长岭岗林场日本落叶松人工林立地指数表的编制

Compiling the site index table of Japanese larch in Changlinggang forest farm

用 15 0株日本落叶松优势木平均树高年龄资料,根据树高生长过程特性,在比较多个树高生长模型的基础上,选择Richards生长方程H =a(1-e bA)c 作为日本落叶松树高生长模型;通过优势木解析木资料分析,确定基准年龄为 2 0年,立地指数级距为 2m,在 10 - 2 2m范围内划分 7个指数级;用比例法展开导向曲线编制立地指数表。检验结果表明,所编立地指数表精度高,适应性强。

In this paper, height-age data of 150 Larix keampferi were used to construct site index table. According to the characteristics of height grown, Richard equation H=a(1-e -bA ) c was taken as dominant height growth model of Larix kaempferi in Changlinggang forest farm, on the basis of comparing many height growth models. Through analyzing dominating stem-analysis data of Larix kaempferi, 7 index classes were divided out within 10-22 m (baseline age was 20 years, and the interval of site index class was 2m), and site index chart was constructed after guide curve was expanded by proportion method. The examination results indicated that: The accuracy of site index chart was very high and the table was practical. The article also evaluated the habitate quality of Larix kaempferi plantation in Changlinggang forest farm .