长期施氮可抑制真菌坏死团分解后期的碳和氮损失,这取决于坏死团的化学性质

IF 5.6 1区 环境科学与生态学 Q1 ECOLOGY
Lang C. DeLancey, Craig R. See, Katherine Heckman, Peter G. Kennedy, Sarah E. Hobbie
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引用次数: 0

摘要

真菌坏死块越来越被认为是土壤碳(C)和氮(N)循环的关键组成部分。然而,相对于植物组织而言,真菌坏死团分解过程中C和N的损失如何受到人为N添加和土壤C供应变化(例如通过改变根渗出和根际引发)等全球变化因素的影响,目前尚不清楚,研究也不足。为了解决这些问题,我们在美国明尼苏达州进行了为期一年的分解实验,在施用无机氮和/或不稳定碳施肥20年的四个林地中,对四种真菌坏死块进行了孵化。我们发现坏死团化学是真菌坏死团损失C和N的主要驱动因素,也是对施肥的反应。具体来说,N的添加抑制了后期分解,但这种作用在富含黑色素的坏死块中较弱,这与基于植物凋落物动力学的假设相反,即N的添加应该抑制更复杂的有机分子的分解。不稳定剂C的添加对尸块分解的早期和后期都没有影响。不同物种的坏死块释氮量也不同,通过回归控制质量损失差异后,缺氮坏死块释氮量更低。施氮量对腐尸块初始氮释放比例的影响相对较小,表明分解者对氮的需求是真菌腐尸块分解过程中氮损失的主要控制因素。合成。总之,我们的结果强调了真菌化学成分对森林土壤C和N循环的来世效应的重要性。此外,他们还证明,从这个关键库释放的C和N可以通过持续的人为N添加而减少。
本文章由计算机程序翻译,如有差异,请以英文原文为准。

Long-term nitrogen fertilization inhibits carbon and nitrogen loss during late-stage fungal necromass decomposition depending on necromass chemistry

Long-term nitrogen fertilization inhibits carbon and nitrogen loss during late-stage fungal necromass decomposition depending on necromass chemistry

Long-term nitrogen fertilization inhibits carbon and nitrogen loss during late-stage fungal necromass decomposition depending on necromass chemistry

Long-term nitrogen fertilization inhibits carbon and nitrogen loss during late-stage fungal necromass decomposition depending on necromass chemistry

Long-term nitrogen fertilization inhibits carbon and nitrogen loss during late-stage fungal necromass decomposition depending on necromass chemistry

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来源期刊
Journal of Ecology
Journal of Ecology 环境科学-生态学
CiteScore
10.90
自引率
5.50%
发文量
207
审稿时长
3.0 months
期刊介绍: Journal of Ecology publishes original research papers on all aspects of the ecology of plants (including algae), in both aquatic and terrestrial ecosystems. We do not publish papers concerned solely with cultivated plants and agricultural ecosystems. Studies of plant communities, populations or individual species are accepted, as well as studies of the interactions between plants and animals, fungi or bacteria, providing they focus on the ecology of the plants. We aim to bring important work using any ecological approach (including molecular techniques) to a wide international audience and therefore only publish papers with strong and ecological messages that advance our understanding of ecological principles.
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