Effects of non-genetic factors on daily milk production in Awassi breed of sheep in Macedonia

Pacinovski, Nikola and Dzabirski, Vladimir and Nakov, Dimitar and Porcu, Koco and Trajchev, Metodija and Cilev, Goce and Joshevska, Elena (2016) Effects of non-genetic factors on daily milk production in Awassi breed of sheep in Macedonia. The Journal "Agriculture and Forestry", 62 (4). ISSN 0554-5579

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Abstract

Several basic – fixed factors on daily milk yield have been examined in
total of 132 Awassi breed sheep, during two – year production period (2011 and
2012). The examination includes the following factors: lactation number,
lactation type, date of milk recording, number of newborn lambs, month or year
of milk recording and length of suckling period. Their influence on individual
milk yield measured in morning, afternoon and evening milking, total daily milk
yield and percentage of milk fat has been examined. A total of 904 lactation tests
in sheep, aged from first to eight lactation were included in the research. All data
were analyzed using a multi-factorial fixed model.
The influence of certain factors was studied using the F-test. Analyzes
were made using the SSPS set of programs. Most of the factors (number of
lactation, date of milk recording, month or year of milk recording and length of
suckling period), except the number of newborn lambs or fertility, had a highly
significant influence (P<0.01) on daily milk production (milk from the morning,
afternoon and evening and total amount of milk, as well as % of milk fat) in
examined breed of sheep. Highest daily milk production was determined among
sheep in sixth lactation and lowest among those in eighth lactation. On the other
hand, the highest percentage of milk fat was determined among sheep in seventh
lactation and the lowest among those in second lactation.
Three types of lactation curve were identified in examined sheep of which
most abundant is the one with one peak. These data suggest that the Awassi
breed, as breed with high milk production, retains the level of high and standard
milk production to an older age, which is a prerequisite for profitable and
sustainable livestock production.
Keywords: Awassi, daily milk yield, influence of factors, lactation curve

Item Type:	Article
Impact Factor Value:	0,654
Subjects:	Agricultural Sciences > Animal and dairy science Agricultural Sciences > Veterinary science
Divisions:	Faculty of Agriculture
Depositing User:	Dimitar Nakov
Date Deposited:	18 Nov 2022 11:30
Last Modified:	18 Nov 2022 11:34
URI:	https://eprints.ugd.edu.mk/id/eprint/30507

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