Métodos de aplicação da adubação nitrogenada no sorgo cultivado em terras baixas

Abstract

Sorghum (Sorghum bicolor) is a C4 plant that belongs to the Poaceae family, it has several possibilities of use, in addition to its high productive potential, it has good water resistance, for the plant to express its potential, it is necessary, among other practices, to receive fertilization in correct amounts, the crop responds effectively to nitrogen fertilization, with nitrogen being one of the most influential nutrients in improving the morphological and productive attributes of sorghum. The objective of this work is to evaluate the response of sorghum to different application methods of nitrogen fertilization. The nitrogen application method is an alternative that can be used to improve nitrogen (N) management in sorghum. The objective of this study was to evaluate three nitrogen fertilization methods on sorghum in lowlands. The experiment was conducted at Unipampa Campus Alegrete during the 2022/2023 growing season. The study consisted of three manually implemented treatments, represented by the following methods: Traditional, with nitrogen fertilization broadcasted over the entire area; Incorporated, with nitrogen fertilization incorporated into the soil before sowing; Precision, with targeted nitrogen fertilization applied in a directed manner, near the row. Urea was used as the source, containing 44% N. The experimental design was randomized complete blocks with 4 replications, using a furrow-ridge system. The treatments significantly influenced the number of kernels. head-1 and yield. The Precision treatment showed the highest yield, followed by the Incorporated and Traditional treatments. Therefore, yield and nitrogen utilization can be enhanced through the N application method. Keywords: Sorghum. Nitrogen. Sustainability.