Cow udder development and productivity relationship with healthiness

The aim of the thesis is to research cow udder development and productivity connections with healthiness. Purpose of the work: 1. Discover connections between cow udder development and healthiness. 2. Research cow productivity and healthiness connections. 3. Estimate the different classes of SCC cow’s udder morphology and productivity. 4. Estimate the different classes of urea udder morphology and productivity. 5. Perform milk yield and composition and morphological characteristics of udder SCC, urea and correlation analysis. The scientific research was carried out between 2010-2012 at the Department of Animal Breeding of the Veterinary Academy of the Lithuanian University of Health Sciences and dairy farm. The study evaluated 50 cows. Milk analyses were carried out in SE “Pieno tyrimai”. Milk fat (%), protein (%), lactose (%) and urea (mg%) were determent using the testing device “LactoScope FTIR” (FT1.0. in 2001, Delta Instruments, Netherlands) SCC (thousand/ml) was determent using a device\" “SomaScope” (CA-3A4, 2004, Delta Instruments, Netherlands). The study measured morphological parameters of the udder quarter (cm): rear udder’s height, udder width, udder’s distance to the ground, the distance between the front teat, the distance between the rear teat, the distance between the right side teats, the distance between the left side teats, teat's length, teat's thickness. Descriptive statistics: the average of investigated traits (M), standard errors (SE), the coefficient of variations (CV) and correlation (r) between signs were calculated using the EXEL. Research showed that largest positive correlation exist between urea and udder distance form the surface (r=0,279; p<0.05); SCC and distance from front teats (r=0.275; p<0.05). Largest negative correlations were found between urea and distance from front teats (r=-0.289; p<0.05), and also between urea and back udder height( r=-0.275; p<0.05). Moreover bigger negative correlation were found between SCC and udder distance from the ground (r=-0.307; p