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2009 | 27 | 4 |
Tytuł artykułu

Chemical composition, physical traits and fatty acid profile of goat milk as related to the stage of lactation

Treść / Zawartość
Warianty tytułu
PL
Skład chemiczny, cechy fizyczne i profil kwasów tłuszczowych mleka kóz w przebiegu laktacji
Języki publikacji
EN
Abstrakty
EN
The chemical composition and physical traits (selected) of milk, and fatty acid profile of milk fat were determined throughout the progress of lactation II in 20 Polish White Improved goats. From October to May goats were fed corn silage, hay and carrot ad lib., concentrate according to their milk yield, with mineral and vitamin premix, chalk and NaCl. From June to September hay was substituted by fresh grass. The diets were balanced according to INRA feeding standards. Milk samples were taken from each goat on lactation day 60, 120 and 200 (lactation stage 1, 2 and 3, respectively). With the progress of lactation highly favourable changes took place in the most desirable monounsaturated (MUFA) and polyunsaturated (PUFA) fatty acids content of a total of fatty acids. The coefficients of the calculated Pearson’s correlation showed that the concentration of MUFA and PUFA (including conjugated linoleic acid – CLA) which are most desirable from the nutritive point of view, is negatively correlated with the daily milk yield.
PL
Badania przeprowadzono na 20 kozach rasy polskiej białej uszlachetnionej, będących w drugiej laktacji. Dawki pokarmowe zestawiono zgodnie z normami INRA. W sezonie zimowym zwierzęta żywiono dawką złożoną z kiszonki z kukurydzy, siana, marchwi i koncentratu, w ilości dostosowanej do wydajności mleka. Ponadto kozy otrzymywały dodatki mineralno-witaminowe oraz kredę i sól pastewną. W sezonie letnim kiszonkę z kukurydzy zastąpiono zielonką z traw. Kozy dojono mechanicznie dwukrotnie w ciągu dnia. Próbki mleka każdej kozy pobrano w 60, 120 i 200 dniu laktacji (stadium 1, 2 i 3). Wraz z przebiegiem laktacji stwierdzono korzystne zmiany w profilu kwasów tłuszczowych (FA) w mleku – rósł udział kwasów jednonienasyconych (MUFA) i wielonienasyconych (PUFA). Oszacowane wskaźniki korelacji Pearsona wskazują, że koncentracja kwasów najkorzystniejszych z punktu widzenia wartości odżywczej, tj. MUFA, PUFA, w tym sprzężonego kwasu linolowego (CLA), była ujemnie skorelowana z dobową wydajnością mleka.
Słowa kluczowe
Wydawca
-
Rocznik
Tom
27
Numer
4
Opis fizyczny
p.311-320,ref.
Twórcy
  • Institute of Genetic and Animal Breeding, Polish Academy of Sciences, Jastrzebiec, 05-552 Wolka Kosowska, Poland
autor
  • Institute of Genetic and Animal Breeding, Polish Academy of Sciences, Jastrzebiec, 05-552 Wolka Kosowska, Poland
autor
  • Institute of Genetic and Animal Breeding, Polish Academy of Sciences, Jastrzebiec, 05-552 Wolka Kosowska, Poland
  • Institute of Genetic and Animal Breeding, Polish Academy of Sciences, Jastrzebiec, 05-552 Wolka Kosowska, Poland
  • Institute of Genetic and Animal Breeding, Polish Academy of Sciences, Jastrzebiec, 05-552 Wolka Kosowska, Poland
autor
  • Institute of Genetic and Animal Breeding, Polish Academy of Sciences, Jastrzebiec, 05-552 Wolka Kosowska, Poland
  • Institute of Genetic and Animal Breeding, Polish Academy of Sciences, Jastrzebiec, 05-552 Wolka Kosowska, Poland
Bibliografia
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  • CHILLIARD Y., ROUEL J., LEROUX C., 2006 – Goats alpha-s1 casein genotype influence its milk fatty acid composition and delta-9 desaturation ratios. Animal Feed Science and Technology 131,474-487.
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  • CZAUDERNA M., KOWALCZYK J., CHOJECKI G., 2001 – An improved method for derivatization of fatty acids for liquid chromatography. Journal of Animal and Feed Sciences 10, 369-375.
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  • EKNES M., HAVREVOLL O., VOLDEN H., HOVE K., 2009 – Fat content, fatty acid profile and off-flavours in goats milk – effects of feed concentrates with different fat sources during the grazing season. Animal Feed Science and Technology 152, 112-122.
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  • GAJDUSEK S., JELINEK P., PAVEL J., FIALOWA M., 1993 – Changes in composition of fattyacids of the fat in goat milk during lactation. Živočišna Výroba 38(9), 849-858.
  • GULATI S.K., BYERS E.B., BYERS Y.G., ASHES J.R., SCOTT T.W., 1997 – Effect of feeding different fat supplements on the fatty acid composition of goat milk. Animal Feed Science and Technology 66, 159-164.
  • HAENLEIN G.F.W., WENDORFF W.L., 2006 – Sheep Milk – Production and Utilization of Sheep Milk. In: Handbook of Milk of Non-Bovine Mammals. Blackwell Publishing Professional, Oxford,UK, and Ames, Iowa, USA, 137-194.
  • INRA-IZ Feeding Standard for Cattle, Sheep and Goats 2001 – National Research Institute of Animal Production, Cracow.
  • KANWAL R., AHMED T., MIRZA B., 2004 – Comparative analysis of quality of milk collected from buffalo, cow, goat and sheep of Rawalpindi/Islamabad region in Pakistan. Asian Journal of Plant Science 3, 300-305.
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  • SORYAL K., BEYENE F.A., ZENG S., BAH B., TESFAI K., 2005 – Effect of goat breed and milk composition on yield, sensory quality, fatty acid concentration of soft cheese during lactation. Small Ruminant Research 58, 275-281.
  • STRZAŁKOWSKA N., BAGNICKA E., JÓŹWIK A., KRZYŻEWSKI J., 2008 – Macro- and microelements concentration in goat milk during lactation. Zuchtungskunde 80 (5), 404-411.
  • TALPUR F.N., BHANGER M.I., MEMON N.N., 2009 – Milk fatty acid composition of indigenous goat and ewe breeds from Sindh, Pakistan. Journal of Food Composition and Analysis 22, 59-64.
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  • ZHANG R.H., MUSTAFA A.F., ZHAO X., 2006 – Effects of feeding oilseeds rich in linoleic and linolenic fatty acids to lactating ewes on cheese yield and on fatty acid composition of milk and cheese. Animal Feed Science and Technology 127, 220-233.
Typ dokumentu
Bibliografia
Identyfikatory
Identyfikator YADDA
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