赤皮青冈不同种源幼树生物量及营养分配研究

Biomass and nutrient need of young Cyclobalanopsis gilva tree among different provenances

对浙江舟山、湖南靖州、湖南洞口、湖南永定等4个赤皮青冈种源的生物量、营养元素含量进行了测定分析。结果表明:树高排序种源为浙江舟山>湖南永定>湖南洞口>湖南靖州;地径排序种源为浙江舟山>湖南永定>湖南洞口>湖南靖州;总生物量排序种源为浙江舟山>湖南永定>湖南洞口>湖南靖州;幼林各种源的营养元素总量基本遵循树叶>树根>树枝>树干这一规律;各种源的大量元素含量排序为K>N>P>Ca>Mg。通过样地实际情况和养分分析可以看出,最适宜当地环境的种源为浙江舟山种源。

After measuring the biomass, nutrient element content in four Cyclobalanopsis gilva＇s provenances （from Zhoushan Zhejiang, Jingzhou Hunan, Dongkou Hunan and Yongding Hunan）, we found that the tree height featured with such rank as Zhoushan〉Yongding〉Dongkou〉Jingzhou; the collar diameter featured with such rank as Zhoushan〉Yongding〉 Dongkou〉Jingzhou,and rank as Zhoushan〉Yongding〉Dongkou〉Jingzhou in terms of the total biosmass while the total a- mount of nutrients of the young trees turned out to be ranked as leaf〉root〉branch〉stem in each provenance. Maeroelements of four provenances followed such order as K〉N〉P〉Ca〉Mg. The nutrition analysis showed that the most suitable provenance to the local land was Zhoushan Zhejiang provenance.