[Increasing the effectiveness of feed mixtures for the early weaning of piglets with the addition of fats or growth stimulators]

M Dvorák
Veterinární Medicína 1984, 29 (3): 151-62
In three experiments, 101 early-weaned piglets were given for 21 days feed mixtures containing 200 to 284 g crude protein per kg, the ratio of digestible energy to protein being 56 to 83. The effect of an up to 4% supplement of lard or cyadox as growth stimulant was studied as exerted on protein economy. In comparison with the system in which the animals were given the COS 1 high-protein complete mixture in the first week followed by the administration of COS 2, enrichment of the COS 2 mixture with cyadox increased the intake of feed and the growth of the piglets; on the other hand, it reduced the consumption of feed and crude protein per kg of gain, particularly in the first week (by 19, 33, 10 and 33%, respectively). The content of 25 g of lard in kg of the COS 2 mixture increased the efficiency of its administration to a higher degree than the addition of 50 mg of cyadox, mainly in the first post-weaning week. The increase in the energy value of feed through fortification with lard had a more pronounced influence on the effectiveness of the mixture with cyadox supplement as compared with the increase in the energy value of the feed mixture resulting from the addition of maize. It was only in individual cases that lard administration increased the concentration of cholesterol and non-esterified fatty acids in blood plasma, or such an increase was only insignificant. The use of a feed mixture containing 200 to 214 g crude protein per kg and a lard or growth stimulant supplement can increase the efficiency of the nutrition of piglets weaned at the age of four weeks; in this way it is possible, with economic advantage, to replace the COS 1 mixture inducing undesired hyper-uremia. Cyadox in mixture A 1, administered in the fourth and fifth week after the weaning of the piglets, increased weight gains by 14% and reduced feed consumption by 10% without reducing growth rate.

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