Desempenho de cultivares de cana-de-açúcar em dois preparos de solo avaliado na primeira soca

Abstract

Sugarcane (Saccharum spp.) is one of the crops that arouse the greatest economic interest in the world. Brazil has the largest cultivated area in the world, raking first is the world production of sugarcane, with about 641 million tonnes processed in the 2017/2018 harvest, directly participanting with 2% of the Brazilian GDP. Thus, there is a constant search for more adapted varieties and efficient soil managements, promoting increased production and reduced energy expenditure throughout the productive cycle of the crop. In order to evaluate the performance of eight sugarcane cultivars (RB965902, RB985476, RB855156, RB966928, RB975201, RB975242, RB036066 e RB855536), in the first cycle of the ratoon cane in two tillage systems (no-till and reduced tillage), a experiment was done at the Farm fron the Federak University of Dourados, in the municipality of Dourados-MS, Brazil. The data from agronomic performance (length and stem diameter, number of tillers per meter and yield of stalks) and industrial (soluble solid content, recoverable total sugars, botanical fiber and sucrose content and sugar productivity) of the cultivars, obtained at end of first ratoon cane cycle, were submitted to varience analysis. The means were compared using the Student-Newman-Keuls test. The RB855156 (early) and RB975242 (late) cultivars showed better performance in the no-till system, while under reduced tillage are they highlighted the RB965902 and RB855156 cultivars. The cultivar RB036066 (medium/late) presented lower performance in both tillage systems.