COMPARATIVE STUDY OF EAST BALKAN BOARS ON THE BASE OF THE REPRODUCTIVE ABILITY OF THE MATED BY THEM SOWS | Сравнителна оценка на нерези от Източнобалканската порода по репродуктивните способности на заплодените от тях свине
2010
Marchev, J., Agricultural Institute, Shumen (Bulgaria) | Palova, N., Experimental agricultural Centre, Sredez (Bulgaria)
A comparative assessment of 14 boars from the East Balkan breed on the base of the fertility and development of the offspring up to 21-day of age of the mated sows was performed. The data of the number and live weight of the newborn piglets of a litter and the number and live weight at 21-day of age of a litter was analyzed. Significant differences between studying boars on the average number of piglets born alive in litters of mated by them sows were established. The average live weight at birth - 976 g is in the physiological limits typical of the breed. Significant differences in the values between the boars offspring were estimated. The correlation between the live weight at birth and the survival rate of piglets up to 21-day of age has average value and shows that the survival rate depends on a complex of factors - manner of breeding and feeding, sows milk yield, health status etc.
显示更多 [+] 显示较少 [-]