湖南楠木次生林胸径地位指数表的研制  

Establishment of DBH site index table for Phoebe zhennan secondary stand in Hunan

作　　者：龚召松 曾思齐[1] 贺东北 龙时胜 姜兴艳 谢勇 GONG Zhaosong;ZENG Siqi;HE Dongbei;LONG Shisheng;JIANG Xingyan;XIE Yong(Central South University of Forestry and Technology, Changsha 410004, Hunan, China;Central South Forestry Inventory and Planning Institute, Changsha 410014, Hunan, China)

机构地区：[1]中南林业科技大学,湖南长沙410004 [2]中南林业调查规划设计院,湖南长沙410014

出　　处：《中南林业科技大学学报》2019年第7期48-55,共8页Journal of Central South University of Forestry & Technology

基　　金：国家林业公益性行业科研专项(201504301)

摘　　要：以湖南省1989—2014年6期一类调查数据为基础,筛选出楠木株数占比大于20%的55块样地共299组年龄-胸径值,编制了楠木次生林地位指数表,为湖南省楠木次生林立地质量评价提供参考依据。用10个常用的数学模型对胸径生长进行拟合,理查德模型的相关系数最大(R^2=0.956),残差平方和最小(SSE=3.950),将其作为导向曲线方程,表达式为D=15.6829(1-e^-0.0457A)^1.0597。以40a为基准年龄,3cm为地位指数级距,得到9、12、15、18和21cm共5条地位指数曲线,分别采用标准差调整法、变动系数调整法和相对优势胸径法进行胸径地位指数表的编制,其中标准差调整法所展开的地位指数表落点检验精度高达(98.96%),不跳级比率为76.67%,且无跳2级或以上的现象,因此以该方法来展开湖南楠木次生林胸径地位指数表。以胸径评价林分立地质量,编制胸径地位指数表,其精度高,适用性强,能较好地反应林木的生长特性。In order to give a reference for the site quality evaluation of Phoebe zhennan secondary forest in Hunan, 299 age-DBH date from 55 sample plots which numbers of Phoebe zhennan S. Lee is more than 20% were used to construct oriented curve, based on the national forest inventory (NFI) date from 1989 to 2014 of Hunan province. The site index table was established for Phoebe zhennan secondary forest in Hunan area. Richards curve model was selected as oriented curve from ten mathematical models, expression is D = 15.682 9 (1-e^-0.045 7A)^1.059 7, its correlation coefficient is biggest (R^2=0.956), and its residual sum of squares the least (SSE=3.950). The datum age was 40 a, and the exponential distance was 3 cm. Five site index curves (9, 12, 15, 18 and 21 cm) were developed on the base of the tree DBH in the twelfth site index. Standard deviation adjustment method, variation coefficient adjustment method and comparative dominant DBH method were used to compile the DBH site index table. The accuracy of landing point test of the status index table developed by standard deviation adjustment method was as high as 98.96%, the rate of non-jumping was 76.67%, and there was no phenomenon of jumping two or more grades. Therefore, the DBH status index table of Phoebe zhennan secondary forest in Hunan province was developed by this method. The stand quality is evaluated by DBH and the site index table of DBH is compiled. The table has high accuracy and strong applicability, and can better reflect the growth characteristics of trees.

关 键 词：楠木 次生林 胸径 地位指数表 

分 类 号：S792.99[农业科学—林木遗传育种]