Comparison of Response to Nitrogen between Upland NERICAs and ITA (Oryza sativa) Rice Varieties

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dc.contributor.authorOnaga, Geoffrey
dc.contributor.authorAsea, Godfrey
dc.contributor.authorLamo, Jimmy
dc.contributor.authorKikafunda, Joseph
dc.contributor.authorBigirwa, George
dc.date.accessioned2022-02-19T07:06:37Z
dc.date.available2022-02-19T07:06:37Z
dc.date.issued2012
dc.description.abstractAverage yields of upland rice are the lowest in Uganda, and most of the productivity gains attributed to improved varieties are related to increased area of production from clearing virgin lands for rice production. In a bid to optimize productivity, we compared the effect of four nitrogen fertilizer treatments: 0, 40, 80 and 120 kgN/ha and two variety types (ITAs (Oryza sativa) and NERICAs (New rice for Africa)) on grain yield and yield parameters in four locations. Combined analysis of variance revealed that nitrogen fertilizer increased mean grain yields from 2116-5200 kg/ha in the NERICAs and 2331-5100 kg/ha in the ITAs. In all the study areas, NERICA 4 and NARIC 2 outperformed NARIC 1 and NERICA 1, and yield trends were consistent over the years suggesting that the two varieties respond better to N fertilizer application. However, the productivity gains are probably related to genetic potential of the varieties rather than the N fertilizer effect, as reflected by the consistent relative performance between 0 N and other N rates. The heavier grains of NARIC 2 and NERICA 4 suggest greater dry matter accumulation before heading, as these varieties have a longer period of vegetative growth. The significant interaction of location x fertilizer and location x variety reveals the need for evaluating the nitrogen-supplying power of soils in the various cropping systems in the country.en_US
dc.identifier.citationLamo, J., Kikafunda, J., & Bigirwa, G. (2012). Comparison of response to nitrogen between upland NERICAs and ITA (Oryza sativa) rice varieties. Journal of Agricultural Science, 4(6). http://dx.doi.org/10.5539/jas.v4n6p197en_US
dc.identifier.urihttp://dx.doi.org/10.5539/jas.v4n6p197
dc.identifier.urihttps://nru.uncst.go.ug/xmlui/handle/123456789/2215
dc.language.isoenen_US
dc.publisherJournal of Agricultural Scienceen_US
dc.subjectITAsen_US
dc.subjectNERICAen_US
dc.subjectNitrogen fertilizeren_US
dc.subjectUpland riceen_US
dc.subjectGrain yielden_US
dc.titleComparison of Response to Nitrogen between Upland NERICAs and ITA (Oryza sativa) Rice Varietiesen_US
dc.typeArticleen_US
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