformis. The growth of seedlings in different offspring of the same origin differed greatly. The offspring with the best growth were more than double the height of the worst growth, Choose gain significantly. The seed quality of Pinus tabulaeformis seed orchard is better, and its height growth of seedlings is 18.3% higher than that of nursery stock cultivated with commercial seeds. The gradual popularization and application of seed orchard seeds will improve the economic benefits of afforestation