Yield and profitability of flooded rice genotypes in relation to nitrogen doses and phosphorus and potassium application

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dc.creatorGustavo Gomes Lima
dc.creatorOsmar Henrique de Castro Pias
dc.creatorAmanda Posselt Martins
dc.creatorTales Tiecher
dc.creatorFelipe de Campos Carmona
dc.date2020
dc.date.accessioned2026-07-07T04:31:08Z
dc.descriptionThe use of hybrid genotypes is a good alternative for increasing the flooded rice yield. However, there is a need for validation of the fertilizer management under different edaphoclimatic conditions and its greater profitability. This study aimed to evaluate the grain yield and profitability of rice hybrids in relation to N doses and fertilization with P and K. Five hybrid cultivars and the conventional IRGA 424 CL cultivar combined with four N doses (0, 100, 150 and 200 kg ha-1) were evaluated, all with fixed doses of 90 kg ha-1 of P.O. and 150 kg ha-1 of K.O, besides an additional treatment without the addition of fertilizers. The N application increases, on average, by 10 and 35 % the flooded rice yield in years with favorable and unfavorable climatic conditions, respectively. Regardless of the year and genotype, the highest yields are obtained with doses of N between 106 and 200 kg ha-1, with the most profitable dose being the 150 kg ha-1 one (22 % higher than for the absence of N). The hybrids produce an average of 20 % more grains than the IRGA 424 CL cultivar, increasing the profitability by 18 %. In soil with adequate P and K availability, there is no increase in yield due to the application of these nutrients. However, in deficient soil, the fertilization with P and K increases the grain yield by 21 %.
dc.formatapplication/pdf
dc.identifier1517-6398
dc.identifierhttps://www.redalyc.org/articulo.oa?id=253068033060
dc.identifierhttps://www.redalyc.org/journal/2530/253068033060/
dc.identifierhttps://www.redalyc.org/journal/2530/253068033060/html/
dc.identifierhttps://www.redalyc.org/journal/2530/253068033060/253068033060.epub
dc.identifierhttps://www.redalyc.org/journal/2530/253068033060/movil
dc.identifierhttps://doi.org/10.1590/1983-40632020v5064561
dc.identifier.urihttp://hdl.handle.net/123456789/463815
dc.languageen
dc.publisherUniversidade Federal de Goiás
dc.relationhttp://www.redalyc.org/revista.oa?id=2530
dc.rightsPesquisa Agropecuária Tropical
dc.sourcePesquisa Agropecuária Tropical (Brasil) Vol.50
dc.subjectAgrociencias
dc.titleYield and profitability of flooded rice genotypes in relation to nitrogen doses and phosphorus and potassium application
dc.typeartículo científico

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Pesquisa Agropecuária Tropical - Universidade Federal de Goiás