樟子松种源试验的研究(Ⅲ)——地理变异规律

STUDIES ON PROVENANCE TRIAL OF PINUS SYLVESTRIS VAR. MONGOLICA (Ⅲ) GEOGRAPHIC VARIATIONS

本文在24个参试点中,对4个有代表性参试点的材料进行地理变异分析,结果表明,樟子松种源间存在着明显的地理变异。子代生长、形态、物候的变异主要受年积温和绝对湿度的影响、湿度大的地区,高生长快,冠幅大,其物候呈现萌动晚,停止生长也晚的变异。

The 24 provenance trial sites were ecologically divided into 3 silvicultural regions, four typicaltest sites were selected,and the geographic variations of the progenies were analyzed. The results indicate that there is a significant geographic variation of the important characters of the offsprings among different provenances, and this kind of variation is mainly affected by annual accumulated temperature (YAT), absolute humidity (AH) and some other climatic factors. In the regions of high YAT and AH, height growth of the, offsprings is faster, Width of canopy is larger, and the phenology is characterized by a tendency of both sprouting and stopping growth later.