The objective ofthis study was to evaluate the nutritional traits and in vitro digestibilityof silages from different corn cultivars harvested at two cutting heights. Itwas evaluated 11 cultivars (Dina 766, Dina 657, Dina 1000, P 3021, P 3041, C805, C 333, AG 5011, FO 01, Dina co 9621 and BR 205) harvest 5 cm above ground(low) and 5 cm below the intersection of the first ear (high). It was used arandom block design (three blocks), arranged in a 11 × 2 factorial scheme.Silages from plants harvested at high cutting height presented average contentof dry matter significantly superior to silages from plants harvested at lowheight. Cultivars FO 01, AG 5011, Dina co 9621 and Dina 766 presented greatercontent of crude protein than cultivars C 805, P 3041 and P 3021, which presentedthe lowest contents of this nutrient. The raise in the cut height increasedin vitro dry matter true digestibility coefficients and in vitrodry matter digestibility of silage evaluated. The increase in cut height improvednutritive value of silages by decreasing concentrations of fibrous fractionsand increasing in vitro dry matter digestibility.
