Crop rotations reduce pathogenic fungi compared to continuous cropping

文献类型： 外文期刊

第一作者： Dou, Yanhui

作者： Dou, Yanhui;Liu, Song;Cui, Tingting;Huang, Rongyan;Wang, Yushu;Li, Xinyuan;Wang, Junqiang;Tan, Kefei;Yu, Shuting

作者机构：

关键词： Rhizosphere; Soil fungi; Crop rotation; Continuous cropping; Root pathogens

期刊名称：RHIZOSPHERE （ 影响因子：3.5； 五年影响因子：3.7 ）

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年卷期： 2025 年 34 卷

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收录情况： SCI

摘要： Diverging from prior saline-alkali ecosystem studies, this investigation examines fungal communities in carbonate chernozem, a cold-temperate pedological system, under contrasting maize-soybean cropping regimes. Soil microbial communities are critically shaped by management practices, particularly crop rotation and continuous cropping, through their impacts on soil nutrients and pathogen dynamics. Although maize and soybean dominate Heilongjiang agriculture, fungal community responses to cropping systems in semi-arid carbonate chernozem soils remain understudied. Using high-throughput sequencing, we analyzed rhizosphere fungal diversity, abundance, and composition across four systems: continuous soybean (CS), continuous maize (CM), soybean-maize-soybean rotation (RS), and maize-soybean-maize rotation (RM). The results indicated that crop rotation decreased fungal diversity and RM enhancing the abundance of various fungal genera compared to CM. Crop rotation altered the relative abundance of beneficial fungi, such as Humicola and Schizothecium, whereas continuous cropping increased pathogenic fungi such as Gibberella, Dactylonectria, and Neocosmospora. The results of Principal Coordination Analysis (PCoA) show that the composition of fungal communities varies significantly in different planting systems, emphasizing the unique structures influenced by these methods. Multifunctional fungi exhibited significant relationships with these soil properties, while pathogenic fungi such as Gibberella and Plectosphaerella were correlated with TN and SOC, respectively. Total nitrogen (TN) significantly affected fungal community structure, correlating strongly with continuous cropping, while crop rotation was correlated with available phosphorus (AP), soil organic carbon (SOC), and available nitrogen (AN). This study revealed the mechanisms by which cropping systems regulate functional microbial communities through soil nutrient alterations, providing actionable strategies for optimizing rotations to suppress pathogens and enhance soil resilience in temperate carbonate agroecosystems.

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