花旗松引种试验研究

通过育苗和造林试验表明,花旗松苗期抗病性比油松强,幼林抗鼠害能力强,抗寒性稍差,保存率和造林成活率与油松接近,2年生苗木与对照油松苗木之间苗高生长差异极显著,平均地径0.53 cm,平均苗高18.3 cm,苗期生长表现优于当地油松。20年生林分平均胸径8.4 cm,平均树高5.3 m,最大单株胸径15.3 cm,树高7.5 m,生长表现与当地油松差异不显著。通过育苗和造林试验表明花旗松适应小陇山林区的生态条件,引种获得成功。

Study on Introduction and Trial of Pseudotsuga menzinesii

A trial on breeding and afforestation of Pseudotsuga menzinesii was made in Xiaolongshan forest area.The results indicated: its young forest had stronger ability for resisting rat damages,but poor in cold tolerance,and its survival rate and saving rate of afforestation were near that of indigenous Pinus tabulaeformis;there was extremely significance in height growth between Pinus tabulaeformis and 2-year-old Pseudotsuga menzinesii with mean height of 18.3 cm and basal diameter of 0.53 cm and the growth performance of Pseudotsuga menzinesii in seedling stage was better than that of Pinus tabulaeformis;its 20-year-old forest had no significant difference in growth performance compared with Pinus tabulaeformis and the mean breast height diameter and height were 8.4 cm and 5.3 m,whereas its maximum individual were 15.3 cm and 7.5 m.The trial of breeding and afforestation of Pseudotsuga menzinesii showed that it adapted to the ecological condition of Xiaolongshan forest area and its introduction was successful.