Effect of application rate on fumigant degradation in five agricultural soils

Qin, Ruijun; Gao, Suduan; Ajwa, Husein A.; Hanson, Bradley D.

doi:10.1016/j.scitotenv.2015.09.062

Cited by 35 publications

(12 citation statements)

References 32 publications

(43 reference statements)

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“…The half‐life values of DMDS ranged from 0.75 to 7.88 days indicating that DMDS degradation rate was affected significantly by the soil type. These values were in general agreement with Qin et al (), who reported half‐life values of 2.2–5.0 days in a Hueneme sandy loam and Metz loamy sand soil at the application rate of 20 mg kg −1 at 25°C.…”

Section: Resultssupporting

confidence: 91%

“…Chellemi et al () showed that the half‐life of DMDS was short (1.0–1.6 days) when applied at 20 mg kg −1 at 25°C to Tifton Loamy Sand and Dothan Sandy Loam soil. However, Qin, Gao, Ajwa, and Hanson () observed a longer DMDS half‐life (2.2–5.0 days) when it was applied to a range of soil types. Relatively, little is known about how the physical and chemical properties of soil, such as texture, organic matter, and pH, affect DMDS degradation.…”

Section: Introductionmentioning

confidence: 99%

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Effects of soil type, temperature, moisture, application dose, fertilizer, and organic amendments on chemical properties and biodegradation of dimethyl disulfide in soil

et al. 2018

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Dimethyl disulfide (DMDS) is a potential alternative to methyl bromide for soil fumigation to control soil‐borne disease. Laboratory experiments were conducted to investigate the effects of combinations of soil and environmental factors of DMDS degradation in soil. The results showed that soil pH and soil organic matter content are the major factors influencing the degradation of DMDS in soil. Generally, DMDS degradation was significantly slower in acidic and high organic content soils. The degradation rate increased with temperature and water content. However, when the temperature exceeded 35°C, the degradation rate decreased, and when the soil water content was raised to 10%, the change in DMDS degradation was not significant in Fangshan soil. The degradation of DMDS in soil depended on the initial application rate. Degradation slowed down as the fumigant application rate increased. DMDS degradation in soil was restrained by the addition of organic matter to soil, and the effect was enhanced by increased dosage. DMDS degradation in soil was also restrained by the use of chemical fertilizers except when amended with sodium dihydrogen phosphate and sodium thiosulfate. The impact of fumigant application rates and chemical fertilizers on bacterial communities in soil was determined by 16S rRNA amplicon sequencing. The results showed that bacterial diversity was affected by different treatments. Our study provides useful information to evaluate environmental safety assessments of DMDS in soil.

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Section: Resultssupporting

confidence: 91%

Section: Introductionmentioning

confidence: 99%

Effects of soil type, temperature, moisture, application dose, fertilizer, and organic amendments on chemical properties and biodegradation of dimethyl disulfide in soil

et al. 2018

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“…However, the principles of DMDS emission reduction by biochar are not yet clear. A study by Chellemi showed that the half‐life of DMDS was short (1.0–1.6 days) when it was applied at 20 mg kg ‐1 at 25 °C in Tifton loamy sand and Dothan sandy loam soil; however, Qin observed longer half‐lives (2.2–5.0 days) in other soils . Aside from the above studies, there are few other published studies on the fate of DMDS in soil.…”

Section: Introductionmentioning

confidence: 95%

“…A study by Chellemi showed that the half-life of DMDS was short (1.0-1.6 days) when it was applied at 20 mg kg -1 at 25 ∘ C in Tifton loamy sand and Dothan sandy loam soil; however, Qin observed longer half-lives (2.2-5.0 days) in other soils. 27,28 Aside from the above studies, there are few other published studies on the fate of DMDS in soil. Thus, the objective of this study was to determine the degradation kinetics of DMDS in different soils and to evaluate the effect of a biochar amendment on the degradation of DMDS.…”

Section: Introductionmentioning

confidence: 99%

Degradation of dimethyl disulphide in soil with or without biochar amendment

Han

Yan

Cao

et al. 2017

Pest Management Science

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“…Soil fumigation is an important agronomic practice in the production of numerous high-value vegetable and fruit crops, but the use of chemical fumigants can lead to excessive atmospheric emissions (Qin et al, 2016). For instance, 1,3-dichloropropene (1,3-D) is a major chemical soil fumigant replacing the banned methyl bromide (MeBr), which is a broad-spectrum fumigant.…”

Section: Introductionmentioning

confidence: 99%