Composição química de sementes de arroz irrigado em função da dose e do parcelamento de nitrogênio

Abstract

Rice (Oryza sativa) is the third most harvested crop in the world. Among the practices adopted by rural producers for rice cultivation, in order to increase productivity, in addition to evolution in management, is the use of certified highquality seeds. Therefore, the objective of this work was to evaluate the influence of the application of different doses of nitrogen on the physiological quality and mineral chemical composition of rice seeds. The work was divided into phase I with five doses and divided into three applications (V3, V6 and R0) and phase II consisting of five doses in three regions (West Border, South and Campaign) of RS. The variables evaluated for seed quality, thousand mass and chemical composition. The results show the influence of the nitrogen dose on the constitution of rice seeds. The physiological quality of the seeds produced in the Campaign showed superior quality in relation to the other environments. For the correlation analysis, it was observed that for the variables of vigor and seed germination, significant correlations were observed.