| 暖温带地区主要树种叶片凋落物分解过程中主要元素释放的比较 |
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| 引用本文： | 王瑾,黄建辉.暖温带地区主要树种叶片凋落物分解过程中主要元素释放的比较[J].植物生态学报,2001,25(3):375-380. |
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| 作者姓名： | 王瑾 黄建辉 |
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| 作者单位： | 中国科学院植物研究所 |
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| 基金项目： | 中国科学院重点项目(KZ952-J1-103) |
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| 摘 要： | 应用分解网袋法对暖温带落叶阔叶林内分布较为优势的辽东栎（Quercus liaotungensis)、五角枫（Acermono)、蒙椴（Tilia mongolica)、糠椴（T.mandshurica)等4种植物叶片凋落物第一年的分解速率损失过程基本符合Olson的指数降解模型。4种凋落物的分解速率（凋落物的年重量损失）依次为五角枫＞糠椴＞蒙椴＞辽乐栎。N、P、Na、Fe、Cu、Mn在几种凋落物残留物中各自有不同程度的富集。C、K含量显著单调下降，其它几种元素含量变化不太规律。可以看出，元素的初始含量对其释放速率有很大影响，当微生物固持作用使C与其它元素比升高到某一阈值时，元素开始释放；初始含量较高的元素则从最初开始释放。高含量的木质素对元素的净释放有一定抑制作用，而在凋落物分解初期影响不大。
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| 关 键 词： | 叶片凋落物 分解 暖温带 |
| 修稿时间： | 2000年7月17日 |
COMPARISON OF MAJOR NUTRIENT RELEASE PATTERNS IN LEAF LITTER DECOMPOSITION IN
WARM TEMPERATE ZONE OF CHINA |
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| WANG Jin and HUANG Jian Hui.COMPARISON OF MAJOR NUTRIENT RELEASE PATTERNS IN LEAF LITTER DECOMPOSITION IN
WARM TEMPERATE ZONE OF CHINA[J].Acta Phytoecologica Sinica,2001,25(3):375-380. |
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| Authors: | WANG Jin and HUANG Jian Hui |
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| Abstract: | Decomposition of leaf litter in temperate forest was examined using the litter bag method during a one year period.Decomposition rates and the release dynamics of ten nutrients(C,N,P,Ca,Mg,Fe,Cu,Mn,K and Na)in leaves of four locally dominant species, Quercus liaotungensis,Acer mono,Tilia mongolica and T.mandshurica were measured. Litter mass loss processes were simulated using Olson's exponential model and the consequent decay rates of the four species' leaf litters (annual mass loss)decreased in the order of Acer mono>T. mandshurica>T.mongolica>Quercus liaotungensis. Varying degrees of accumulation of six elements(N,P,Na,Fe,Cu and Mn) were found in all four species' litter residues.C and K content monotonically decreased markedly while other nutrients showed no regular pattern.That release rates were strongly influenced by initial nutrient contents,indicates that nutrients did not begin biological release until their content ratio rose to a certain extent under immobilization by microorganisms.High lignin content in leaf litter inhibited the mineralization of organics in most cases, despite a relatively minor effect during early decomposition stage. |
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| Keywords: | Leaf litter Decomposition Temperate forest |
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