帽儿山地区21年生兴安落叶松种源试验

The Provenance Test of 21-year Old Larix gmelinii at Maoershan Area

利用兴安落叶松自然分布区内 17个种源 2 1年生的树高、胸径、材积等生长性状及树干通直度进行方差分析 ,其结果是 ,种源间差异显著或极显著。并运用相关分析方法研究了兴安落叶松地理变异规律 ,结果表明 :兴安落叶松的生长性状与纬度呈负相关 ,与经度呈正相关 ;呈明显的经向为主 ,纬向为辅 ,经纬双向连续渐变的特点 ;利用生长性状材料结合 17个种源的地理位置对种源进行聚类分析 ,将各种源在 2 .7遗传距离上分成 3个种源区 :即大兴安岭南、西、北部种源区 (编号为Ⅰ ) ;小兴安岭北部、大兴安岭东部种源区 (编号为Ⅲ ) ;小兴安岭东南部种源区 (编号为Ⅳ ) ,用LSD法对各种源进行多重比较 ,结合综合指数法 。

This paper concerns data from 21-year old of 17 provenances of Larix gmelinii within the natural distribution area, which includes the height, DBH, volume and straight of trunk. Analysis of variance shows that the difference among the provenances reaches significant or great significant level. The rules of geographic variation of Larix gmelinii were studied by using correlation analysis. The results show that the growth characters of Larix gmelinii have a negative correlation with latitude and a positive one with longitude. It presents a dual way line, which regards longitude as dominant and latitude as supplement. By cluster analysis on the growth character and the places of the provenances, three regions were classified in Larix gmelinii range, which are: ①the provenance in the south, west and north part of the Great Xing'an M.(Ⅰ); ②the provenance in the north part of the Lesser Xing'an M. and the east part of the Great Xing'an M.(Ⅲ); ③the provenance in the southeast part of the Lesser Xing'an M.(Ⅳ). By means of the selection of LSD multiple comparing and index, the optimal provenances, Youhao and Wuyiling provenance were given in Maoershan and its neighborhood.