油松是我国华北、西北地区重要造林树种,分布广,地理变异大。为了给种源选择和种子调拨范围提供科学依据,1978年我们组织了协作组,1979年春进行了育苗试验,1981年春设立了造林试验地。对不同种源的油松进行了造林试验研究。 Pinus tabulaeformis is an important afforestation tree species in North China and Northwest China, with a wide distribution and large geographical variation. In order to provide a scientific basis for the selection of provenances and the scope of seed transfers, in 1978 we organized a collaborative group. In the spring of 1979, a nursery trial was conducted. In the spring of 1981, an afforestation trial was established. Afforestation tests on Pinus tabulaeformis from different provenances were conducted.