Correlation between body measurements and milk production of goats in different lactations

Abstract

This paper presents the results of the variability and correlation of body measurements and milk production of domestic Balkan goat breed that is reared in the mountain range Sharplanina, depending on the lactation. Studied animals were monitored and lactation, or order of kidding (I, II, III and IV and the next lactation together). Control of milk production, included a total of 290 goats in different lactations (first-81 animals, the second-69 heads, 71 heads third-and fourth and following along latkacije-69 heads). In order to determine the measure of body development in adult goats, one takes values for height at withers, body length, chest depth, chest width, the width of the cross and body weight. The variability of the analyzed characteristics is presented descriptive parameters and the effect of lactation is determined by a factorial analysis of variance. The determined average values for milk production and measures of body development are located within those identified for this population of goats. During these tests showed statistically significant correlation dependence (P lt 0.05) between all studied variables, except when it comes to length lactation period and individual measures of body development. The correlation coefficient between length of lactation and established measures of body development. are low and reflect the existence uncorrelation dependence, and their values range from 0.08 to 0.11, while they were unjustified and statistically (P> 0.05).

U radu su prikazani rezultati ispitivanja varijabilnosti i povezanosti osobina telesne razvijenosti i mlečnosti domaće balkanske rase koza u zavisnosti od laktacije po redu (I, II, III a IV i naredne laktacije zajedno). Kontrolom proizvodnje mleka bilo je obuhvaćeno ukupno 290 koza u različitim laktacijama (prva- 81 grla, druga- 69 grla, treća- 71 grla, a četvrta i naredne latkacije zajedno- 69 grla). U cilju utvrđivanja mera telesne razvijenosti odraslih koza izmerene su vrednosti za visinu grebena, dužinu trupa, dubinu grudi, širinu grudi, širinu krsta i telesnu masu. Varijabilnost analiziranih osobina opisana je parametrima deskriptivne statistike, a uticaj laktacije po redu je utvrđen jednofaktorijalnom analizom varijanse. Utvrđene prosečne vrednosti za proizvodnju mleka i mere telesne razvijenosti bile se u okviru onih koje su utvrđene za ovu populaciju koza. Ispitivanjem su utvrđene statistički značajne korelacije (P lt 0,05) između svih posmatranih parametara, izuzev kada je u pitanju dužina laktacionog perioda i pojedinih mera telesne razvijenosti koje statistički nisu bile značajne.