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Soil Organic Nitrogen Indirectly Enhances Pepper-Residue-Mediated Soil Disease Suppression through Manipulation of Soil Microbiome

文献类型： 外文期刊

作者： Hong, Shan 1 ; Jv, Hongling 2 ; Yuan, Xianfu 4 ; Geng, Jianjian 2 ; Wang, Beibei 2 ; Zhao, Yan 2 ; Wang, Qing 2 ; Li, Rong 4 ; Jia, Zhongjun 2 ; Ruan, Yunze 2 ;

作者机构： 1.Hainan Acad Agr Sci, Inst Vegetables, Hainan Key Lab Vegetable Biol, Haikou 570228, Hainan, Peoples R China

2.Hainan Univ, Sanya Nanfan Res Inst, Sanya 572025, Peoples R China

3.Chinese Acad Trop Agr Sci, Spice & Beverage Res Inst, Key Lab Genet Improvement & Qual Regulat Trop Spi, Wanning 571533, Peoples R China

4.Nanjing Agr Univ, Jiangsu Prov Key Lab Solid Organ Waste Utilizat, Jiangsu Collaborat Innovat Ctr Solid Organ Wastes, Educ Minist,Engn Ctr Resource Saving Fertilizers, Nanjing 210095, Peoples R China

5.Chinese Acad Sci, Inst Soil Sci, State Key Lab Soil & Sustainable Agr, Nanjing 210008, Peoples R China

关键词： conducive soil; suppressive soil; plant residue; Fusarium wilt disease; culturable microbes; alkali-hydrolyzable nitrogen

期刊名称：AGRONOMY-BASEL （ 影响因子：3.949； 五年影响因子：4.117 ）

ISSN：

年卷期： 2022 年 12 卷 9 期

页码：

收录情况： SCI

摘要： Banana Fusarium wilt-suppressive soils are effective against pathogen invasion, yet soil physicochemical factors responsible for conducive or suppressive behavior have not been reported. Here, we investigated the changes in banana biomass, disease incidence (DI), soil culturable microbes and physicochemical properties by incorporating pepper and banana residues into conducive and suppressive soils. Before the incorporation of any residues, the suppressive soil significantly increased banana biomass and decreased DI compared to the conducive soil. The biomass of the suppressive soil was significantly higher than that of the conducive soil after the incorporation of either pepper or banana residues. Compared with the control (CK), the incorporation of pepper residues to both soils significantly reduced DI, while banana residues had the opposite effect. Additionally, both conducive and suppressive soils supplemented with pepper residues significantly reduced the amounts of culturable Fusarium oxysporum and increased the amounts of beneficial Pseudomonas and Bacillus. The pepper residue extracts significantly inhibited the growth of F. oxysporum mycelium. Soil alkali-hydrolyzable nitrogen (AN) responded most strongly to residue application to suppressive soil. The AN factor was significantly and positively correlated with banana biomass; however, there was no direct and significant negative correlation with DI. Further analysis of the results showed that elevated AN content could stimulate the amounts of culturable Bacillus in the soil, and Bacillus antagonized the proliferation of pathogen and thus indirectly and effectively reduced banana DI. In conclusion, soil AN content can indirectly improve the disease suppression ability of pepper-residue-mediated suppressive soil by manipulating the soil microbiome.

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