Nutritive value of cultivars of cane sugar under irrigation

Abstract

The objective of this present trial was to evaluate the chemical composition and in vitro dry matter digestibility (IVDMD) of sugarcane cultivars receiving different levels of irrigation water. It was evaluated the cultivars RB 96-1003, RB 94-3206, RB 72454, RB 01-2018, VAT 90212, RB 01-2046 and RB 92-579 and irrigation water of 1005, 80%, 60% and 40% of real evapotranspiration of sugarcane (ETc) in a completely randomized block experimental design and factorial arrangement. Each experimental unit was constituded by cultived in double lines and the irrigation system was subsurface drip irrigation with compensating emitters. Twelve months after planting, the sugarcanes were cut to determine levels of dry matter (DM), ash, organic matter (OM), crude protein (CP), neutral detergent fiber (NDF), acid detergent fiber (ADF), ether extract (EE) and IVDMD. The cultivars RB 943206 and RB 01-2018 were positively highlighted in relation to CP levels, although RB 961003 had highlighted IVDMD values. Using tge irrigation of 100% of ETc were obtained higher DM and lower IVDMD values in comparison with others.