Journal details
Effects of concentrate supplement on the onset of post-partum oestrus in dairy cows
Published Date: 30 Dec 2015
Keywords: Concentrate, production, post-partum estrus in cow.
Muhammad Aminul Islam1, Md. Faruk Islam*2, Begum Fatema Zohara2, Fahima Binthe Aziz3,
Md. Golam Shahi Alam1 and Jalal Uddin Ahmed1
1Department of Surgery and Obstetrics, Bangladesh Agricultural University, Mymensingh 2202, Bangladesh, 2Department of Medicine, Surgery and Obstetrics, Hajee Mohammad Danesh Science and Technology University, Dinajpur-5200, Bangladesh, 3Department of Physiology and Pharmacology, Hajee Mohammad Danesh Science and Technology University, Dinajpur-5200, Bangladesh
Abastract:
Objectives: The study was conducted to evaluate the effect of blood glucose on the body weight gain, milk yield and post-partum onset of oestrus in cows.
Materials and Methods: A total of 10 cross breed cows with same age, parity and post-parturient stage were divided as control A (n=5) and treated B (n=5) groups at Bangladesh Agricultural University Dairy Farm. Standard rations with 0.5 kg concentrate and 4kg green grass were supplied in treated group. The body weight changes were measured and blood sample was collected at 10 days interval.
Results: The initial mean value of blood glucose was 2.0± 0.2 and 2.4 ± 0.1 mmol/L just after parturition in group A and group B, respectively. The highest values of blood glucose were 2.4 ± mmol/L and 3.7 ± 0.3 mmol/L, and the onset of post-partum oestrus was 90.120 (104±11.4) and 80-100 (88.0 ± 8.4) days in groups A and B, respectively. The difference of onset of post partum estrus between two groups of cows were statistically significant (p<0.01). The daily weight gain in two groups on an average were 78.8 ± 8.0 g and 176.0 ± 11.0 g, where the net body weight gain were 3.77% (9.4 ±1.3 kg) and 8.19% (21.2 ± 1.6 kg), respectively. The body weight gain of treated cows was significantly (p<0.01) higher than the control one. The linear improvement in the milk yield was observed up to 70th day of lactation. Milk yield was significantly (p<0.01) higher in treated cows (3.7 ± 0.3 lit./day) than that of control (3.1 ± 0.2lit./day).
Conclusion: It is concluded that cows fed with higher concentrates had increase milk yield and higher level of glucose in blood which might have positive influence in the brain to regulate gonadal activity and shortened post partum periods in cows.