| 摘要: |
| 以深圳坝光湿地园银叶树（Heritiera littoralis）群落为研究对象，分析了深圳坝光湿地园银叶树群落 8 种优势树种叶片碳、氮、磷含量及其化学计量关系，以及 3 种生境（沼泽、山地、临海）土壤和不同土壤深度（0~10 cm、10~20 cm、20~40 cm）有机质、全氮、碱解氮、全磷、有效磷含量及其化学计量关系。结果表明：不同优势树种叶片的碳、氮、磷含量及其计量特征具有显著差异，显示出明显的种间差异性；不同生境（临海、山地、沼泽）之间的土壤差异主要表现为氮及碳氮比，其他如有机质、磷等差异不明显；不同土层则表现为有机质和氮差异明显，浅层土壤元素含量最高，其他指标在各土层中差异不显著。研究表明，除银叶树生长可能受到氮限制外，其他优势树种元素限制现象不明显。 |
| 关键词: 银叶树群落 优势树种 叶片 C N P 化学计量 |
| DOI： |
| 投稿时间：2018-10-25修订日期：2018-10-25 |
| 基金项目:深圳市野生动物救护中心项目（坝光银叶树湿地园监测） |
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| Stoichiometry Characteristics of Dominant Tree Species and Soil in Heritiera littoralis Community in Baguang Wetland Park in Shenzhen |
| SUN Hongbin,WANG Zuolin,ZHU Ziwei,Huang Fangfang,GAN Xianhua,ZHANG Weiqiang |
| (Shenzhen Wildlife Rescue Center;Guangdong Provincial Key Laboratory of Silviculture, Protection and Utilization/Guangdong Academy of Forestry) |
| Abstract: |
| In this work we compared the element contents including C, N and P, and stoichiometry characteristics among eight dominant tree species, and we also compared the element contents of organic matter, total nitrogen, available nitrogen, total phosphorus and available phosphorus as well as the stoichiometry characteristics among soil in three habitats (marsh, hill and seaside) and different soil depths (0-10 cm, 10-20 cm, 20-40 cm) in Heritiera littoralis community in Baguang wetland park. The results showed that there was significant difference in element contents and stoichiometry characteristics in leaves among tree species. The content of nitrogen and C:N differed significantly among different habitats, but the contents of organic matter and phosphorus did not show significant difference. The upper soil contained the highest contents of organic matter and nitrogen compared to the other two layers. Our results suggest that there were no obvious element constraints observed in plant growth in the community, except for H. littoralis which may have suffered N constraints during its growth. |
| Key words: Heritiera littoralis community dominant tree species leaf C N P stoichiometry |
