Manejo de adubação foliar em cana-de-açúcar no brejo paraibano

Abstract

Sugarcane (Saccharum spp.) is one of the main crops planted in Brazil, with the main producing region being the Southeast, standing out in the production of alcohol, sugar, bio fertilizers, brown sugar, molasses, energy source and cachaça, leading the country as the world's largest producer of sugarcane. The crop belongs to the grass family, characterized as perennial, monocotyledonous, allogamous, and originated from Indonesia and New Guinea. The work aimed to evaluate the response of foliar fertilization with different application doses in a sugarcane genotype soca in Brejo Paraibano. The work was conducted between August 2020 and September 2021, at the Fazenda Experimental Chã de Jardim, of the Departamento de Fitotecnia e Ciências Ambientais (DFCS), in the Centro de Ciências Agrárias (CCA), of the Universidade Federal da Paraíba (UFPB), in the municipality of Areia PB, Brazil. The experimental design adopted was a randomized block design, consisting of seven treatments with four repetitions (blocks), totaling 28 experimental units. The variables studied were plant height, number of leaves, diameter of canes, number of internodes and tons of canes per hectare, submitted to variance analysis and Tukey's test in the Sisvar statistical program. According to the results obtained analyzed at the end of the experiment by Sisvar, a significant influence was obtained for the number of leaves in the second evaluation at 180 days after cutting and in the fourth evaluation at 300 days after cutting in the evaluation of production for tons of stalks per hectare, while for the other variables there was no significance, however, the fractional applications (100+180, 100+240 and 180+240 DAC) showed better results in the evaluations performed. Thus, it can be concluded that the fractionated application of 100+180 showed better results for foliar fertilization in ratoon sugarcane culture in Brejo Paraibano in the studied genotype.