| 摘要: |
| 研究了红锥、黧蒴、荷木等6个树种幼苗生物量、养分含量及其养分分布格局。结果表明：红锥干重率最高，白花油茶其次，荷木、黧蒴次之，红桂木、灰木莲最低；白花油茶的叶、红桂木的叶养分浓度为N>K>P，其他苗木的各个器官的养分浓度均为K>N>P；各苗木N浓度为叶>根>枝干，P浓度为根>枝干>叶，各树种器官间的K浓度差异不大；6种苗木的养分贮量均为K>N>P，N贮量在不同器官的排序没有一定的规律，红锥、黧蒴、白花油茶枝干部分P贮量最高，荷木、灰木莲、红桂木根部P贮量最高，6种苗木均为叶片部分P贮量较少，荷木、红桂木根部K贮量最多，其余树种均为枝干部分K贮量最多。 |
| 关键词: 阔叶树 幼苗 干重 养分浓度 养分贮量 |
| DOI： |
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| 基金项目:基金项目：佛山市科技发展专项资金项目（2005020061） |
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| Distribution Patterns of Nutrients in Seedlings of Six Broad-leaved Tree Species |
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Tian Xue-Qin
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| Abstract: |
| The biomass, nutrient concentration and distribution patterns of nutrients in seedlings of six tree species were studied in this paper, such as Castanopsis hystrix, Castanopsis fissa, Schima superba. The result showed as follows: Among the six tree species, the dry weight rate of Castanopsis hystrix ranked the first level, with Camellia oleiferathe second, Schima superba and Castanopsis fissathe third, Artocarpus lingnanensis and Magnoliaceae glancathe last. The order of nutrient concentration in six species was K>N>P, except for the leaves of Camellia oleifera and Artocarpus lingnanensis, which was N>K>P. The order of organs containing nitrogen concentration was leaves>root>branches, however, the organs containing phosphorus concentration were in turns of root >branches>leaves，and there was no significant difference in organs containing potassium concentration. The nutrient amount in total seedlings of six tree species was in turn of K>N>P. There were more phosphorus stored in branches of Castanopsis hystrix、Castanopsis fissa、Camellia oleifera than other organs, but as for Schima superba、Magnoliaceae glanca、Artocarpus lingnanensis, there were more phosphorus stored in their root than other organs, with few phosphorus stored in leaves of all six species.Schima superba、Artocarpus lingnanensis had more potassium stocks in root than other organs, while other species had the largest potassium stocks in branches. |
| Key words: broad-leaved tree seedlings dry weight nutrient concentration nutrient amount |
