[The economical justification of provocation the artificial lactation in dairy-cows]
1984
Mendler, Z.
The artificial provokeness of lactation by hormone preparatus is made on 41 cows and 2 heifers. It is attain the average production of 3501 kg of milk during 260 days of lactation on cows retained in production, which is 53.18% of production attaind in previous natural lactation for the same milking period. Two heifers attain the milk production of 4020 kg for 304 days of lactation, which is 64.81 % of real primiparous cow production in 1979. The milk production varies from 912 to 10477 kg of milk for 550 days, which is 94.2 % of the previous natural lactation for the same milking period. The maximum of milk production is attained later than in natural lactation. All conditions of illness effected negatively the production and time of exploitation and this could be taken into consideration while selecting cows. The time of previous period of nonlactation does not influence the lactation indication. Cow milkiness in artificially provoked lactation is significantly dependant on its milkiness in previous natural lactation. The efficiency of milk production in artificially provoked lactation depends on all those factors that influence the milk production in normal lactations and after that on expenses for measures of artificially caused lactation, and at last, on cow milkeness during artificially provoked lactation.
Mostrar más [+] Menos [-]Palabras clave de AGROVOC
Información bibliográfica
Este registro bibliográfico ha sido proporcionado por Unassigned data from Yugoslavia
