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首页> 外文期刊>Soil Biology & Biochemistry >Particle size alters litter diversity effects on decomposition
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Particle size alters litter diversity effects on decomposition

机译:粒径改变垃圾分类对分解的影响

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摘要

Nutrient transfer between decomposing leaves may explain non-additive species diversity effects on decomposition. The influence of the diversity of litter species on decomposition was compared in mixtures composed of large (>200 mm super(2)) or small (<9 mm super(2)) litter fragments. The increase in the number of species (aspen, oak, alder and pine, from monocultures to four species in all possible combinations) initially (at day 43) suppressed respiration, but eventually (after 142 days) did not affect the mass loss of the mixtures of small litter fragments. In contrast, the decomposition of litter in large fragments increased with increased diversity, and 93% of all mixtures decomposed faster than would be predicted from monocultures. The results suggest that the active transport of nutrients by fungal hyphae, rather than passive diffusion, drives positive effect of the litter species diversity on decomposition.
机译:分解叶片之间的营养转移可能解释了非加性物种多样性对分解的影响。比较了由较大(> 200 mm super(2))或较小(<9mm super(2))垃圾碎片组成的混合物中垃圾种类多样性对分解的影响。最初(在第43天)物种数量(从单一栽培的树种,橡树,al木和松树的数量增加到所有可能的组合的四个物种)的抑制呼吸作用,但最终(142天后)并没有影响呼吸系统的质量损失。小垃圾碎片的混合物。相比之下,大碎片中凋落物的分解随着多样性的增加而增加,并且所有混合物中有93%的分解速度比单培养所预测的快。结果表明,真菌菌丝对养分的主动运输,而不是被动扩散,推动了凋落物物种多样性对分解的积极影响。

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