Abstract

From the hypothesis that during the development of sugarcane, the water regime affects the morphological performance and this affects the productivity. The objective of this work was to evaluate the growth, development, productivity and yield of sugarcane during the cycle the planting sugarcane (variety SP83-5073), under different water replacements. The experiment was established in the Boa Vista mill located in Quirinópolis – GO, Brazil, on a distroferric Red Latosol cerrado phase. The experimental design was a randomized complete block, analyzed in a split plot scheme with four replications. Irrigation was carried out by a hose-drawn traveller sprinkler systems coupled to an irrigation bar. The evaluated variables were plant height, stem diameter, number of leaves and leaf area of two plants located in the useful area of each plot. The results were submitted to analysis of variance by F test at 5% probability, and in cases where significant difference were observed, regression analysis was performed on the water replacement levels and the evaluation dates, using the statistical software SISVAR. The growth of sugarcane was influenced positively by water replacement, depending on the season and applied blade, for plant height variables, stem diameter, leaf number and leaf area. The sugarcane yield obtained maximum increases of 61.07% and 81.52 t ha-1 on the blade 86.16% of water replacement with a productivity of 133.5 t ha-1.

Key words: Irrigation depth, biometry, water deficit, yield.