Avaliação nutricional e componentes de produção para genótipos de arroz de terras altas cultivados em distintas épocas no Vale do Ribeira-SP
Nutritional assessment and production components for upland rice genotypes grown at different times in the Ribeira Valley-SP Evaluación nutricional y componentes de producción para genotipos de arroz de tierras altas cultivadas en distintas épocas en el Valle del Ribeira-SP
Brenda Juliana Elias CruzGraduanda em Engenharia Agronômica, Unesp -FCAT -Dracena, Brasil brendinha_juliana@hotmail.com
Samuel FerrariProfessor Doutor, Unesp -FCAT -Dracena, Brasil ferrari@dracena.unesp.br
Gustavo Henrique Veroneis
PALAVRAS-CHAVE:Oryza sativa L.; Nutrição; Época de semeadura.
ABSTRACTThe cultivation of rice is practiced throughout the national territory, having considerable income in new areas of cultivation, because of its low nutritional requirement, being able to produce in acid soils and low fertility. It is one of the most consumed cereals in the world, source of vitamins, proteins and calories essential for human consumption. The objective of this work was to evaluate four upland rice genotypes for the nutritional evaluation of macro and micronutrients, SPAD reading of chlorophyll and production components as a function of four sowing seasons. The research was carried out at the Unesp Experimental Farm of Campus Register-SP. The experimental design of randomized blocks arranged in a 4x4 factorial scheme was used, and the treatments consisted of four rice genotypes (ANA 7007, Moti Branco, Moti Amarelo and AN Cambará), plots consisting of five lines, each 5 m in length And spacing of 0.35 m between them, totaling 12.6 m², in four sowing seasons (October 22, November 19, December 20, 2012 and January 14, 2013), with four replications totaling 64 plots. In the absorption of nutrients, the genotype NA Cambará obtained the highest index and nitrogen and higher index of micronutrients; The sulfur contents differed in the second and third seasons, for the AN Cambará and ANA 7007 genotypes; Obtained a lower number of grains sowing in the month of January, observing a larger number of grains in the AN Cambará genotype.