Influence of order of lactation on milk production and somatic cell count in Alpine goats

Abstract

In this paper, the annual results of the effect of lactation on milk production, the contents of some chemical parameters in the milk (milk fat, protein and dry matter without fat) and somatic cells in milk goat breeds Alpino in intensive production during one production year. Control is included a total of 82 French Alpine goats in different lactations (first-16 heads, the second-19 heads, 29 heads the third-and fourth and subsequent lactation together-18 heads).). Somatic cell count and chemical quality of milk is controlled on a daily basis in the laboratory for raw milk AD 'Dairies' - Subotica on the machine CombiFoss FC 6200. The variability of the analyzed characteristics is presented descriptive parameters and the effect of lactation is determined by a factorial analysis of variance. The average value for somewhat milk goats for the treated population was 362.83 kg, with average milk fat content of 3.31%. Analysis of variance confirmed that the differences that were established under the influence of lactation for all traits analyzed, except for percentage of milk fat, were significant at P lt 0.01.

U ovom radu prikazani su rezultati ispitivanja uticaja laktacije po redu na proizvodnju mleka, sadržaj mlečne masti, proteina i suve materije bez masti i broj somatskih ćelija u mleku koza francuske rase Alpina u intenzivnoj proizvodnji u toku jedne proizvodne godine. Kontrolom je obuhvaćeno ukupno 82 grla u različitim laktacijama (prva - 16 grla, druga - 19 grla, treća - 29 grla, a četvrta i naredne latkacije zajedno - 18 grla). Broj somatskih ćelija, kao i hemijski kvalitet mleka, kontrolisan je svakodnevno u laboratoriji za sirovo mleko AD 'Mlekare' - Subotica na aparatu CombiFoss 6200 FC. Varijabilnost analiziranih osobina je prikazana parametrima deskriptivne statistike, a uticaj laktacije po redu je utvrđen jednofaktorijalnom analizom varijanse. Prosečna vrednost za ukupnu količnu mleka kod ispitivane populacije koza iznosila je 362,83 kg, sa prosečnim sadržajem mlečne masti od 3,31%. Rezultati analize varijanse potvrđuju da su razlike koje su ustanovljene pod uticajem laktacije po redu za sve analizirane osobine, izuzev za procenat mlečne masti, bile značajne na nivou P lt 0.01.