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dc.contributor.advisorGhadiri, Hossein
dc.contributor.advisorChen, Chengrong
dc.contributor.authorRezaei Rashti, Mehran
dc.date.accessioned2018-01-23T02:19:38Z
dc.date.available2018-01-23T02:19:38Z
dc.date.issued2015
dc.identifier.doi10.25904/1912/2902
dc.identifier.urihttp://hdl.handle.net/10072/365552
dc.description.abstractAgricultural manipulation of the soil nitrogen (N) cycle has caused a significant increase in nitrous oxide (N2O) emissions during the past five decades. Nitrous oxide is one of the major greenhouse gases with potent and long-lasting global warming effects [298 times higher than carbon dioxide (CO2) over a time period of 100 years]. The major biogenic processes responsible for N2O production in agricultural soils are identified as nitrification which is the oxidation of ammonium (NH4+) to nitrite (NO2-) and nitrate (NO3-) and denitrification that is the anaerobic reduction of NO2- and NO3- to gaseous nitric oxide (NO), N2O or N2. Although the current concentration of N2O in the atmosphere is relatively lower than other greenhouse gases, it is annually increasing at a rate of 0.25%. Vegetable cropping systems, a major agricultural activity worldwide, generally comprise intensive cultivation and high rates of N application. However, the N recovery from intensively cultivated vegetable fields is reported to be only 20 - 50% of the applied N fertiliser, suggesting large amounts of N loss from these fields. In Australia, horticulture represents less than 1% of land used for agriculture, but accounts for 6-12% of N fertiliser use in agriculture and its contribution to national N2O emissions is significant.
dc.languageEnglish
dc.publisherGriffith University
dc.publisher.placeBrisbane
dc.rights.copyrightThe author owns the copyright in this thesis, unless stated otherwise.
dc.subject.keywordsN2O emissions
dc.subject.keywordsNitrous oxide
dc.subject.keywordsAgricultural soils
dc.subject.keywordsVegetable cropping systems
dc.titleNitrous Oxide Emissions from Vegetable Cropping Systems
dc.typeGriffith thesis
gro.facultyScience, Environment, Engineering and Technology
gro.rights.copyrightThe author owns the copyright in this thesis, unless stated otherwise.
gro.hasfulltextFull Text
dc.contributor.otheradvisorWang, Weijin
dc.contributor.otheradvisorMoody, Philip
dc.rights.accessRightsPublic
gro.identifier.gurtIDgu1444699816416
gro.source.ADTshelfnoADT0
gro.source.GURTshelfnoGURT
gro.thesis.degreelevelThesis (PhD Doctorate)
gro.thesis.degreeprogramDoctor of Philosophy (PhD)
gro.departmentGriffith School of Environment
gro.griffith.authorRezaei Rashti, Mehran


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