Deciphering Characteristics of Bacterial Diversity and Potential Function in Acidic Soils of Jiaodong Peninsula, China

IF 3.6 2区 农林科学 Q2 ENVIRONMENTAL SCIENCES
Fangxu Rong, Jing Liu, Guoqin Hou, Guizhen Wang, Mingyue Li, Kai Liu, Zafran Gul Wazir, Hongliang Liu, Aiju Liu, Yuzhi Xu
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Abstract

Soil acidification globally stressed agricultural production and food security. Jiaodong Peninsula, an important agricultural area of China, is also experiencing a serious soil acidity problem. However, There is limited knowledge regarding the differences of microbial diversity and functions in acidic soils in relation to land uses. Here, bacterial diversity and functions were compared between orchard and farmland soils of the Jiaodong region, in addition to soil progressive acidification. The results demonstrated that compared to farmland soils (pH is 5.36 average), orchard soils with an average pH of 4.70 faced a more serious acidic problem, which were characterized by lower nitrogen availability and a higher total phosphorus content. Yet, no significant differences were found in bacterial community diversity and taxa composition between the two landuse soils. While, the specific predominant taxa, such as Proteobacteria, Actinobacteriota, Acidobacteriota, were more abundant in orchard soils than in farmland soils. Similarly, for most network parameters (such as node, edge, modularity), the higher values were gotten in orchard soils than farmland soils. By contrast, the progressive acidification of soil had a more significant impact on the structure and diversity of the bacterial community. The further statistical analysis indicated that except of soil pH, soil total phosphorus and nitrogen availability were also top factors shaping the bacterial communities' interaction. Based on predicted functional profiles, the function gene related to amino acid metabolism was higher enrichment in farmland soils than orchard soils, which was similar to most different functional categories between both soils except of amino acid transport and metabolism. Our results suggest that compared to soil pH controlling bacterial community structure and diversity, agricultural practices related to land use might regulate microbial activities involved in nutrients cycle in acidic soils of Jiaodong Peninsula.

胶东半岛酸性土壤细菌多样性特征及其潜在功能
全球土壤酸化对农业生产和粮食安全造成了严重影响。胶东半岛作为中国重要的农业区,也面临着严重的土壤酸性问题。然而,关于酸性土壤中微生物多样性和功能的差异与土地利用的关系的知识有限。本文比较了胶东地区果园土壤和农田土壤的细菌多样性和功能,并对土壤的渐进酸化进行了比较。结果表明:与平均pH为5.36的农田土壤相比,平均pH为4.70的果园土壤酸性问题更为严重,表现为氮有效度较低,全磷含量较高;但两种土地利用方式土壤的细菌群落多样性和分类群组成差异不显著。而在果园土壤中,变形菌门、放线菌门、酸杆菌门等特定优势菌群的数量明显多于农田土壤。同样,对于大多数网络参数(如节点、边缘、模块化),果园土壤的值高于农田土壤。土壤逐渐酸化对细菌群落结构和多样性的影响更为显著。进一步的统计分析表明,除土壤pH外,土壤全磷和氮有效性也是影响细菌群落相互作用的主要因素。根据预测的功能谱,农田土壤氨基酸代谢相关功能基因富集程度高于果园土壤,除氨基酸转运和代谢功能外,两种土壤氨基酸代谢相关功能基因的富集程度基本一致。研究结果表明,与土壤pH控制细菌群落结构和多样性相比,土地利用相关的农业实践可能调节胶东半岛酸性土壤中参与养分循环的微生物活动。
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来源期刊
Land Degradation & Development
Land Degradation & Development 农林科学-环境科学
CiteScore
7.70
自引率
8.50%
发文量
379
审稿时长
5.5 months
期刊介绍: Land Degradation & Development is an international journal which seeks to promote rational study of the recognition, monitoring, control and rehabilitation of degradation in terrestrial environments. The journal focuses on: - what land degradation is; - what causes land degradation; - the impacts of land degradation - the scale of land degradation; - the history, current status or future trends of land degradation; - avoidance, mitigation and control of land degradation; - remedial actions to rehabilitate or restore degraded land; - sustainable land management.
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