Title:Kettes és hármas ikreket ellett tehenek kolosztrumának összetétele
SUMMARY Background: Earlier the authors determined the colostrum composition of cows after single and twin calving, and the change in the composition as a func-tion of postpartum time. It was established that the dry matter, protein, whey protein and immunoglobulin-G (IgG) content of the first colostrum immediately after calving significantly higher at twin-calving cows than at single-calving animals. As regard the other components, there were no significant differences among the cows.Objectives: During the last years they managed to collect the first milked colostrum from five cattle after triplet-calving. The objectives of this study were to determine the composition of the first milked colostrum of the triplet-calving cows, and compare the results of single-, twin- and triplet-calving cows.Materials and methods: The genotype of the three triplet-calving cows form Hajdúnánás was sired by Holstein-Friesian bulls. The population, both single-calving, twin-calving and triplet-calving, was under summer feeding conditions, based chiefly on grass. Of the three cows calving triplet-calves, two were in the second and one in the third lactation. Of the 17 control cows calving twins, eight were in the 2nd lactation and nine in the 3rd lactation. From the cattle stables of Kazsok and Kartal, they got the first colostrum of one-one Holstein-Friesian cow calving triplets. Both cows started her 2nd lactation, and were under mainly corn base silage feeding system. The composition of these samples was determined by the methods we used earlier at twin-calving animals, and the results were compared to the colostrum composition of single- and twin-calving cows.Results and discussion: It was found that for the effect of triplet-calving the protein and IgG content of colostrum increased, but the difference was not significant between twin- and triplet-calving animals. The authors are aware that others have not reported data from the point of view of the colostrum composi-tion of twin-calving, and in the case of triplet-calving, their results are unique in the world.