Value of feather meal in a molasses-based liquid supplement fed to yearling cattle consuming a forage diet. -- p. 2865-2872

Autor:

Pate, F.M. Brown, W.F. Hammond, A.C.

Pie de Imprenta:

Journal of animal science USA. Vol. 73, no. 10 Oct 1995.

Resumen:

Hydrolyzed feather meal (FM) was compared to other sources of CP to determine its value as a protein source in a molasses-based liquid supplement. Ruminal N escape values (measured in situ) for FM, ring-dried blood meal, cottonseed meal, and soybean meal approximated reported values. Ruminal N escape value for catfish meal was lower than values reported for other fish meals. In two trials (194 d), 84 yearling heifers were allotted to 12 pastures (3 pastures/treatment) and fed one of four supplements (1.7 kg of DM.heifer-1.d-1) containing either molasses and urea; molasses, urea, and FM; molasses, urea, FM, and catfish meal; or molasses, urea, FM, and catfish oil. Heifers were exposed to bulls for 60 d. In two trials, 112 steers were allotted to 16 pastures (4 pastures/treatment) and fed one of four supplements (1.7 kg of DM.steer-1.d-1) containing molasses and urea; molasses, urea and FM; molasses, urea, FM and ring-dried poultry blood meal; or molasses, urea, and poultry feathers and blood hydrolyzed together. In all trials, cattle fed molasses containing FM had faster gains (P MINOR 0.05) and heifers had heavier live weights at breeding (P MINOR 0.05) and higher pregnancy rates (P MINOR 0.05) than cattle fed molasses and urea. Combining poultry blood with molasses, urea, and FM improved (P MINOR 0.05) steer gains in one of two trials. Combining catfish meal with molasses, urea, and FM did not improve (P BIGGER THAN 0.05) ADG or pregnancy rate of heifers. Combining catfish oil with molasses, urea, and FM increased (P MINOR 0.05) ADG in one trial and blood cholesterol and live weight of heifers at breeding in both trials. It is concluded that protein feeds, such as FM, that contain a large portion of ruminally undegradable protein may provide much of the CP in liquid supplements fed to growing cattle consuming moderate-quality forage. Adding catfish oil to a liquid supplement may improve ADG and live weight of yearling heifers at breeding.

Ubicación:

HEM.