|Table of Contents|

Effect of Soil Disinfection Combined With Microbial Agents on Control of Eggplant Verticillium Wilt and Its Relationship to Rhizosphere Fungi Community Structure

《北方园艺》[ISSN:1001-0009/CN:23-1247/S]

Issue:
2020年07
Page:
27-35
Research Field:
Publishing date:

Info

Title:
Effect of Soil Disinfection Combined With Microbial Agents on Control of Eggplant Verticillium Wilt and Its Relationship to Rhizosphere Fungi Community Structure
Author(s):
ZHANG Chunyi1; QU Hongyun2; SANG Ping1; MU Yao1; WU Haolei1; LI Shumin1
(1.College of Resources and Environment,Northeast Agricultural University,Harbin,Heilongjiang 150030；2.Gardening Branch,Heilongjiang Academy of Agricultural Sciences,Harbin,Heilongjiang 150069)
Keywords:
continuous cropping eggplant; soil disinfection; Bacillus subtilis; fungi diversity
PACS:
-
DOI:
10.11937/bfyy.20193183
Abstract:
The effects of different soil disinfection methods on soil microbial community structure and the number of pathogens of verticillium wilt in rhizosphere soil of continuous cropping eggplant were studied by field microarea experiment and high throughput sequencing technique.It provided scientific basis and theoretical guidance for green prevention and control of eggplant continuous cropping obstacles.The results showed that biological fumigation combined with Bacillus subtilis treatment (BB) significantly decreased fungi diversity index,which including Ace,Chao and Shannon index,which was 23.29%,19.78% and 42.71% lower than that of continuous cropping eggplant treatment (CK),respectively.There was no significant difference in Ace and Chao index between (BF) treatment and BB treatment.Compared with CK,the number of pathogens and disease index of verticillium wilt treated with BB decreased by 97.2% and 51.6%,respectively.But there was no significant difference compared with Bacillus subtilis treatment (BS).There was a significant positive correlation between fungi diversity and the number of verticillium wilt pathogens in eggplant rhizosphere soil.Ascomycota was the main dominant bacteria,Which account for more than 50% in each treatment.Compared with CK treatment,BB treatment significantly increased the relative abundance of conjugated bacteria by 73.3%,and the relative abundance of Ascomycota and Basidiomycota decreased by 33.6% and 61.1%,respectively.After biological fumigation combined with Bacillus subtilis sterilized soil,the relative abundance of unclassified_f_Chaetomiaceae，Mortierella and other beneficial bacteria increased,while the relative abundance of Fusarium,Madurella and other diseased soil-borne pathogenic bacteria decreased.Biological fumigation combined with Bacillus subtilis could reduce fungi diversity,increase the abundance of beneficial bacteria in soil,improve soil ecology,reduce the number of pathogenic bacteria of soil verticillium wilt,and effectively prevent and control the occurrence of eggplant verticillium wilt.

References:

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Last Update: 2020-07-03