Document Detail

Effects of different PUFAs supplementation during the postpartum periods of early Lactating Dairy Cows on: Milk Yield, Metabolic Responses and Reproductive Performance.
MedLine Citation:
PMID:  23148256     Owner:  NLM     Status:  Publisher    
In spite of the difficulties to deliver PUFAs to ruminants, studies have generally indicated that the PUFA of the omega-6 (linoleic acid) and omega-3 [a-linolenic acid; eicosapentaenoic (EPA), C20:5 omega-3; docosahexaenoic (DHA), C22:6 omega-3] families are the most beneficial to improving reproduction in cows. The objectives were to determine if a diet enriched in α-linolenic acid (omega-3), or linoleic acid (omega-6) would influence milk production and composition, metabolic status and reproductive performance in lactating dairy cows. High-yielding multiparous Holstein dairy cows (n = 120) with no overt clinical illnesses were blocked according to calving date and parity. Cows were assigned randomly to be fed: 1) soybean whole roast (S, omega-6 n = 40), or 2) linseed (L, omega-3, n = 40), or 3) palm oil as a source of saturated fatty acid (C, n = 40) from calving until first heat after d 40 postpartum (dpp) and then half of the cows in each treatment group were switched to receive either linseed (L) or saturated fatty acid (C) from first heat after d 40 to 120 dpp. Blood were collected from a subsample of cows. Blood was collected at 14 d intervals for 12 wk, starting on the d of calving. Result showed milk yield and dry matter intake were not affected. Milk compositions were similar among diets except concentration and yield of milk fat percentage that was lower in cows fed L (P < 0.05). Uterine involution in cows fed soybean whole roast occurred earlier (P < 0.05). Diets affected d to first estrus and d to first insemination in cows (P < 0.05). There were no differences among treatments for percent heat detection, percent pregnancy per first insemination and percent conception per AI at estrus. Also, There is a trend of pregnancy by 120 d being 66.7% for the L group versus 50.91% for the C group (P < 0.08). Of the 4 pregnancy losses 2 occurred in CC and 2 occurred in SC and none in the other 4 treatments. In conclusion, our study showed feeding omega-6 fatty acids during 40 dpp could be a good treatment for early postpartum periods and shift to omega-3 fatty acids until 40 d after A.I can be consider as a strategy for improving fertility in lactating dairy cows.
E Dirandeh; A Towhidi; S Zeinoaldini; M Ganjkhanlou; Z Ansari Pirsaraei; A Fouladi-Nashta
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Publication Detail:
Type:  JOURNAL ARTICLE     Date:  2012-11-12
Journal Detail:
Title:  Journal of animal science     Volume:  -     ISSN:  1525-3163     ISO Abbreviation:  J. Anim. Sci.     Publication Date:  2012 Nov 
Date Detail:
Created Date:  2012-11-13     Completed Date:  -     Revised Date:  -    
Medline Journal Info:
Nlm Unique ID:  8003002     Medline TA:  J Anim Sci     Country:  -    
Other Details:
Languages:  ENG     Pagination:  -     Citation Subset:  -    
Department of Animal Science, University of Tehran, Karaj, Alborz, Iran.
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