长白落叶松种源选择及其地理变异规律的研究

本文对吉林松花湖试验点4年生长白落叶松种源试验林生长性状的方差分析及多性状的综合评定,初步确定吉林地区及毗邻地区最佳种源为白石山种源;较好种源为松江河青川、和龙、长白县海拔1075米种源。估算树高、年高生长量、地径遗传力分别为0.8814、0.8959、0.8291,若选择最佳白石山种源造林,幼龄期树高、地径遗传增益分别为25.1%和20.3%。各种源从苗期到4年生树高生长差异显著,且具有稳定的变异趋势,幼林生长性状随地理坐标无明显变异规律。在同一地点不同海拔高度的采种点,中低海拔生长较好,高海拔生长较差,二者差异显著。

Study on the Provenance Selection and the Geographical Variation Rules of Korean Larch

After the growth characteristics variance analysis and multi-characteristic integrated evaluation of four-year. Korean Larch young trees, BaiShiShan is prelimirarily considered to be the best provenance; Qingchuan in SongJiangHe, HeLong and above the elevation of 1075m in ChanBai County are considered to 'be the better provenances around JiLin Prefecture. The estimate values of heritability of height; annual height growth and ground diameter are 0.8814; 0.8959 and 0.8291, The genetic gains of height and ground diameter in seedling stage are 25.l%and20,3 % if the seeds from Bai Shi Shan -the best provenance were used for plantation, The differerce of height growth is not only significant, but also stable from the first to the fourth year. The growth characteristics of young trees do not vary with the geographic coordinates. To the same provenances, seedlings from the low and middle elevation grow better than from high elevation and the difference is significant.