Efeitos do manejo da adubação foliar na biometria e produtividade da cana-de-açúcar

Abstract

Brazil stands out internationally for its sugarcane production, a crop of great economic importance for the country. Seeking to improve the productive performance of this species, some management strategies are essential, such as mineral fertilization. In this sense, the use and management of foliar fertilization can contribute to obtaining better yields in this crop. Thus, this study aimed to evaluate the biometric and productive responses of sugarcane RB92579 to the use and management of foliar fertilization in theedaphoclimatic conditions of Brejo Paraibano. The experiment was carried out at the Experimental Farm of Chã de Jardim, in the municipality of Areia, Paraíba. A randomizedblock design was used, consisting of 7 treatments, control, single application at 100, 180and 240 days and split application at 100/180, 100/240 and 180/240 days. At the end of the first crop cycle, plant height (AP), average stem diameter (DC), number of internodes(NE), number of stalks per linear meter (NC), average stem height (EMC), tons of culm per hectare (TCH) and °Brix. There was a significant effect of the use and splitting of foliar fertilization on all analyzed variables, with the exception of the number of stalks. The results showed that the application of foliar fertilization at 240 days after planting isnot an alternative for the improvement of most biometric variables and sugarcaneproductivity, such as for the plant height variables, TCH and °Brix. However, splitting, especially 100/240, can be recommended to obtain better vegetative and productive performance in RB92579.