03520nab a2200325 i 4500003000900000005001700009008004100026040001800067072001400085072000800099100003700107100002600144100001900170100003000189100003600219245009400255500007700349520112100426520120201547650001002749650002902759650001402788650003502802650002302837650001802860773022002878856006903098942000803167999001903175BR-BrBNA20250615120308.0250615b2020    bl.ar|pooa||| 00| 0 eng |  aBR-BrBNAbeng  aF01b0150  aF60  aMeirelles, Flávia Constantino   aGonzaga, Alex Rangel   aArf, Orivaldo   aPortugal, José Roberto   aPortugal, Amanda Ribeiro Peres   aDoes growth regulator associated with fungicide interfere on productivity of upland rice?  a

Publicação online; 25 ref.; 4 illus.; 4 tables: Summaries (En, Pt)  a


ABSTRACT:   Management measures should be tested to increase the rice productivity, a staple foodthat is in increasing demand. The aim ofthis study was to evaluate the efficacy of different doses of a plant growth regulator, ethyl-trinexapac, combined with the application of the fungicides epoxiconazole + pyraclostrobin in reducing the height of rice plants to avoid lodging and increaserice yield. The experiment was conducted in a dystrophic Oxisol soil during two harvests(2010/2011 and 2011/2012). The study was arranged in a randomized block design, in a 4 × 2 factorial scheme, with four replications. The factors considered were four doses oftrinexapac- ethyl(0, 25, 50, and 75 g ha-1active ingredient (a.i.)), with or without application offungicide (137.25 gha-1a.i.). The growth regulator caused a reduction in plant height in both harvests and affected the number of panicles per square meter in the second harvest. The fungicide had no effect on the productivity and yield components ofthe crop. 


KEYWORDS:   OryzasativaL., Epoxiconazole + pyraclostrobin, Ethyl-trinexapac, Lodging, Plants height  a


RESUMO:   Medidas de gestão devem ser testadas para aumentar a produtividade do arroz, um alimento básico, que está em crescente demanda. O objetivo deste estudo foi avaliar a eficácia de diferentes doses de um regulador de crescimento de plantas, etil-trinexapac, combinado com a aplicação do fungicida, epoxiconazol+ piraclostrobina, na redução da altura das plantas de arroz, para evitar o acamamento e aumentar o rendimento do arroz. O experimento foi conduzido em Latossolo Vermelho distrófico durante duas colheitas (2010/2011 e 2011/2012). O delineamento foi em blocos casualizados, em esquema fatorial4 × 2, com quatro repetições. Os fatores considerados foram quatro doses de etil-trinexapac (0, 25, 50 e 75 gha-1de ingrediente ativo (a.i.)), com ou sem aplicação de fungicida (137,25 g ha-1a.i.). O regulador de crescimento causou redução na altura das plantas nas duas safras e afetou o número de panículas por metro quadrado no segundo ano de cultivo. O fungicida não afetou os componentes de produtividade e rendimento da cultura. 


PALAVRAS-CHAVE:  Oryzasativa L, Epoxiconazol + piraclostrobina, Etil-trinexapac, Acamamento, Altura de plantas  aARROZ  aREGULADOR DE CRESCIMENTO  aFUNGICIDA  aPROPRIEDADE FÍSICO-QUÍMICA  aFISIOLOGIA VEGETAL  aPRODUTIVIDADE0 035519345998dBelém-PA Faculdade de Ciências Agrárias do Pará 1999o2024-6647tRevista de Ciências Agrárias (Brazil)x1517-591X Impresso/Versão online ISSN 2177-8760gv. 63 p. 1-7; (2020)wBR2025003875  uhttps://ajaes.ufra.edu.br/index.php/ajaes/article/view/3253/1601  cANA  c332074d332074