Effect of the Lactation Months on Milk Composition of the Second-Parity Lacaune Ewes
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Kuupäev
2021
Kättesaadav alates
Ajakirja pealkiri
Ajakirja ISSN
Köite pealkiri
Kirjastaja
Estonian University of Life Sciences
Abstrakt
This research aims to determine the chemical composition of Lacaune ewe milk
produced in Estonia, as well as the correlations and the influence the stages of lactation have on
milk. The study was carried out on fifty-one second-parity ewes. The analysis involved a total of
178 milk samples collected monthly from the second to the seventh month of lactation. Milk
analyses included the determination of the contents of total solids, fat, total protein, casein, casein
index, lactose, ash, P, Ca, K, Na, Mg, somatic cell count and pH. The Lacaune ewes’ milk
contained on average 18.62% total solids, 7.75% fat, 5.74% total protein, 4.32% casein,
4.76% lactose, 0.89% ash, 160.26 mg 100 g
-1 Ca, 140.07 mg 100 g
-1 P, 135.21 mg 100 g
-1 K,
46.44 mg 100 g
-1 Na, 17.66 mg 100 g
-1 Mg. Overall means for casein index, pH value and
somatic cell scores were 75.35%, 6.61 and 12.62, respectively. It was found that the month of
lactation significantly affected almost all monitored traits except somatic cell score, casein index
and Ca content. The contents of total solids, fat, total protein, casein, ash, P, and Mg increased,
while the lactose content, and pH value decreased with the advancing lactation. Sodium content
was highest and potassium content lowest value during mid-lactation. Producers must take into
account that the composition of Lacaune ewe milk depends on the stage of lactation and may,
therefore, affect the production process and the final quality of the product.
Kirjeldus
Received: February 24th, 2021 ; Accepted: December 22nd, 2021 ; Published: December 22nd, 2021 ; Correspondence: vilma.tatar@emu.ee
Märksõnad
ewe milk, chemical composition, stage of lactation, articles