Abstract
Aim:The main objective of this study was to estimate the effect of supplementation of rumen-protected choline (RPC) and green tea extract (GTE) on production parameters in transition Karan Fries (KF) cows.Materials and Methods:The present experiment was carried out on 32 pregnant KF cows. In the control group, cows were fed basal diet. In T1, each cow was fed RPC (55 g/day), in T2 – GTE (3 g/d), and in T3– RPC + GTE (55+3) g/day along with basal diet. The duration of the experiment was 30 days before calving to 60 days after parturition.Results:Feeding of both RPC and GTE significantly increased milk yield (p≤0.01), 4% fat corrected milk yield (p≤0.01), milk fat (p≤0.01), and total solid content (p≤0.05) than control. There was no significant difference (p≥0.05) in milk protein, lactose, and solids not fat (SNF) content among the groups.Conclusion:Supplementing RPC and GTE in combination improved milk yield and fat content of the milk without altering protein, lactose content of the milk in transition KF cows.
Highlights
The transition period, roughly stretching from 3 weeks before to 3 weeks after parturition [1], is a most critical physiological period for high-yielding dairy cows, and is characterized by a high incidence of metabolic, infectious, and reproductive disorders [2,3]
This study aimed to explore the effect of supplementation of Rumen-protected choline (RPC) and green tea extract (GTE) on production parameters in transition cows
In Treatment 2 (T2), 4% fat corrected milk (FCM) increased statistically significantly (p≤0.01) than control, though no significant difference (p≥0.05) was obtained between Treatment 1 (T1) and T2 (Table-2)
Summary
The transition period, roughly stretching from 3 weeks before to 3 weeks after parturition [1], is a most critical physiological period for high-yielding dairy cows, and is characterized by a high incidence of metabolic, infectious, and reproductive disorders [2,3]. Increased demand of energy and nutrients for the synthesis of colostrum and milk along with decreased feed intake forced the transition cows to undergo negative energy balance (NEB). NEB along with severe oxidative stress leads to mobilization of fat in terms of non-esterified fatty acids and subsequent accumulation of beta-hydroxybutyric acid in blood [3]. Chemically beta-hydroxyethyltrimethylammonium ion, is synthesized endogenously and an integral part of biological tissues as cytoskeleton components [4]. Researchers have observed a tendency for higher milk
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