蚯蚓对土壤有机物质矿化和稳定的作用如何受到垃圾质量和土壤发育阶段的影响

IF 3.9 3区 环境科学与生态学 Q2 ENVIRONMENTAL SCIENCES
Saliha Irshad, Jan Frouz
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引用次数: 0

摘要

在全球范围内,土壤动物消耗了每年约一半的落叶。一个重要的问题是,这种活动如何影响土壤有机物质的矿化和稳定。在此,我们探讨了蚯蚓在不同土壤发育阶段(不同土壤年龄)对提供不同质量垃圾的土壤中的垃圾分解和有机物稳定的影响程度。实验室介观模型由废弃物和矿物质层组成。矿质土壤来自生长在采矿后土壤(经过约 50 年土壤发展的年轻土壤)上的云杉和桤木林,或来自采矿后地点附近的土壤(经过数千年土壤发展的成熟土壤),矿质土壤由匹配的凋落物提供,介观模型中要么没有蚯蚓,要么有两条蚯蚓。蚯蚓效应与树木和土壤年龄之间存在统计学意义上的显著交互作用:蚯蚓增加了桤木土壤的呼吸作用,但只增加了云杉成熟土壤的呼吸作用,而年轻土壤的情况则相反。总的来说,蚯蚓促进了土壤表面垃圾的清除和矿质土壤中碳的积累。蚯蚓促进了矿物相关有机物(MAOM)中的碳储存,尤其是在云杉幼土中。研究结果表明,蚯蚓在远未达到饱和的幼龄土壤(采矿后土壤上的云杉)中的活动可通过促进与矿物相关的有机质中的碳储存来促进土壤固碳,而在成熟、碳饱和的土壤中,蚯蚓则倾向于促进土壤呼吸。更广泛地说,蚯蚓对土壤的影响取决于土壤碳饱和的阶段。
本文章由计算机程序翻译,如有差异,请以英文原文为准。

How the effect of earthworms on soil organic matter mineralization and stabilization is affected by litter quality and stage of soil development

How the effect of earthworms on soil organic matter mineralization and stabilization is affected by litter quality and stage of soil development

Globally soil fauna consumes about half of the annual litter fall. An important question is how this activity affects the mineralization and stabilization of soil organic matter. Here we explore how much earthworms influence the decomposition of litter and the stabilization of organic matter in soils at various stages of soil development (various soil age) that are supplied with litter of various quality. The laboratory mesocosms consist of litter and a mineral layer. The mineral soils originated either from spruce and alder stands growing either on post-mining soils (young soils after about 50 years of soil development) or from soils in the close vicinity of post-mining sites (mature soils with several thousand years of soil development), the mineral soils were supplied by matching litter, the mesocosms were either without earthworms or with two individuals of earthworms. The earthworm effect showed statistically significant interaction with tree and soil age: earthworms increased respiration in both alder soils, but in spruce soils only in mature soil, while the opposite was true for young soils. In general, earthworms promoted the removal of litter from the soil surface and carbon accumulation in the mineral soil. Earthworms promoted C storage in mineral associated organic matter (MAOM), especially in young spruce soils. The results suggested that earthworm activity in young soils which were far from saturation (spruce on post-mining soils) promotes soil C sequestration by promoting C storage in MAOM, whereas earthworms in mature, C saturated soils tend to promote soil respiration. More broadly, earthworms effect on soil depends on stage of soil C saturation.

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来源期刊
Biogeochemistry
Biogeochemistry 环境科学-地球科学综合
CiteScore
7.10
自引率
5.00%
发文量
112
审稿时长
3.2 months
期刊介绍: Biogeochemistry publishes original and synthetic papers dealing with biotic controls on the chemistry of the environment, or with the geochemical control of the structure and function of ecosystems. Cycles are considered, either of individual elements or of specific classes of natural or anthropogenic compounds in ecosystems. Particular emphasis is given to coupled interactions of element cycles. The journal spans from the molecular to global scales to elucidate the mechanisms driving patterns in biogeochemical cycles through space and time. Studies on both natural and artificial ecosystems are published when they contribute to a general understanding of biogeochemistry.
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