National Academy of Agricultural Sciences (NAAS)
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PRINT ISSN : 2319-7692
Online ISSN : 2319-7706 Issues : 12 per year Publisher : Excellent Publishers Email : editorijcmas@gmail.com / submit@ijcmas.com Editor-in-chief: Dr.M.Prakash Index Copernicus ICV 2018: 95.39 NAAS RATING 2020: 5.38 |
A study was conducted on twelve apparently healthy Sahiwal cows selected from National Dairy Research institute’s livestock herd. The cows were divided into two groups i.e. persistent and truncated based on their records of milking. The blood and milk samples were collected on 15, 30, 45, 60, 75, 90, 105, 120 days postpartum. Plasma glucose concentration was higher (P<0.05) in truncated than persistent cows on 60th and 120th days postpartum as well as between the days within same group. Plasma NEFA concentration was significantly higher (P<0.05) in truncated than persistent cows as well as between the days. Plasma cortisol was significantly higher (P<0.05) in truncated than Persistent cows. Plasma cortisol also varied (P<0.05) between the periods. Plasma GH was higher (P<0.05) in persistent than truncated cows but did not vary between periods. Plasma Oxytocin concentration did not vary significantly between animals as well as periods. Milk α-LA was higher (P<0.05) in persistent than truncated cows. Milk α-LA did not vary significantly between periods. Milk lactoferrin was higher (P<0.05) in persistent than truncated cows and also varied significantly between periods (P<0.05). It is concluded that the hormones such as GH andcortisol may have an effect on the persistency of lactation. Plasma metabolites like glucose, NEFA and milk proteins such as α-LA and lactoferrin could also be associated with the persistency of lactation which is not merely a function of livestock management.
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