Effect of Thi on Hormone Profile, Blood Metabolites, Milk Composition and BCS in Lactating Murrah Buffaloes
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Date
2020
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MAFSU, Nagpur
Abstract
In lactating buffaloes responses to THI and lactational stressors are
exhibited by alterations in the serum metabolites and hormones and milk
constituents along with alterations in the dam’s BCS. Since the overall effects of
lactation, environment and pregnancy on the buffalo are multifaceted, varied
physiological outputs must be studied in order to understand the impact on health
and productivity. THI elevations and lactational stages have been found to
influence the milk quality and quantity, raising the question of which of the
aforementioned variables are causing what effect on the lactating female.
Therefore, we negated one variable and kept all the fifteen buffaloes selected from
a single farm in Thane District open throughout the 210 days lactational study
period. Blood and milk samples were collected on day 7, day 14 and fortnightly
thereafter. The analysed data showed significant variations throughout lactation in
milk yield and its measured components (protein, lactose, SNF and fat). The
blood metabolites panel assessed (total proteins, albumin, globulin, A:G, urea,
creatine, glucose, SGPT, SGOT, calcium and magnesium), hormone profile (T3,
T4, IGF1, insulin, GH and cortisol) and BCS showed significant variations during
the 210 days lactation period, while serum phosphorus, chloride and leptin were
non-significant. The correlation between THI and the studied parameters was by
and large non-significant, except for insulin (positively correlated) and IGF1
(negatively correlated). This non-significant result could be due to the fact that
the lactation period was from July to February and therefore the buffaloes escaped
the summer heat stress.
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