Farklı Laktasyon Dönemlerindeki Damascus Keçilerinde Süt Özellikleri: 1. Somatik Hücre Sayısı ve Süt Kalite Parametreleri

Abstract

In this study, milk of healthy 20 goats in the 3 rd-4 th lactation periods was analyzed in different lactation stages. While milk pH, fat, fat-free dry matter, protein, lactose and freezing point were similar between groups in all lactation stages, electrical conductivity and Somatic Cell Count (SCC) increased with the continuation of lactation (P<0.05; P<0.001). Nonspecific relations were found between SCC and electrical conductivity in mastitis-free goats. Also, correlations were found between milk quality parameters and different lactation stages at the significant levels (P<0.05, P<0.01). There was a positive correlation between SCC and milk fat in early lactation (r=0.619; P<0.05). On the other hand, a negative correlation was found between freezing point and electrical conductivity in the late lactation (r=-0.474; P<0.05). It was understood that milk composition and especially SCC values were different in different stages of lactation in Damascus goats.The relationship between the components of milk was found to be related to the lactation period. As a result, while the chemical composition of milk did not change during the lactation, it was concluded that the milk produced in the early lactation had lower SCC and electrical conductivity values than in the other lactation stages, and the milk produced in early lactation stage was higher quality.