I-69杨产量预测表的编制  

THE RESEARCH AND COMPILATION OF CROP PREDICTION TABLE FOR 1-69 (POPULUS DELTOIDES BARTR. CV. "LUX") STAND

作　　者：洪岩 方升佐[2] 徐锡增[2] 

机构地区：[1]安徽宣城地区林业局,宣城242000 [2]南京林业大学

出　　处：《南京林业大学学报（自然科学版）》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

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.

关 键 词：美洲黑杨 预测模型 立地等级 

分 类 号：S792.110.6[农业科学—林木遗传育种]