黄龙山林区森林资源丰富,是我省主要用材林基地之一。油松在本地区分布范围广,适应性强,生长快,材质好,是荒山造林、森林更新和林分改造的主要树种。但是在长期的生产过程中,由于没有进行认真的选育良种,成林树木生长缓慢,干形弯曲,病虫危害严重,种源缺乏,种子品质衰退,直接影响到群众性育苗造林运动的进展和质量。为了迅速贯彻落实毛主席“有了优良品种,即不增加劳动力、肥料,也可获得较多 Huanglongshan forest rich in forest resources, is one of the main timber forest base in our province. Pinus tabulaeformis distributed in the region a wide range of adaptability, fast growth, good material, is afforested barren hills, forest regeneration and reforestation of the main tree species. However, in the long-term production process, the progress of mass afforestation and afforestation is directly affected by the lack of careful breeding of seedlings, the slow growth of trees in forest, dry bending, severe damage to pests and diseases, lack of provenances and the decline of seed quality And quality. In order to promptly implement Chairman Mao, "With excellent varieties, that is, without increasing labor force and fertilizer, more can be obtained