Assessing the Effects of Solarization and Sodium Azide Amendments on Selected Soil Parameters, Enzyme Activities and Microbial PopulationsReportar como inadecuado




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Soil borne pathogens result in seriouslosses in yield of crops grown in the United States US and various parts ofthe world. One of the most effective chemicals used to control these pathogenswas methyl bromide CH3Br, MeBr, a pre-plant fumigant with a broadspectrum of activity. Sodium azide has been proposed in combination withsolarization as a viable alternative to replace MeBr due to environmentalconcerns with respect to ozone depletion in the stratosphere and as a possiblecarcinogen. However, the possible impacts of sodium azide as a soil pollutantand its effect on soil biological processes have not been fully studied. Inthis study the effect of sodium azide used alone and in combination withsolarization and mulching on selected soil enzyme activitiesphosphomonoesterases, arylsulfatase and phosphodiesterase were assessed.Responses of arylsulfatase and phosphodiesterase to solarization and mulchingand azide treatment were found to be affected in the same way, suggesting asimilar mode of action. Soil pH in control soils was significantly increased byazide application; however, in mulched soils, pH was decreased. The significantdecrease in soil pH in mulched soils may be very important in explaining theincrease in the acid phosphatase activity observed in mulched soils. Overall,solarization and sodium azide treatment significantly reduced both fungi andbacterial populations but the responses among the various treatments variedsignificantly.

KEYWORDS

Sodium Azide; Solarization; Methyl Bromide; Soil Enzyme Activity; Microbial Populations

Cite this paper

A. Kumi, V. Khan and R. Ankumah -Assessing the Effects of Solarization and Sodium Azide Amendments on Selected Soil Parameters, Enzyme Activities and Microbial Populations,- Journal of Environmental Protection, Vol. 4 No. 8, 2013, pp. 772-778. doi: 10.4236-jep.2013.48090.





Autor: Anthony S. Kumi, Victor Khan, Ramble O. Ankumah

Fuente: http://www.scirp.org/



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