Oat yield through panicle components and growth regulator/Produtividade da aveia por componentes da panicula e regulador de crescimento

The growth regulator modifies the expression of lodging and panicle components in oat plants, with reflexes in yield. The objective of this study was to define the optimal dose of growth regulator in oat for a maximum lodging of 5%. In addition, this study aimed to identify potential variables of th...

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Published inRevista brasileira de engenharia agrícola e ambiental Vol. 21; no. 4; p. 261
Main Authors Marolli, Anderson, Silva, Jose A.G. da, Mantai, Rubia D, Brezolin, Ana P, Gzergorczick, Maria E, Lambrecht, Darlei M
Format Journal Article
LanguageSpanish
Published ATECEL--Associacao Tecnico Cientifica Ernesto Luiz de Oliveira Junior 01.04.2017
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Summary:The growth regulator modifies the expression of lodging and panicle components in oat plants, with reflexes in yield. The objective of this study was to define the optimal dose of growth regulator in oat for a maximum lodging of 5%. In addition, this study aimed to identify potential variables of the panicle to compose the multiple linear regression model and the simulation of grain yield in conditions of use of the regulator under low, high and very high fertilization with nitrogen. The study was conducted in 2011, 2012 and 2013 in a randomized block design with four replicates in a 4 x 3 factorial scheme, for growth regulator doses (0, 200, 400 and 600 mL [ha.sup.-1]) and N-fertilizer doses (30, 90 and 150 kg [ha.sup.-1]), respectively. The growth regulator doses of 395, 450 and 560 mL [ha.sup.-1] are efficient, with maximum oat lodging of 5%, under low, high and very high nitrogen fertilization, respectively. The grain weight per panicle and panicle harvest index are potential variables to compose the multiple linear regression model. Multiple linear regression equations are efficient in the simulation of oat grain yield under the conditions of use of growth regulator, regardless of the N-fertilizer dose. Key words: Avena sativa nitrogen trinexapac-ethyl multiple linear regression O regulador de crescimento modifica a expressao do acamamento e componentes da panicula da aveia com reflexos na produtividade. O objetivo do estudo e a definicao da dose ideal do regulador de crescimento em aveia para no maximo 5% de acamamento. Alem disso, o estudo visa tambem identificar variaveis potenciais da panicula para compor o modelo de regressao linear multipla e a simulacao da produtividade de graos nas condicoes de uso do regulador em reduzida, alta e muito alta fertilizacao com nitrogenio. O estudo foi conduzido em 2011, 2012 e 2013 em delineamento de blocos ao acaso com quatro repeticoes em fatorial 4 x 3, para doses de regulador (0, 200, 400 e 600 mL [ha.sup.-1]) e de N-fertilizante (30, 90 e 150 kg [ha.sup.-1]), respectivamente. As doses de 395, 450 e 560 mL [ha.sup.-1] de regulador de crescimento sao eficientes, com acamamento de plantas de aveia de no maximo 5%, em reduzida, alta e muito alta fertilizacao com nitrogenio, respectivamente. A massa de graos da panicula e o indice de colheita da panicula sao variaveis potenciais para compor o modelo de regressao linear multipla. As equates de regressao linear multipla sao eficientes na simulacao da produtividade de graos de aveia nas condicoes de uso de regulador de crescimento independente da dose de N-fertilizante. Palavras-chave: Avena sativa nitrogenio trinexapac-ethyl regressao linear multipla
ISSN:1415-4366
1807-1929
DOI:10.1590/1807-1929/agriambi.v21n4p261-266