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首页> 外文期刊>Plant and Soil >Soil nutrient patchiness and plant genotypes interact on the productionTI Soil nutrient patchiness and plant genotypes interact on the production potential and decomposition of root and shoot litter: evidence from short-term laboratory experiments with Triticum aestivum
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Soil nutrient patchiness and plant genotypes interact on the productionTI Soil nutrient patchiness and plant genotypes interact on the production potential and decomposition of root and shoot litter: evidence from short-term laboratory experiments with Triticum aestivum

机译：土壤养分斑块和植物基因型在生产上相互影响TI土壤养分斑块和植物基因型在生产潜力和根与芽凋落物的相互作用上相互作用：来自小麦的短期实验室试验的证据

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Aims The purpose of this study was to test the hypotheses that soil nutrient patchiness can differentially benefit the decomposition of root and shoot litters and that this facilitation depends on plant genotypes. Methods We grew 15 cultivars (i.e. genotypes) of winter wheat (Triticum aestivum L.) under uniform and patchy soil nutrients, and contrasted their biomass and the subsequent mass, carbon (C) and nitrogen (N) dynamics of their root and shoot litters. Results Under equal amounts of nutrients, patchy distribution increased root biomass and had no effects on shoot biomass and C: N ratios of roots and shoots. Roots and shoots decomposed more rapidly in patchy nutrients than in uniform nutrients, and reductions in root and shoot C: N ratios with decomposition were greater in patchy nutrients than uniform nutrients. Soil nutrient patchiness facilitated shoot decomposition more than root decomposition. The changes in C:N ratios with decomposition were correlated with initial C: N ratios of litter, regardless of roots or shoots. Litter potential yield, quality and decomposition were also affected by T. aestivum cultivars and their interactions with nutrient patchiness. Conclusions Soil nutrient patchiness can enhance C and N cycling and this effect depends strongly on genotypes of T. aestivum. Soil nutrient heterogeneity in plant communities also can enhance diversity in litter decomposition and associated biochemical and biological dynamics in the soil.
机译：目的本研究的目的是检验以下假设：土壤养分斑块可不同程度地有利于根和芽凋落物的分解，而这种促进取决于植物的基因型。方法我们在均匀，多斑点的土壤养分下培育了15个冬小麦品种（即基因型），并对比了它们的生物量以及随后的根和凋落物的质量，碳（C）和氮（N）动态。 。结果在等量养分的情况下，斑块状分布增加了根的生物量，而对茎生物量和根与茎的碳氮比没有影响。斑块状养分中的根和芽的分解比均匀养分中的分解更快，而斑块状养分中根与芽的C：N比率随分解的降低比均匀养分更大。土壤养分斑块比根部分解更能促进枝条分解。分解的C：N比值​​的变化与垫料的初始C：N比值​​相关，而与根或芽无关。小麦的栽培品种及其与养分斑块的相互作用也影响了凋落物的潜在产量，品质和分解。结论土壤养分斑块可促进碳和氮循环，这种效应在很大程度上取决于小麦的基因型。植物群落中土壤养分的异质性还可以提高凋落物分解的多样性以及土壤中相关的生化和生物动力学。

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