The effect of simazine on nitrification and the decomposition of simazine by soil microorganisms

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dc.contributor.authorFarmer, Franklin Harrisen
dc.contributor.departmentBacteriologyen
dc.date.accessioned2017-01-30T21:03:19Zen
dc.date.available2017-01-30T21:03:19Zen
dc.date.issued1965en
dc.description.abstractThe herbicide simazine (2-chloro-4,6-bis(ethylamino)- 1,3,5-triazine) was found to have an inhibitory effect on nitrification in pure and mixed cultures of the nitrifying bacteria. Simazine concentrations of 6 and 9ppm inhibited the rate of nitrification in soil perfusion units, and an abnormally high level of nitrite nitrogen was observed in the herbicide treatments. The herbicide had no effect on the growth of Nitrosomonas europaea in shake flask culture, but did inhibit the growth of Nitrobacter agilis. The addition of yeast extract to the culture medium did not reverse the inhibition. Simazine did not inhibit the respiration of N. agilis even at a 100ppm concentration. Five organisms were isolated which could utilize simazine as a sole source of carbon and nitrogen. Pure cultures of these organisms were made and several were identified.en
dc.description.degreeMaster of Scienceen
dc.format.extent75 leavesen
dc.format.mimetypeapplication/pdfen
dc.identifier.urihttp://hdl.handle.net/10919/74595en
dc.language.isoen_USen
dc.publisherVirginia Polytechnic Instituteen
dc.relation.isformatofOCLC# 21379833en
dc.rightsIn Copyrighten
dc.rights.urihttp://rightsstatements.org/vocab/InC/1.0/en
dc.subject.lccLD5655.V855 1965.F374en
dc.subject.lcshSimazineen
dc.subject.lcshSoil microbiologyen
dc.subject.lcshNitrogen -- Fixationen
dc.titleThe effect of simazine on nitrification and the decomposition of simazine by soil microorganismsen
dc.typeThesisen
dc.type.dcmitypeTexten
thesis.degree.disciplineBacteriologyen
thesis.degree.grantorVirginia Polytechnic Instituteen
thesis.degree.levelmastersen
thesis.degree.nameMaster of Scienceen

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