<正>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.