Digestibility and feeding value of cattle rumen contents in swine
2009
Umaguing, B.S.
The shortage and high cost of feed ingredients for livestock and poultry has forced raisers to identify raw materials, that are not used as food for man, for animal feeding and this includes cattle rumen content (CRC). This study was conducted to determine the digestibility, nutritive and feeding value, and economics of CRC as a component of plant protein-based swine diets. Five treatments were evaluated: Diet 1 (No CRC), Control, Diet 2 (10%), Diet 3 (12%), and Diet 4 (14%) using Completely Randomized Design with three replications. Percentage dry matter recovery of cattle rumen contents was 25.02%. Proximate analysis revealed that CRC contains: crude fiber (24.8%), nitrogen free extract (53.99%) and crude protein (15.41%). Gross energy was 0.72 Kcal/kg with an ether extract digestion coefficient of 82.48%. Crude protein and nitrogen free extract were moderately digestible, 65.17% and 46.57%, respectively. Crude fiber digestibility was 38.68%. Average initial and final weights, cumulative feed consumption and average daily gain of pigs were statistically similar in all treatments. Feed conversion ratio did not significantly vary during the starting and finishing stages, but varied significantly during the growing stage. Significant variations on protein efficiency ratio were noted only during the growing stage. Pigs fed with Diet 5 had the highest dressing percentage of 65.12 while Diet 4 fed pigs had the lowest backfat reading of 1.66 cm. Pigs fed with Diet 4 had the lowest cost of feed per unit gain in weight during the growing and finishing stages. Cattle rumen contents could be nutritionally and economically incorporated in swine diets at 10 to 14 percent levels.
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