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Method and device for killing bacteria in soil

A kind of soil and bacteria technology, applied in the device, application, animal husbandry, etc. of catching or killing insects, can solve the problem of few researches on soil sterilization, and achieve the effect of reducing damage and improving quality

Inactive Publication Date: 2019-10-08
INST OF AGRI ENVIRONMENT & RESOURCES YUNNAN ACAD OF AGRI SCI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0010] Microwave sterilization is mainly used for food, and there is little research on soil sterilization

Method used

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  • Method and device for killing bacteria in soil

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Experimental program
Comparison scheme
Effect test

Embodiment 1

[0059] A 915MHz microwave device was used to sterilize a soil sample of 50 cm (length) × 35 cm (width) × 20 cm (thickness) of tobacco seedling culture soil. The number of bacterial wilt bacteria in soil before treatment was 6.15×10 6 cfu / g, after 60 seconds of microwave irradiation, the number of bacterial wilt bacteria in soil samples was reduced to 3.81×10 6 cfu / g. For soil samples treated with microwave radiation and soil samples not treated with microwave radiation, the results of the 40-day and 60-day tobacco seedling cultivation experiments were as follows: the disease index of bacterial wilt disease of tobacco seedlings cultivated with microwave-treated soil samples was 4.18 and 16.37, respectively. ; The disease index of bacterial wilt disease of tobacco seedlings cultivated in soil samples without microwave treatment was 17.63 and 24.52 respectively (control).

Embodiment 2

[0061] A 1500MHz microwave device was used to sterilize the soil samples of tobacco seedling culture soil of 50cm (length) × 35cm (width) × 20cm (thickness). The number of bacterial wilt bacteria in soil before treatment was 6.15×10 6 cfu / g, after 60 seconds of microwave irradiation, the number of bacterial wilt bacteria in soil samples was reduced to 2.67×10 6 cfu / g. For soil samples treated with microwave radiation and soil samples not treated with microwave radiation, the results of the 40-day and 60-day tobacco seedling cultivation experiments were as follows: the disease index of bacterial wilt disease of tobacco seedlings cultivated with microwave-treated soil samples was 3.26 and 10.31, respectively. ; The disease index of bacterial wilt disease of tobacco seedlings cultivated in soil samples without microwave treatment was 14.23 and 26.81 respectively (control).

Embodiment 3

[0063] A 2000MHz microwave device was used to sterilize the soil samples of tobacco seedling culture soil 50cm (length) × 35cm (width) × 20cm (thickness). The number of bacterial wilt bacteria in soil before treatment was 6.15×10 6 cfu / g, after 60 seconds of microwave irradiation, the number of bacterial wilt bacteria in soil samples was reduced to 2.16×10 6 cfu / g. For soil samples treated with microwave radiation and soil samples not treated with microwave radiation, the results of the tobacco seedling cultivation test for 40 days and 60 days were as follows: the disease index of bacterial wilt disease of tobacco seedlings cultivated with microwave-treated soil samples was 2.53 and 7.23, respectively. ; The disease index of bacterial wilt disease of tobacco seedlings cultivated in soil samples without microwave treatment was 13.34 and 27.92 respectively (control).

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Abstract

The invention relates to a method and device for killing bacteria in soil and relates to a method for killing bacteria in soil, where soil bearing bacteria is irradiated with microwave in a frequency range of 2000+ / -100 MHz. The invention also relates to a microwave sterilizing device, comprising a conveyer, a conveying tunnel and a microwave generator, wherein the conveyer passes through the conveying tunnel and the microwave generator is disposed in the conveying tunnel; the microwave generator is in a microwave frequency range of 2000+ / -100 MHz. The method prevents the problems: the use of chemical pesticides in controlling disease damage leads to residue of chemical pesticides in soil and in plants.

Description

technical field [0001] The invention relates to the field of agricultural sterilization, in particular to a method and device for killing bacteria in soil. Background technique [0002] Tobacco bacterial wilt is one of the main diseases of tobacco in tropical and subtropical regions. It is currently widespread in the Yangtze River Basin and the tobacco areas south of China, including Guangdong, Fujian, Hunan, Jiangxi, eastern Guangxi, southern Anhui, Sichuan and parts of Guizhou. Tobacco areas are seriously damaged, and outbreaks often occur in individual years, resulting in devastating losses. In recent years, the incidence and damage range of the disease have tended to expand to the northern tobacco areas, and occurred in Shandong, Henan, Shaanxi, Liaoning and other provinces, and the damage in some areas was heavier. At present, the loss caused by the disease ranks fourth among all kinds of diseases. [0003] The typical symptom of tobacco wilt is leaf wilt. At the beg...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): A01M17/00
Inventor 李家瑞杨群辉尚慧马云萍杨佩文肖志新胡志明
Owner INST OF AGRI ENVIRONMENT & RESOURCES YUNNAN ACAD OF AGRI SCI