Publicação: Uso do regulador de crescimento etil-trinexapac em arroz de terras altas
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This work was developed with the objective of evaluating the use of trinexapac-ethyl doses (0, 75, 150, 225 and 300 g of the a.i. ha -1) and application times (active tillering, between active tillering and floral differentiation and at floral differentiation) in upland rice crop development and yield. The experiment was carried out in Selvíria-MS, during the agricultural year of 2006/07. Application of 150 g ha -1 of trinexapac-ethyl in Primavera rice cultivar at panicle initiation differentiation reduces plants height, 0.40 m on average comparing to other times, with lodging absence. Trinexapac-ethyl promotes lange number of abnormal grains, reduction of grain yields in doses above 150 g ha -1, when applied in panicle initiation differentiation stadium. Application of 150 g ha -1 of trinexapac-ethyl at any time does not interfere in crop yield.
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Gibberellin, Oryza sativa L., Plant growth regulators, Sprinkler irrigation, biochemical composition, crop production, crop yield, cultivar, dose-response relationship, growth regulator, rice, Brazil, Mato Grosso, Mato Grosso do Sul, Primavera do Leste, Selviria, Oryza sativa
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Português
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Bragantia, v. 68, n. 4, p. 921-929, 2009.
