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亚热带4种林木幼苗的碳氮磷含量及其化学计量比特征

ISSN号：1006-687X
期刊名称：《应用与环境生物学报》
时间：0
分类：S718.554.2[农业科学—林学]
作者机构：[1]福建师范大学地理科学学院,福州350007, [2]湿润亚热带山地生态国家重点实验室培育基地,福州350007, [3]福建省植物生理生态重点实验室,福州350007
相关基金：国家自然科学基金项目（31170596,31170374,31370589）、福建省种业创新和产业化工程项目（2014S1477-4）和福建省科技厅重大项目（2014N5008）资助

作者：郑跃芳[1,2,3], 钟全林[1,2,3], 程栋梁[1,2,3], 张中瑞[1,2,3], 邓兴宇[1,2,3]

关键词：碳氮磷含量, 化学计量比, 亚热带, 林木幼苗, C, N and P content, stoichiometric ratio, subtropics, tree seedling

中文摘要：

以亚热带区域4种主要森林植物杉木（Cunninghamia lanceolata）、马尾松（Pinus massoniana）、木荷（Schima superba）、米槠（Castanopsis carlesii）幼苗为研究对象，分别测定其不同器官碳（C）、氮（N）、磷（P）含量，并计算其化学计量比. 结果表明：（1）针叶树种C、N含量以及C/P、N/P高于阔叶树种，P含量及C/N则低于阔叶树种. （2）杉木叶片N、P含量及茎P含量高于马尾松，但各器官的C/N与C/P低于马尾松；米槠根N含量、C/P、N/P高于木荷. （3）4种林木幼苗的C、N含量及C/P、N/P均以叶为最高，根的C、N含量为最低，茎的C/P和N/P为最低；P含量以茎为最高，叶为最低；C/N以根为最高，叶为最低. 本研究结果可为我国湿润亚热带区域森林植物苗木培育、幼林养分管理及人工造林时立地选择等提供参考价值.

英文摘要：

This study aimed to explore the stoichiometric characteristics of different plant organs of subtropical plants. The C, N, and P contents in tree seedlings of four dominant forests （i.e. Cunninghamia lanceolata, Pinus massoniana, Schima superba, and Castanopsis carlesii, respectively） were measured in different organs, and C, N, and P stoichiometric ratios were calculated. （1） C and N contents, as well as C/P and N/P ratios in coniferous forests, were higher than those in broad-leaved forests, while the P content and C/N ratio followed the opposite trend. （2） Leaf N content, as well as leaf and stem P content in C. lanceolata forests were higher than those in P. massoniana forests, while the C/N and C/P ratios in each organ of P. massoniana forests were higher than those of C. lanceolata forests. Root N content, C/P ratio, and N/P ratio of C. carlesii were higher than those of S. superba. （3） In general, C and N contents, as well as C/P and N/P ratios in the leaf were the highest; the stem contained the highest P content, whereas the leaf contained the lowest P content; the C/N ratio in the root was the highest, while that in the leaf was the lowest. These results reveal the C, N, and P stoichiometry of four tree seedlings in a subtropical moist area, providing a valuable reference for the site selection of artificial afforestation.

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