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首页> 外文期刊>Journal of Nematology, with Annual of Applied Nematology >Reduction of Root-Knot Nematode, Meloidogyne javanica, and Ozone Mass Transfer in Soil Treated with Ozone
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Reduction of Root-Knot Nematode, Meloidogyne javanica, and Ozone Mass Transfer in Soil Treated with Ozone

机译：臭氧处理后土壤中根结线虫，爪蟾和线虫的传质减少

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摘要

Ozone gas (03) is a reactive oxidizing agent with biocidal properties. Because of the current phasing out of methyl bromide, investigations on the use of ozone gas as a soil-fumigant were conducted. Ozone gas was produced at a concentration of 1 % inair by a conventional electrical discharge 03 generator. Two 03 dosages and three gas flow rates were tested on a sandy loam soil collected from a tomato field that had a resident population of root knot nematodes, Meloidogyne javanica. At dosages equivalent to 50 and 250 kg of 03/ha, M. javanica were reduced by 24% and 68%, and free4iving nematodes by 19% and 52%, respectively. The reduction for both M. javanica and free-living nematodes was dosage dependent and flow rate independent. The rates of 03 mass transfer (OMT) through three soils of different texture were greater at low and high moisture levels than at intermediate ones. At any one soil moisture level, the OMT rate varied with soil texture and soil organic matter content. Results suggest that soil texture, moisture, and organic matter content should be considered in determining 03 dosage needed for effective nematode control.
机译：臭氧气体（03）是具有杀菌特性的反应性氧化剂。由于目前正在逐步淘汰甲基溴，因此对使用臭氧气体作为土壤熏蒸剂进行了研究。通过传统的放电03发生器，臭氧气体在空气中的浓度为1％。在从土壤田中有根结线虫（Meloidogyne javanica）常驻种群的番茄田收集的沙壤土上测试了两种03剂量和三种气体流速。在相当于50和250千克03 / ha的剂量下，爪哇爪哇线虫分别减少了24％和68％，游离线虫分别减少了19％和52％。爪哇线虫和自由生活线虫的减少均与剂量有关且与流速无关。在水分含量高和低的情况下，通过三种质地不同的土壤的03传质（OMT）速率要高于中间水分。在任何一种土壤水分水平下，OMT速率均随土壤质地和土壤有机质含量而变化。结果表明，在确定有效控制线虫所需的03剂量时，应考虑土壤质地，水分和有机质含量。

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