西南桦和南洋杉科树种在镇海的引种栽培效果

The Introduction and Cultivation Effect of Betula alnoides and Araucariaceae Species in Zhenhai

三树种生长比较结果显示,西南桦在镇海林场即低山丘陵地有较大发展潜力,6.5 a生平均树高11.6 m,平均胸径12.9 cm,年均生长量分别为1.78 m,1.98 cm,最大径阶达到21 cm,生长迅速,值得经营和发展。肯氏南洋杉和贝壳杉生长慢,其生长量只有西南桦的50%左右,发展潜力小,不宜作为用材林经营,而作为庭园绿化和美化树种则较好。

In this article, there is a comparison about field growth tests of three trees in Zhenhai Forest Farm. The result showed that Betula alnoides, with a average 11.6 m height and 12.9 cm diameter in six year-old plantation, has a deep development potential. Compared with B. alnoides, Araucaria cunninghamii and Agathis damara have a slow growth, with a annual growth that is only half of the B. alnoides. So the two species were not suitable timber production, maybe were good choices for garden greening.