华北落叶松与长白落叶松生长比较研究

Growth comparison between Larix principis-rupprechtii Mayr. and Larix olgensis Henry

河北省冀北山地人工林主要以华北落叶松为主,树种较为单一。研究通过对木兰围场华北落叶松和长白落叶松的标准地调查与数据分析表明,长白落叶松总体上生长较弱于华北落叶松,但差异不显著,造林时可以用长白落叶松代替部分华北落叶松。长白落叶松耐阴性较华北落叶松差,进行林分管理时要保持合理的林分密度。

Larix principis-rupprechtii Mayr. is the dominate tree species of plantations in the mountains land in north Hebei province, where the tree species is single and unified. The sample plot investigation and data analysis of Larix principis-rupprechtii and Larix olgensis were conducted at Mulan-weichang Area. The results showed that the overall growth of Larix olgensis is weaker than Larix principis-rupprechtii but there is no significant differ- ence between them. Therefore, Larix olgensis can be used in place of some Larix principis- rupprechtii when planting larch. Since the shade tolerance of Larix olgensis is weaker than Larix principis-rupprechtii, the stand should keep reasonable density when managing the forest plantations.