Research on Various Testing Procedures and Different Methods of Estimating Lactation Milk Yield in Dairy Cattle

Autor:	KAYA, Attila, UZMAY, Can, AKBAŞ, Yavuz, KAYA, İbrahim
Jazyk:	turečtina
Rok vydání:	2014
Předmět:	fluids and secretions Testing intervals estimation methods 305 d milk yield dairy cattle food and beverages
Zdroj:	Volume: 26, Issue: 1 193-199 Turkish Journal of Veterinary and Animal Sciences
ISSN:	1300-0128 1303-6181
Popis:	This research was carried out to determine the effect of various milk sampling intervals and different methods on the accuracy of estimation of lactation milk yield in dairy cattle. Individual daily milk weights of 599 Holstein, Simmental and Brown Swiss lactations from the Aegean Agricultural Research Institute were used. It was assumed that test-day milk yields were obtained by regular and irregular intervals of 28 d and 56 d, with the irregular intervals having a standard deviation of 5 d. From test-day milk yields, 305 d milk yields were estimated by the Holland (Lactation yield = mean of test day yields x lactation duration (days)) and Test Interval methods. It was found that the bias of estimation increased significantly (P
Databáze:	OpenAIRE
Externí odkaz:	https://explore.openaire.eu/search/publication?articleId=tubitakulakb::d80587698ea4812406d27e4e1c9748a4 https://dergipark.org.tr/tr/pub/tbtkveterinary/issue/12564/152028 Zobrazit plný text záznamu