摘要
本文根据在江苏、安徽、湖南、湖北调查的40块临时样地和江苏睢宁、宝应的8块11年生固定样地所获得的337组建模数据,建立了以密度(株·ha^(-1))、林龄(a)和立地等级为输入变量,林分材积(m^3·ha^(-1))、林分平均胸径(cm)、林分平均高(m)及林分胸高断面积(m^2·ha^(-1))分别为输出变量的产量预测模型。经F和偏于F检验表明,预测模型精度高,可靠性强。按3个立地等级,应用所建的模型,编制了Ⅰ-69杨林分可变密度产量预测表,以期为黑杨派南方型杨树的定向培育提供评价依据。
In this paper, 337 set growth data were collected from the pure and same age stands of I -69 in Jiangsu, Anhui, Hunan and Hubei Province, China. Through analysing the key factors affecting crop of Ⅰ -69 stand, age of tree, stand density and site grade are determined as predictors. With the method of Ordinary Least Squares, the single-crop prediction models are developed. According to the models, variable density crop tables for the pure and same age stands of Ⅰ -69 are also worked out.
出处
《南京林业大学学报（自然科学版）》
CAS
CSCD
1992年第3期25-30,共6页
Journal of Nanjing Forestry University：Natural Sciences Edition
基金
本文系"七.五"国家科技攻关项目75-07-02-62专题的研究内容之一
也属于研究生论文中的部分内容
关键词
美洲黑杨
预测模型
立地等级
Cottonwood
Prediction model
Site grade
Variable density crop table
