Sheep dung addition and reseeding promote ecosystem multifunctionality by mediating soil microbial network complexity in a subtropical grassland

IF 4.8 2区农林科学 Q1 SOIL SCIENCE

Applied Soil Ecology Pub Date : 2025-05-06 DOI:10.1016/j.apsoil.2025.106157

Debao Li , Haibian Xu , Yan Li , Jinghang Xu , Meiyan Zhang , Jianping Wu

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引用次数: 0

Abstract

Globally, grasslands experience varying degrees of degradation, and restoration approaches frequently employ reseeding and fertilization. Despite the widespread use of these practices, the effects of various modes of restoration on soil microbial network structure and diversity and how these factors affect ecosystem multifunctionality have not been fully elucidated. To improve understanding of these relationships, we conducted a 10-year long-term experiment investigating the effects of five restoration modes in a subtropical grassland: natural restoration, reseeding, annual sheep dung addition, reseeding plus biennial sheep dung addition, and reseeding plus annual sheep dung addition, with a severely degraded grassland serving as the control. We found that ecosystem multifunctionality and microbial network complexity and diversity were significantly higher in all restoration modes relative to the control. Sheep dung addition had stronger positive influence on ecosystem multifunctionality and microbial network complexity and diversity than natural restoration and reseeding. Soil microbial network complexity had stronger positive effects on ecosystem multifunctionality than microbial diversity. Importantly, we found that reseeding plus biennial sheep dung addition resulted in the strongest improvements to ecosystem multifunctionality and microbial network complexity and diversity. This research reveals that soil microbial network complexity is essential for ecosystem multifunctionality in subtropical grassland restoration efforts, and emphasizes the necessity of protecting and restoring complex soil microbial community in degraded grasslands.

查看原文本刊更多论文

添加羊粪和补种羊粪通过调节亚热带草原土壤微生物网络的复杂性来促进生态系统的多功能性

在全球范围内，草地经历了不同程度的退化，恢复方法通常采用补种和施肥。尽管这些做法被广泛使用，但各种恢复模式对土壤微生物网络结构和多样性的影响以及这些因素如何影响生态系统的多功能性尚未得到充分阐明。为了更好地理解这些关系，我们以一个严重退化的草地为对照，在10年的长期试验中，研究了亚热带草地自然恢复、补种、每年补加羊粪、补种+两年补加羊粪、补种+每年补加羊粪5种恢复模式的效果。结果表明，各恢复模式的生态系统多功能性、微生物网络复杂性和多样性均显著高于对照组。添加羊粪对生态系统多功能性、微生物网络复杂性和多样性的正向影响强于自然恢复和补播。土壤微生物网络复杂性对生态系统多功能性的正向影响强于微生物多样性。重要的是，我们发现补播加两年一次添加羊粪对生态系统多功能性和微生物网络复杂性和多样性的改善最为显著。研究表明，土壤微生物网络的复杂性是亚热带草地恢复中生态系统多功能性的关键，并强调了保护和恢复退化草地复杂土壤微生物群落的必要性。

本文章由计算机程序翻译，如有差异，请以英文原文为准。

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来源期刊

Applied Soil Ecology 农林科学-土壤科学

CiteScore

9.70

自引率

4.20%

发文量

363

审稿时长

5.3 months

期刊介绍： Applied Soil Ecology addresses the role of soil organisms and their interactions in relation to: sustainability and productivity, nutrient cycling and other soil processes, the maintenance of soil functions, the impact of human activities on soil ecosystems and bio(techno)logical control of soil-inhabiting pests, diseases and weeds.