过去,松类造林均采用一年生苗,而用二年生苗一般认为成活率低。1966—1967年,我们在海岛进行了二年生黑松苗一锄法造林的试验。实践证明,在风大、土薄、立地条件差的海岛上,用二年生黑松苗造林是完全可行的,其成活率一般在70—90%。(附表) In the past, pine afforestation were adopted annual seedlings, while with two years of seedlings are generally considered low survival rate. From 1966 to 1967, we experimented with a two-year-old black pine seedling by afforestation on the island. Practice has proved that in windy, thin earth, poor site conditions of the island, with two-year black pine seedlings afforestation is entirely feasible, the survival rate is generally 70-90%. (Schedule)