桦南林区兴安、长白落叶松种源试验初报

A PRIMARY REPORT ON THE PROVENANCE TEST OF LARIX GEMILINII AND LARIX OLGENSIS IN HUANAN FOREST REGION

本文根据桦南林区兴安落叶松、长白落叶松7年生种源试验的结果:①研究了两个树种的地理变异规律——经向变异为主、纬向变异为辅的经纬双向连续渐变的趋势;②在桦南林区兴安和长白落叶松都表现出极大的适应性,差异显著性分析表明,种间的差异不十分明显,各个树种的不同种源间差异极为显著,长白落叶松的最佳种源为和龙、小北湖,兴安落叶松的最佳种源为友好、乌伊岭;③两个树种的最佳种源间差异也达到显著性水平,其中以和龙种源的长白落叶松表现最好,因此可以认为长白落叶松在桦南林区更有发展前景,特别和龙和小北湖种源可以大量推广造林,在此二种源供种不足时,可以营造友好、乌伊岭种源的兴安落叶松。长白落叶松4年与7年生种源高生长的秩次相关分析结果证明,种源生长性状的早期选择是可行的。

On the basis of seven year provenance test of Larix gmelinii and Larix Olgensis in Huanan Forest Region, The rules of geographic variation of those two species have been studied① It is a dual-way cline which relies longitude mainly and latitude subsidiary;②It expresses highly adaptability for both Larix gmelinii and Larix olgensis. Through variance analysis, it demostrates no significant difference between two species, and highly significant difference among the provenances for each spocies. The optimal provenance is Helong and Xiaobeihu provenences to Larix olgensis; and You hao, Wuyiling provenances to Larix gmelinii; ③ The differece among the optimal provenances of each species reaches apparent level, in which the best one is Helong provenance to Larix olgensis Therefore, it may consider that Larix olgensis has better prospects in Huanan Forest Region, particularly Helong and Xiaobeihu provenances. The order correlation analysis in height growth between four year and seven year provenances of both species indicates that the early selection of the provenances is feasible.