兴安落叶松种源区划及优良种源选择

对兴安落叶松17个种源的树高、胸径和材积等生长性状进行方差分析的结果表明：种源间差异显著或极显著，并通过相关分析研究了兴安落叶松地理变异规律。兴安落叶松的生长性状主要受3个因子的影响。经度和海拔为主，纬度为辅，呈现出水平和垂直双向连续渐变的特点。对生长性状和各种源的地理位置进行聚类分析，划分为3个种源区：大兴安岭南、西、北部种源区；小兴安岭北部、大兴安岭东部种源区；小兴安岭东南部种源区。对各种源的生长性状进行了多重比较，选出乌伊岭和友好种源为帽儿山及其毗邻地区的最佳种源。

Provenance Division and Superior Provenance Choice of Larix gmelinii

The paper concerned data from 17 provenances of Larix gmelinii,which included the height,DBH,volume.Analysis of variance showed that the difference among the provenances reached significant or great significant level.The rules of geographic variation of Larix gmelinii were studied by correlation analysis.The growth characters of Larix gmelinii were influenced by three factors. It presented a dual way line in both horizontal and vertical,which regarded longitude,and elevation as dominant,latitude as supplement.By cluster analysis on the growth characters and the places of the provenances,three regions were classified in Larix gmelinii range, which were the provenance in the south,west and north part of the Great Xing'an M.;the provenance in the northe part of th Lesser Xing'an M.and the east part of the Great Xing'an M.;the provenance in the southeast part of the Lesser Xing'an M..By meas of LSD multiple comparing the optimal provenances,Wuyiling and Youhao provenances were given in Maoershan and its neighborhood.