对11个乐昌含笑种源在浙江省余杭区长乐林场进行造林试验,通过对3年生试验林的调查观测,结果表明,不同种源乐昌含笑在浙江省造林幼林保存率相差较大,树高、地径性状在各种源间差异极显著,均具有很高的广义遗传力,且幼林表现呈较为明显的地理分化趋势,西部、南岭西南部种源保存率不高,生长相对缓慢,但其中亦有生长较好家系,而南岭以北的中东部诸种源造林保存率较高,生长亦较好,应是适宜的种源材料.立地条件对乐昌含笑造林保存率影响较大,但幼林生长量在立地间差异不显著,可能是随着幼林生长,林分趋于郁闭,水肥条件改善,使得立地对生长的影响趋弱.%11 provenances of Michelia chapensis were tested in Changle Forest Farm in Zhejiang Province. The investigation into the 3-year-old experimental forest showed that the preserving rates among the provenances were very different. Both the tree height and ground diameter differences were very significant among the provenances, also they all had high broad heritability. The preserving rates showed an obvious geographical differentiation trend. The provenances from Western China and Southwest of Nanling Mountain were of low preserving rates and grew slowly. However, those from mid-eastern China had high preserving rates, and they grew well, then these provenances should be suitable materials. Site conditions had important influence on for-estation preserving rates of Michelia chapensis, but the growth differences among sites were not significant. Maybe with the young forest growing and canopy density increasing, water and fertilizer conditions improved, which decreased the influence of site conditions for growth.
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