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2024 Volume 3 Issue 1
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DAI Yuhao, YANG Liang, XIAO Qingju, et al. Effects of Different Soil Disinfection Methods on Tobacco Bacterial Wilt and Rhizosphere Microbial Community[J]. PLANT HEALTH AND MEDICINE, 2024, (1): 33-44. doi: 10.13718/j.cnki.zwyx.2024.01.004
Citation: DAI Yuhao, YANG Liang, XIAO Qingju, et al. Effects of Different Soil Disinfection Methods on Tobacco Bacterial Wilt and Rhizosphere Microbial Community[J]. PLANT HEALTH AND MEDICINE, 2024, (1): 33-44. doi: 10.13718/j.cnki.zwyx.2024.01.004
shu

Effects of Different Soil Disinfection Methods on Tobacco Bacterial Wilt and Rhizosphere Microbial Community

  • 1. College of Plant Protection, Southwest University, Chongqing 400715, China;

  • 2. Chongqing Tobacco Company, Chongqing 400023, China

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  • Received Date: 15/12/2023

  • MSC: S432.4

  • In order to clarify the control effect of different soil disinfection methods on tobacco bacterial wilt, explore the application technology and value of different disinfection methods in production, and analyze the microecological effect of different disinfection methods on soil, in this paper, the effects of different soil disinfection methods on the occurrence of flue-cured tobacco bacterial wilt and rhizosphere microorganisms were investigated through field plot experiments. The results showed that the disease index and incidence of DMTT and TA treatments were significantly lower than that of control during the whole adjustment period. The results also showed that the relative prevention effectiveness was 47.76% and 37.06%. At the same time, CC, DMTT and TA treatments significantly reduced the content of solanacardia in tobacco rhizosphere soil. DMTT, CCA and TA all reduced the diversity and richness of bacterial and fungal communities to a certain extent. Compared with the control group, the relative proportion of Proteobacteria in each treatment decreased, with the most decreasing in DMTT, which reached 28.14%. Secondly, the relative proportion of Firmicutes in rhizosphere soil increased after soil disinfection. In the rhizosphere soil of tobacco, the relative abundance of solanacearia showed a very significant positive correlation with Solicoccozya, and the correlation coefficient was 0.85 (p<0.001). All the four soil disinfectants reduced the relative abundance of Solicoccozya, among which, DMTT reduced the most (98.00%) and TA reduced 52.82%. In summary, the soil disinfection treatment with dazomet and trichloroisocyanuric acid can effectively reduce the number of pathogenic bacteria related microorganisms, optimize the soil micro-ecological environment, and curb the occurrence of tobacco bacterial wilt, which can be applied in production in some areas.
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Effects of Different Soil Disinfection Methods on Tobacco Bacterial Wilt and Rhizosphere Microbial Community

  • Received Date: 15/12/2023

Abstract: In order to clarify the control effect of different soil disinfection methods on tobacco bacterial wilt, explore the application technology and value of different disinfection methods in production, and analyze the microecological effect of different disinfection methods on soil, in this paper, the effects of different soil disinfection methods on the occurrence of flue-cured tobacco bacterial wilt and rhizosphere microorganisms were investigated through field plot experiments. The results showed that the disease index and incidence of DMTT and TA treatments were significantly lower than that of control during the whole adjustment period. The results also showed that the relative prevention effectiveness was 47.76% and 37.06%. At the same time, CC, DMTT and TA treatments significantly reduced the content of solanacardia in tobacco rhizosphere soil. DMTT, CCA and TA all reduced the diversity and richness of bacterial and fungal communities to a certain extent. Compared with the control group, the relative proportion of Proteobacteria in each treatment decreased, with the most decreasing in DMTT, which reached 28.14%. Secondly, the relative proportion of Firmicutes in rhizosphere soil increased after soil disinfection. In the rhizosphere soil of tobacco, the relative abundance of solanacearia showed a very significant positive correlation with Solicoccozya, and the correlation coefficient was 0.85 (p<0.001). All the four soil disinfectants reduced the relative abundance of Solicoccozya, among which, DMTT reduced the most (98.00%) and TA reduced 52.82%. In summary, the soil disinfection treatment with dazomet and trichloroisocyanuric acid can effectively reduce the number of pathogenic bacteria related microorganisms, optimize the soil micro-ecological environment, and curb the occurrence of tobacco bacterial wilt, which can be applied in production in some areas.

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