伊犁州杨树成龄期品种聚类筛选

Clustering screening of maturing Populus in Yili Kazak Autonomous Prefecture

【目的】对伊犁州不同杨树品种生长特性进行调查,为林木的规范管理、杨树造林树种的良种选择及优质苗木的培育提供理论依据。【方法】调查伊犁州27个杨树主栽品种的树高、胸径,计算出各杨树品种的材积,采用方差分析和聚类分析对27个杨树品种进行分类。【结果】不同杨树品种的树高、胸径差异显著,27个杨树品种可分为4类:第1类长势最好,仅I-467、日本白杨2个品种;第2类长势较好,包括银×新12等9个品种;第3类长势良好,包括银×新4等4个品种;第4类长势一般,包括中林23、加杨、林场银×新、马里兰德4个品种。【结论】从27个杨树主栽品种中筛选出长势最好的杨树品种2个,长势较好的9个,长势良好的12个,这些良种抗逆性较强,适宜在伊犁州平原林场栽培种植。

[Objective]Growth characteristics of different Populus species in Yili Kazak Autonomous Prefecture were investigated to provide references for managing forests, selecting top varieties and breeding elite seedlings. [Method]According to ANOVA and clustering analysis, 27 main-planted Populus species were classified based on their height, diameter at breast height （DBH） and volume. [Result]Significant difference in plant height and DBH among different species of Populus were found. The 27 Populus species were classified into 4 different groups with best （I-467 Japanese white poplar）, better （Yin×Xin12,etc.）, good （Yin×Xin4, etc.） and ordinary growth vigor （Zhonglin23, Populus canadensis Moench, Yin×Xin, Malilande）, respectively. [Conclusion]Among the 27 species, 2 grew best, 9 grew better and 12 grew well, all of which had strong resistance and were suitable for planting in plain forestry farm of Yili Kazak Autonomous Prefecture.