Crescimento e produtividade de variedades de cana-de-açúcar em brejo de altitude no estado da Paraíba

Abstract

Brazil has a sugarcane acreage of approximately 10,123 million hectares, making it the largest crop producer in the world, with yields exceeding 621 million tons per year. On average, 55% of Brazilian sugarcane turns into alcohol and 45% into sugar. Paraíba had a cultivated area of 122.1 thousand hectares planted, quantifying a production of 5.6 million tons. The ideal management of the crop implies knowing the development patterns of each genotype, making it possible for maximum development phases to coincide with the periods of greatest availability of water and sunlight, enabling the crop to reach its full productive and genetic potential. To evaluate the development and productivity of different sugarcane varieties under conditions of altitude swamp. The work was conducted in the experimental area of the Department of Phytotechnics and Environmental Sciences of the Center for Agricultural Sciences of the Federal University of Paraíba, in Areia-PB. The experiment was in a randomized block design with 5 treatments in 5.2 x 3 subdivided plots, in which 5 cultivars were subjected to the same fertilization and weed control conditions. The evaluations were: plant height, number of leaves, average stem diameter, average stem height, internode number, tillering, number of stem per meter, brix degree and yield (TCH). For the yield variable (TCH) there was a significant difference between genotypes, while for the variables plant height, stem diameter, average stem height, tillering and brix degree, there was no statistical difference. The variety RB 867515 presented better productivity when compared to the others, while the variety RB 041443 presented higher plant height and number of internodes.