[Use of feed mixture with a higher content of plant proteins in piglets during the weaning period].

Two experiments with 56 piglets and pilot trial on 84 piglets were performed to demonstrate that it is possible to replace the complete mixture for early piglet weaning (COS-1, or COS-2) by an experimental mixture without fish meal, with a higher proportion of soya and maize, supplemented by lysine and methionine; this mixture is to be fed to piglets in the weaning period. The weight gain dropped in both basic experiments after weaning, especially in the group with a higher content of nitrogenous matters in the diet. No significant inter-group differences were found in the activity of enzymes in serum and in liver, nor were they found in the adrenocortical activity.