Caracterização de clones de cana-de-açúcar (Saccharum spp) em Paranavaí e Pelotas

Abstract

Sugarcane is of great importance to Rio Grande do Sul State for being associated with family farming activities. Sugarcane is used for the production of cane brandy, brown sugar, molasses, “rapadura” (candy of the juice of sugar cane) and animal feed. RS state is considered the new agricultural frontier for sugarcane being included in the Agroclimatic zoning. For that reason it is important to obtain modern and productive cultivars with cold and drought tolerance characteristics. Therefore, the objective of this work was to evaluate, characterize and select sugarcane clones of the RB12 series. Experiments were carried out in Paranavaí, PR and Pelotas, RS. The following variables were evaluated Total Soluble Solids (°Brix), number of stalks per meter (NCM), tons of stalks per hectare (TCH), tons of Brix per hectare (TBH), tolerance to the main diseases and maturation. Variance analysis (ANOVA) showed interaction G x E among clones and environment, as well as variability concerning the maturation cycle. Paranavaí obtained superior agronomic performance when compared to Pelotas. The clones showed Brix content, stalk and sugar productivity greater in Paranavaí. Clones showed tolerance to brown and orange rust, charcoal and leaf spots. Regarding the maturity cycle, clones were grouped in early, mid-late and late cycles.