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作 者 ：郭继勋,祝廷成

期 刊 ：生态学报 1992年 12卷 4期 页码：295~301

关键词：枯枝落叶；分解速率；损失率；羊草草原；

Keywords:litter, decomposition rate, lost rate, Leymus chinensis grassland.,

摘 要 ：分解速率和损失率从不同侧面反映了枯枝落叶分解动态。羊草草原主要优势植物,羊草(Leymus chinensis)、拂子茅(Calamagrostis epigejos),碱蓬(Suaeda glauca)、碱茅(Puccinellia tenuiflora)、五脉山黎豆(Lathyrus quinquenervius)、碱蒿(Artemisia anethifolia)分解速率的季节变化动态近似倒“V”字型。损失率的季节变化呈“S”型,反映了枯枝落叶的失重情况。枯枝落叶的化学组成成分是造成不同种植物间分解差异的主要原因,特别是C/N比与分解快慢有密切关系。分解初期,枯枝落叶的损失符合指数衰减模型。枯枝落叶损失95％所需时间,羊草群落约为8.8a,杂类草群落约为9.7a,碱茅群落约为7.1a,碱蓬群落约为4.7a。

Abstract:Decomposition rate and lost rate reflected the dynamics of litter decomposition from different aspects. The seasonal change in the decomposition rates of Leymus chinensis, Calamagrostis epigejos, Suaeda glauca, Puccine-llia tenuiflora, Lathyrus guinguenervius and Artemisia anethifolia in Leymus chinensis grassland assumed similar inverse "V" type. The seasonal change in their lost rates assumed "S" type which reflected the dynamics of litter loss. The chemical composition of litter was the main reason which...

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