Desempenho agroindustrial de cultivares de cana-de-açúcar em diferentes anos agrícolas

Abstract

The instability of agro-industrial performance of sugarcane cultivars in different harvests represents a problem for farmers and a great challenge for genetic improvement of the crop. When evaluating multiple cultivars in different growing seasons, the great interest lies in identifying and raising varieties of high agribusiness productivity to a later indication to producers. Thus, the objective of this study was to evaluate the agro-industrial performance and the estimation of phenotypic parameters in sugarcane cultivars from first harvest (2011/2012) and second harvest (2012/2013) in the city of Lavras – Minas Gerais. The experiments were conducted during the growing seasons of 2011/2012 and 2012/2013 in the agricultural area of a company producer of cachaça (Bocaina Agroindústria e Comércio de Cachaça), in Lavras, Minas Gerais-Brazil. The experimental design was a triple lattice 4 x 4, evaluating sixteen cultivars from three different institutions. Results evidenced that CTC7, SP813250 and CTC9 cultivars showed superior agribusiness performance in the studied area; furthermore, the estimates of repeatability coefficients as well as coefficients of determination were of great magnitude, pointing out the constancy of cultivars performance in two harvest seasons and a consequent reliability for genotypic discrimination.