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 |
The study was undertaken to determine and compare the activity of important enzymes and its correlation with milk production in cattle. The study was done on each of six Gir, Kankrej and Crossbred cattle. The animals were divided in to three groups viz. 0-90 days of lactation (Group I), 91-180 days of lactation (group II) and 181 till dry stage (group III). Blood was collected aseptically before and after milking and clear plasma was separated and stored until analyzed. The samples were analysed for endocrine parameters by RIA and IRMA method. Hormone levels were differed significantly between different breeds. Level of Insulin, and Prolactin were higher in Gir, whereas, Kankrej found with highest level of T3 and crossbred found with high concentration of cortisol. Hormone levels of T3 andT4 increased while prolactin decreased with advancement of lactation. The hormones studied found negative correlation with milk yield.
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