hrvatski

In vivo probavljivost vlaka u tovu junadi hranjene siliranim rehidriranim zrnom kukuruza

Maize starch from the grain, cob and the whole plant silage is the main energy source for fattening beef cattle. Ensiling increases degradability of grain starch in rumen and digestibility in the small intestine, which increases maize energy value, but also the risk of decreased fiber digestibility and acidosis. Rehydration enables ensiling of dry grain when a farm has facilities for silage instead for dry grain. Since higher starch degradability could affect neutral detergent fiber (NDF) digestibility, this study aimed to compare fiber digestibility in beef cattle feed starch from the same maize hybrid in the form of dry (DMG) and ensiled rehydrated grain (ERMG). Grain of hybrid Bc 572 was rehydrated to 32% moisture content and ensiled with the addition of a commercial inoculant. The experiment was carried out using four fattening Simmental beef cattle, similar in weight and age, that were assigned to the ration with dry or ensiled rehydrated maize grain in a cross-over design with two 17-day periods. Rations differentiated in contents of starch (P<0.05 ; DMG 38.45% and ERMG 32.46%) and NDF (DMG 27.24% and ERMG 29.48%). Chromium(III) oxide was added as digestibility indicator. Beef cattle fed ERMG, compared to DMG, had a lower digestibility (P<0.05) of dry matter (57.16% vs. 60.21%) and NDF (45.54% vs. 57.08%). Treatment with ERMG did not have a significant effect on fecal pH as an indicator of acidosis. Despite lower starch content, the addition of ensiled rehydrated

tov junadi ; probavljivost vlakana ; silirano rehidrirano zrno kukuruza

nije evidentirano