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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.
Cunninghamia lanceolata, Pinus massoniana, Schima superba and Castanopsis carlesii seedlings in subtropical regions were selected to study the effects of carbon (C), nitrogen (N) and phosphorus (P) were calculated and the stoichiometric ratios were calculated.The results showed that: (1) The content of C and N, C / P and N / P of coniferous species were higher than those of broad-leaved species, (2) N and P contents and stems P content of Chinese fir were higher than that of masson pine, but C / N and C / P of different organs were lower than that of Masson pine; N, P and N / P was higher than that of Schima superba. (3) C, N and C / P, N / P of the four kinds of tree seedlings were the highest in leaf, the lowest in C and N, the C / P and N / P Is the lowest, and the content of P is the highest in stems and the lowest in leaves, the highest is in root of C / N and the lowest is in leaves.The results of this study can be used for nurturing seedlings of forest plants in humid and subtropical regions, Provide a reference value.