瑞士阿尔卑斯山腐殖质形态与有机质分解

Q4 Agricultural and Biological Sciences International Journal of Plant Biology Pub Date : 2023-08-02 DOI:10.3390/ijpb14030054
Sarah Semeraro, Maud Fazzari, Pascal Kipf, S. Rasmann, R. Le Bayon
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引用次数: 0

摘要

腐殖质形态和有机质分解受气候、植物和土壤分解体的影响。然而,不同的腐殖质形式是否能在实验上与凋落物分解联系起来仍有待全面评估。为了评估腐殖质系统和有机物分解之间的联系,我们沿着海拔梯度在瑞士阿尔卑斯山的两个地区(瓦莱州和提契诺州)进行了北/南暴露设计。采用庞格小体积法量化了腐殖质形态的大比例类型,并测量了绿茶和路易波士茶在寄生系统和土壤系统中的分解情况。我们发现,土壤系统和副系统的分解速度不同,副系统的分解速度比土壤系统慢。我们还观察到,海拔和植被类型(即亚高山的森林和高山的草地)驱动腐殖质形式的分布,在提契诺州的高山和亚高山中发现了副系统,而在瓦莱州,只在亚高山的高山和Terrosystems中发现了副系统。然而,需要进一步分析以确定与腐殖质系统内分解过程变化最相关的其他变量,例如土壤分解者群落组成。
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Humus Forms and Organic Matter Decomposition in the Swiss Alps
Humus forms and organic matter decomposition are influenced by climate, plants and soil decomposers. Yet, whether different humus forms could be experimentally linked to litter decomposition has still to be fully assessed. To assess the link between humus systems and organic matter decomposition, we worked in two regions of the Swiss Alps (Valais and Ticino) along elevational gradients by following a north/south exposure design. We quantified humus forms macrorests proportion types by the Ponge small-volume method and measured the decomposition of green tea and rooibos tea within the Parasystems and Terrosystems. We found that Parasystems and Terrosystems differed in tea decomposition rates, with a slower decomposition in Parasystems than in Terrosystems. We also observed that elevation, and hence, vegetation type (i.e., forest in the subalpine versus grassland in the alpine), drove humus form distribution, with Parasystems found in the alpine and subalpine in Ticino, while in Valais Parasystems were only found in the alpine and Terrosystems in the subalpine levels. Further analyses are however needed to identify other variables that best correlate with variation in decomposition processes within humus systems, such as soil decomposer community composition.
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来源期刊
International Journal of Plant Biology
International Journal of Plant Biology Agricultural and Biological Sciences-Plant Science
CiteScore
2.00
自引率
0.00%
发文量
44
审稿时长
10 weeks
期刊介绍: The International Journal of Plant Biology is an Open Access, online-only, peer-reviewed journal that considers scientific papers in all different subdisciplines of plant biology, such as physiology, molecular biology, cell biology, development, genetics, systematics, ecology, evolution, ecophysiology, plant-microbe interactions, mycology and phytopathology.
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