华北落叶松生长规律初探

Study on growth regularity of Larix principis-rupprechtii

为了进一步了解华北落叶松生长发育规律,为培育大径级的华北落叶松提供基础数据,通过分析年轮宽度和轮枝高度,对0-80a华北落叶松不同年龄胸径和树高的生长量情况进行了研究,结果表明,华北落叶松胸径生长量在80a之前比较稳定,虽然到60a后胸径生长量有所减低,但每年仍然能达到0.5cm左右;华北落叶松树高生长量在林龄50a之后明显减小,到70a后年生长量基本在0.2m左右,到80a时每年仍然有0.2m的生长量。

In order to further study the growth pattern of Larix principis-rupprechtii especially at age between 40-80 a, and provide basic information for the cultivation of large diameter of Larix principis-rupprechtii, different annual tree height and DBH of 0-80 a L. principis-rupprechtii were studied through the analysis of growth ring width and ring branches. The results showed that, the 〈80 a North China Larch diameter stands basically atrelatively stable growth. Altho somewhat, it still could reach 0 h the DBH growth increment of 〉60 a larch decreased cm per year. 50 a North China larch started to decrease its growing volume significantly, but 70-80 a larch still kept the basic annual growth of around 0. 2 m.