Size-dependent morphological and chemical property of fine root litter decomposition
Size-dependent morphological and chemical property of fine root litter decomposition
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DOI：
10.1007/s11104-015-2491-8
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发表时间：
2015-05
期刊：
影响因子：
4.9
通讯作者：
N. Makita;Ayumi Kawamura;A. Osawa
中科院分区：
文献类型：
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作者：
N. Makita;Ayumi Kawamura;A. Osawa
AimsTo估计细根凋落物分解速率的因果关系，直径达2 mm，我们探讨了质量损失率和基质凋落物性质的化学和形态dynamic. Methods之间的关系质量损失，氮（N）浓度，比根面积（SRA），根组织密度（RTD），测定了温带森林中锯齿栎（Quercus serrata）和长梗冬青（Ilex pedunculosa）两个直径级（<0.5和0.5-2 mm）的初始细根和残余细根的剩余比例。分解后1个月，然后每3个月，27 month.ResultsN浓度动态分解过程中的物种和直径之间的相互作用表现出显着的垃圾袋依次收集，有较大的收敛直径类forQ。塞拉坦for I.有花梗的两个直径的剩余面积和体积在两个物种的分解过程中发生了变化，但变化的程度有所不同的物种之间。剩余的表面积和体积以I.有柄根的直径级间差异大于Q. serrataroots。剩余质量与剩余的C浓度和表面积呈正相关，与剩余的组织体积和N浓度呈负相关，根据主成分分析analysis.ConclusionsDifferences在形态和化学性质之间的直径大小的两个物种可以表明分解过程的差异。细根分解率的估计最好通过生物和物理化学物种特异性过程的组合来获得。
AimsTo estimate cause-and-effect relationships of decomposition rates of fine root litter up to 2 mm in diameter, we explored the relationships between mass loss rates and substrate litter properties with respect to chemical and morphological dynamics.MethodsMass loss, nitrogen (N) concentration, specific root area (SRA), root tissue density (RTD), and their remaining proportions were measured for initial and residual fine roots of two diameter classes (<0.5 and 0.5–2 mm) ofQuercus serrataandIlex pedunculosain a temperate forest. Litterbags were sequentially collected after 1 month of decomposition and then every 3 months for 27 months.ResultsN concentration dynamics during decomposition showed a significant interaction between species and diameter, and there was a greater convergence between diameter classes forQ. serratathan forI. pedunculosa. The remaining area and volume of the two diameters changed during decomposition in both species, but the degree of change was somewhat different between the species. The remaining surface area and volume inI. pedunculosaroots showed greater differences between diameter classes compared withQ. serrataroots. Remaining mass was positively correlated with the remaining C concentration and surface area and was negatively correlated with the remaining tissue volume and N concentration, according to principal component analysis analysis.ConclusionsDifferences in morphological and chemical properties between diameter sizes of two species could indicate differences in decomposition processes. Estimates of fine root decomposition rates are best obtained by a combination of biological and physicochemical species-specific processes.