Efeito da aplicação de doses de bioestimulante sobre a produção e qualidade fisiológica das sementes de três cultivares de arroz
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Data
2006-07-26
Autores
Barbosa, Gustavo Tavares [UNESP]
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Universidade Estadual Paulista (Unesp)
Resumo
Em busca de inovações na agricultura para alcançar altas produtividades e qualidade fisiológica dos produtos colhidos com a cultura do arroz, o presente trabalho teve como objetivo estudar o efeito da aplicação de cinco doses de bioestimulante sobre a produção e qualidade fisiológica das sementes de três cultivares de arroz. O experimento foi instalado em dezembro, ano agrícola 2005/06 na Fazenda de Ensino e Pesquisa, pertencente à Faculdade de Engenharia - Campus de Ilha Solteira - UNESP, localizada no município de Selvíria-MS. O delineamento experimental utilizado foi em blocos casualizados, com tratamentos em arranjo fatorial 3x5, correspondendo os cultivares (IAC 202, BRS Soberana e Primavera) e doses de bioestimulante (0; 1,0; 1,5; 2,0 e 2,5 L de bioestimulante ha -1 ), com quatro repetições. Foram avaliados características fenológicas, componentes vegetativos e de produção, rendimento de engenho, produtividade, comprimento de panículas, qualidade fisiológica das sementes e teores de clorofila e nutrientes presentes na folha bandeira. Os cultivares evidenciaram comportamentos diferentes e pelos níveis da qualidade das sementes, se mostrou mais indicado o uso do cultivar BRS Soberana, a dose de 1,0 L ha -1 de bioestimulante foi a que proporcionou maior porcentagem de grãos inteiros e melhor qualidade das sementes. O cultivar IAC 202 é o mais indicado na busca de alta produtividade, porém não se verificaram efeitos do bioestimulante no desempenho das sementes em relação à produtividade.
In search of innovations in the agriculture to reach high productivities and physiological quality of the products picked with the culture of the rice, the present work had as objective studies the effect of the application of five plant growth regulators dosis on the production and physiological quality of the seeds of three it rice cultivars. The experiment was installed in December, agricultural year 2005/06 at Experimental Station of Faculdade de Engenharia - Campus de Ilha Solteira- UNESP, located in the municipal district of Selvíria-MS. The experimental design used was randomized blocks, with treatments in factorial arrangement 3x5, corresponding 3 cultivars (IAC 202, BRS Soberana and Primavera) and dosis of plant growth regulators (0; 1,0; 1,5; 2,0 and 2,5 L of plant growth regulators ha -1 ), with four repetitions. They were appraised growth plant characteristics, vegetative components and of production, mill income, productivity, panículas length, physiologic quality of the seeds and chlorophyll tenors and present nutrients in the leaf flag. You cultivate evidenced them different behaviors and for the levels of the quality of the seeds, it was shown more suitable the use of cultivating BRS Soberana, the dose of 1,0 L have-1 of plant growth regulators it was the one that provided larger percentage of whole grains and better quality of the seeds. Cultivating IAC 202 is the most suitable in the search of high productivity, however effects of the plant growth regulators were not verified in the acting of the seeds in relation to the productivity.
In search of innovations in the agriculture to reach high productivities and physiological quality of the products picked with the culture of the rice, the present work had as objective studies the effect of the application of five plant growth regulators dosis on the production and physiological quality of the seeds of three it rice cultivars. The experiment was installed in December, agricultural year 2005/06 at Experimental Station of Faculdade de Engenharia - Campus de Ilha Solteira- UNESP, located in the municipal district of Selvíria-MS. The experimental design used was randomized blocks, with treatments in factorial arrangement 3x5, corresponding 3 cultivars (IAC 202, BRS Soberana and Primavera) and dosis of plant growth regulators (0; 1,0; 1,5; 2,0 and 2,5 L of plant growth regulators ha -1 ), with four repetitions. They were appraised growth plant characteristics, vegetative components and of production, mill income, productivity, panículas length, physiologic quality of the seeds and chlorophyll tenors and present nutrients in the leaf flag. You cultivate evidenced them different behaviors and for the levels of the quality of the seeds, it was shown more suitable the use of cultivating BRS Soberana, the dose of 1,0 L have-1 of plant growth regulators it was the one that provided larger percentage of whole grains and better quality of the seeds. Cultivating IAC 202 is the most suitable in the search of high productivity, however effects of the plant growth regulators were not verified in the acting of the seeds in relation to the productivity.
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Palavras-chave
Arroz - Semente, Tecnologia de sementes, Sementes - Qualidades, Analise foliar, Oryza sativa L, Chlorophyll tenor
Como citar
BARBOSA, Gustavo Tavares. Efeito da aplicação de doses de bioestimulante sobre a produção e qualidade fisiológica das sementes de três cultivares de arroz. 2006. v, 40 f. Dissertação (mestrado) - Universidade Estadual Paulista, Faculdade de Engenharia, 2006.