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Biomass and grain yield of oats by growth regulator/Produtividade de biomassa e graos de aveia pelo regulador de crescimento

The use of growth regulator in oats can reduce plant lodging with reflections in biomass and grain yield. The objective of the study was to determine the feasibility and efficiency of using Trinexapac-Ethyl regulator in the growth of white oat under different conditions of N-fertilizer and years fav...

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Published in:Revista brasileira de engenharia agrĂ­cola e ambiental 2017-03, Vol.21 (3), p.163
Main Authors: Marolli, Anderson, Silva, Jose A.G. da, Romitti, Marcos V, Mantai, Rubia D, Hawerroth, Maraisa C, Scremin, Osmar B
Format: Article
Language:English
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Summary:The use of growth regulator in oats can reduce plant lodging with reflections in biomass and grain yield. The objective of the study was to determine the feasibility and efficiency of using Trinexapac-Ethyl regulator in the growth of white oat under different conditions of N-fertilizer and years favorable and unfavorable for cultivation. In this study, two experiments were conducted in the years 2011, 2012 and 2013, one for quantifying biomass production rate and the other for the determination of grain yield and lodging. The experimental design was randomized blocks with four replicates, in a 4 x 3 factorial scheme, for growth regulator doses (0, 200, 400 and 600 mL [ha.sup.-1]) and nitrogen doses (30, 90 and 150 kg [ha.sup.-1]), respectively. There is a linear reduction of biomass rate with the increase in the growth regulator dose in oat, regardless of the condition of year and use of N-fertilizer. The growth regulator dose of 495 mL [ha.sup.-1] efficiently reduces lodging with reduced, high and very high use of N-fertilizer, without reducing the yield of oat grains, in favorable, intermediate or unfavorable year for cultivation. Key words: Avena sativa Trinexapac-ethyl lodging nitrogen regression O uso do regulador de crescimento em aveia pode reduzir o acamamento de plantas com reflexos na produtividade de biomassa e graos. Objetivou-se, no estudo, determinar a viabilidade e a eficiencia do uso do regulador de crescimento Trinexapac-Ethyl em aveia branca em diferentes condicoes de uso de N-fertilizante e de ano favoravel e desfavoravel ao cultivo. Neste estudo, dois experimentos foram conduzidos nos anos de 2011, 2012 e 2013, um para quantificar a taxa de producao de biomassa e outro para determinacao da produtividade de graos e o acamamento. O delineamento experimental foi de blocos ao acaso com quatro repeticoes em esquema fatorial 4 x 3 para doses de regulador de crescimento (0, 200, 400 e 600 mL [ha.sup.-1]) e doses de nitrogenio (30, 90 e 150 kg [ha.sup.-1]) respectivamente. Ha reducao linear da taxa de biomassa com o incremento da dose de regulador de crescimento em aveia independente da condicao de ano e uso de N-fertilizante. No uso reduzido alto e muito alto de N-fertilizante, a dose de 495 mL [ha.sup.-1] de regulador reduz com eficiencia o acamamento sem prejuizos na produtividade de graos de aveia, seja ano favoravel, intermediario ou desfavoravel ao cultivo. Palavras-chave: Avena sativa Trinexapac-ethyl acamamento nitrogenio regressao
ISSN:1415-4366