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油松种源局部分布区试验结果表明,种源间生长量的差异仍达到极显著的水平,其变异幅度不如全分布区的大,但表现速生的种源与全分布区试验基本一致。综合3次试验得出,秦岭、伏牛山地区以及陕北的桥山、黄龙山一带是甘肃油松造林的优良种源区。今后我省大多数地区油松用种应以南部型和中西型中的商县、洛南、太白、南召、卢氏、广元、黄陵和黄龙等种源为主要对象,禁止调用分布边缘地区的油松种子。
The results showed that there was still a significant difference in the growth of provenances between provenances, and the variation range was not as large as that of the whole distribution areas. However, the sources of fast-growing provenances were basically consistent with those of the whole distribution areas. According to the three experiments, it is concluded that Qinling and Funiu Mountain areas and Qiaoshan and Huanglongshan areas in northern Shaanxi are good provenances for afforestation of Chinese pine in Gansu. In the future, the species of Pinus tabulaeformis in most areas of our province should be mainly for provenance in Shangxian, Luonan, Taibai, Nanzhao, Lushi, Guangyuan, Huangling and Huanglong in the southern and central western regions. It is forbidden to call the distributed marginal areas Pinus tabulaeformis seeds.