伊犁州引种杨树品种中龄期生长特性研究

对伊犁哈萨克自治州27个引种杨树品种八年生植株的树高、胸径进行了方差分析,同时以每公顷材积年生长量为指标进行了聚类分析.结果显示,各杨树品种在胸径、树高生长方面存在显著的差异,表明各杨树品种对当地的环境适应性是不同的,其中年均胸径生长最快的品种是Ⅰ-467,年均树高生长最快的品种是Ⅰ-262,并且树高生长与胸径生长之间存在一定的正相关性.材积聚类分析筛选出表现最好的杨树品种有9个,表现较好的有3个,表现一般的有11个,表现较差的有4个；其中适应性最强、生长最快的杨树品种是大叶钻天杨.这个结果可为今后在伊犁哈萨克自治州进行杨树品种推广及平原造林提供依据.

Research on Growth Characteristics of Introduced Poplar at Middle Age in Yili Prefecture

Variance analysis was conducted on plant height and diameter at breast height(DBH) of 8-year-old plant of 27 introduced poplar varieties in Yili Kazakh autonomous prefecture;meanwhile,the clustering analysis was undertaken using annual volume increment per hectare as index.The results revealed significant difference in DBH and tree height among poplar varieties,indicating that the adaptability of poplar varieties to local environment differed.Variety I-467 grew the fastest in DBH while the annual height growth of I-262 was the fastest.There was a positive correlation between the growth of plant height and DBH.According to clustering analysis,9 varieties behaved the best;3 performed well;11 just performed commonly;and 4 poor performance.The Dayezhuantianyang showed the strongest adaptability and the fastest growing speed among the varieties.The results could provide basis for poplar breed popularization and plain forestation in Yili Kazakh autonomous prefecture.