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Paper Information

Journal:   ANIMAL SCIENCE RESEARCHES (FACULTY OF AGRICULTURE, UNIVERSITY OF TABRIZ)   2015 , Volume 25 , Number 3; Page(s) 167 To 186.
 
Paper: 

A META-ANALYSIS OF THE IMPACT OF PLANT OILS RICH IN 18:2N-6 ON DIGESTIBILITY, MILK PRODUCTION AND COMPOSITION IN LACTATING COWS

 
 
Author(s):  VAZIRIGOHAR M., REZAYAZDI K.*, DEHGHAN BANADAKY M., NEJATI JAVAREMI A.
 
* DEPARTMENT OF ANIMAL SCIENCE, CAMPUS OF AGRICULTURE AND NATURAL RESOURCES, UNIVERSITY OF TEHRAN, KARAJ, IRAN
 
Abstract: 

BACKGROUND: Including plant oils rich in unsaturated fatty acids in lactating cow diets can be used as a nutritional strategy to alter milk fatty acid composition for long-term human health.
OBJECTIVES: Effects of dietary plant oils rich in 18:2n-6 (POLA) on digestion, milk production and composition in lactating cows, using meta-analysis and meta-regression approach were evaluated.
METHODS: Twenty-five experiments containing 38 comparisons between treatment (with plant oils) and control (without plant oils) group, which met the selection criteria, were used. Two levels of supplementing POLA were evaluated:
£ and > 30 g/kg diet DM.
RESULTS: Overall, plant oils decreased dry matter intake (DMI) and increased milk production and the weighted mean differences were –0.30 and 0.32 kg/d, respectively, but the results were heterogeneous. Forage type of basal diet was the source of heterogeneity for standardized mean difference (SMD) of DMI, whereas dietary 18:2n-6 content differences between treatment and control diets explained the variation in results of milk yield. Feeding POLA up to 30 g/kg diet DM improved organic matter and fiber total-tract digestibility. Milk fat content and secretion lowered at both level of POLA inclusion, but milk protein and lactose output did not change. Amount of plant oil in the diet and milk yield differences between groups showed negative and positive influences on SMD of milk fat content and yield, respectively. CONCLUSION: Feeding POLA improved milk production efficiency with decreased DMI and increased milk production.

 
Keyword(s): LACTATING COW, META-ANALYSIS, MILK PRODUCTION, PLANT OIL
 
 
References: 
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Click to Cite.
APA: Copy

VAZIRIGOHAR, M., & REZAYAZDI, K., & DEHGHAN BANADAKY, M., & NEJATI JAVAREMI, A. (2015). A META-ANALYSIS OF THE IMPACT OF PLANT OILS RICH IN 18:2N-6 ON DIGESTIBILITY, MILK PRODUCTION AND COMPOSITION IN LACTATING COWS. ANIMAL SCIENCE RESEARCHES (FACULTY OF AGRICULTURE, UNIVERSITY OF TABRIZ), 25(3), 167-186. https://www.sid.ir/en/journal/ViewPaper.aspx?id=508659



Vancouver: Copy

VAZIRIGOHAR M., REZAYAZDI K., DEHGHAN BANADAKY M., NEJATI JAVAREMI A.. A META-ANALYSIS OF THE IMPACT OF PLANT OILS RICH IN 18:2N-6 ON DIGESTIBILITY, MILK PRODUCTION AND COMPOSITION IN LACTATING COWS. ANIMAL SCIENCE RESEARCHES (FACULTY OF AGRICULTURE, UNIVERSITY OF TABRIZ). 2015 [cited 2021May10];25(3):167-186. Available from: https://www.sid.ir/en/journal/ViewPaper.aspx?id=508659



IEEE: Copy

VAZIRIGOHAR, M., REZAYAZDI, K., DEHGHAN BANADAKY, M., NEJATI JAVAREMI, A., 2015. A META-ANALYSIS OF THE IMPACT OF PLANT OILS RICH IN 18:2N-6 ON DIGESTIBILITY, MILK PRODUCTION AND COMPOSITION IN LACTATING COWS. ANIMAL SCIENCE RESEARCHES (FACULTY OF AGRICULTURE, UNIVERSITY OF TABRIZ), [online] 25(3), pp.167-186. Available: https://www.sid.ir/en/journal/ViewPaper.aspx?id=508659.



 
 
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