Response of rice cultivars to nitrogen and growth regulator chlormequat chloride

• Autor(a) principal: Buzetti, Salatiér
• Data de Publicação: 2006
• Outros Autores: Bazanini, Graciela Cristina, de Freitas, José Guilherme, Andreotti, Marcelo, Arf, Orivaldo, de Sá, Marco Eustáquio, Meira, Flávia de Andrade
• Tipo de documento: Artigo
• Idioma: por
• Título da fonte: Pesquisa Agropecuária Brasileira (Online)
• Texto Completo: https://seer.sct.embrapa.br/index.php/pab/article/view/7339
• topic: Oryza sativa; productivity components; sprinkler irrigation; Oryza sativa; componentes de produtividade; irrigação por aspersão

–The objective of this work was to evaluate N rates (0, 50, 100 and 150 kg ha-1) and the growth regulator chlormequat chloride effect (0, 1 e 2 L ha-1) on some agronomic characteristics of rice cultivars IAC 201 and IAC 202. The experimental design was a randomized block with four replicates. Nitrogen was applied as side-dressing at flower differentiation and the growth regulator was split in two times and applied at 20 and 30 days after seedlings emergency (tillering). In the harvests of 2001/2002, there was no significant effect of N rates on plant height, panicle length, spikelet per panicle, 100-grain mass and grain yield. The growth regulator rates were significant for panicle length and spikelet per panicle. IAC 202 presented higher grain yield. In the harvest of 2002/2003 there was no effect of N rates on plant height, spikelet fertility, 100-grain mass and grain yield. The growth regulator rates had no effect on tested characteristics, and IAC 202 cultivar presented higher grain yield.