Analysis of Soil Physical and Chemical Properties of Tobacco Bacterial Wilt Diseased Fields and Healthy Fields in Tobacco Area of Guizhou
- Received Date: 01/02/2023
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Key words:
- tobacco bacterial wilt /
- healthy soil /
- pathogenic soil /
- soil physicochemical property
Abstract: To clarify the physical and chemical properties of soils of tobacco bacterial wilt diseased fields and healthy fields in the honey-sweet aroma tobacco production region of Guizhou, the study was conducted to collect soil samples from tobacco region of Guizhou and test the physical and chemical properties in laboratory. The results showed that the pH, soil organic matter(SOM), available kalium(AK), exchangeable calcium and magnesium contents of healthy soils in the tobacco area of Guizhou were higher than those of diseased soils, and the contents of soil alkali-hydrolyzable nitrogen(SAN)(except Sinan) were lower than those of diseased soils. Among them, the pH of healthy soils from Wengan and Ziyun was significantly higher than that of diseased soils, and the SAN of diseased soils from Tianzhu, Tongzi, and Wengan were higher than that of healthy soils, while the SOM(except Tongzi), AP, and exchangeable calcium contents of healthy soils were significantly higher than those of diseased soils. There were no significant differences in effective phosphorus(AP) and exchangeable magnesium(except Tianzhu) between two soils. Overall, soil pH, exchange calcium, AK and SOM were associated with the occurrence of tobacco bacterial wilt, among which high SAN, soil acidity, AK, SOM and low exchange calcium were conducive to the occurrence of tobacco bacterial wilt.