International Journal of Pure & Applied Bioscience (IJPAB)
Year : 2017, Volume : 5, Issue : 6
First page : (1056) Last page : (1064)
Article doi: http://dx.doi.org/10.18782/2320-7051.5429
Effect of Niacin Supplementation on Nutrient Utilization and Blood Biochemical Parameters in Crossbred Cows during Heat Stress
Nazam Khan1*, S. K. Gupta2, Vikas Mahajan3 and Suraj Amrutkar4
National Dairy Research Institute, Karnal, Haryana 132 001, India
Present address: 1,3&4Assistant Professor, ILFC, SKUAST-J, 2Head, ILFC, SKUAST-J
*Corresponding Author E-mail: drnazamkhan@yahoo.com
Received: 13.07.2017 | Revised: 11.08.2017 | Accepted: 15.08.2017
ABSTRACT
The present study was conducted in eighteen crossbred early lactating cows (2nd to 4th lactation; 11.56±1.74 days in milk) to investigate the effect of different levels of niacin supplementation on nutrient utilization and blood biochemical profile during heat stress period (April to August; 120 days). The animals were divided into three groups of six animals each on the basis of milk production and body weight. The basal ration was fed same to all cows, except the addition of niacin @ 600 and 800 mg/kg dry matter intake (DMI) in T1 and T2 groups, respectively. The temperature humidity index (THI) was calculated at 07:30 am and 02:30 pm daily. At the end of experimental feeding, a digestibility trial was conducted to estimate the digestibility of nutrients and their balance. Fortnightly body weights were recorded and blood was collected at day 0 and then at fortnightly intervals to study the blood biochemical profile. The results revealed that animals were in either moderate or severe stress at morning, whereas during afternoon the animals were in very severe stress during the entire trial. The mean dry matter intake (DMI; kg/d) was significantly (P<0.05) high in T1 (12.03) than C (11.78), but T2 has an intermediate value (11.89). But body weight, nutrient digestibility and nutrient balance (Ca and P) were similar in control and niacin supplemented groups. Likewise different blood parameters were found similar irrespective of different dietary treatments except total protein and albumin which was significantly higher (P<0.05) in T2 than C. It can be concluded that supplementation of niacin at 600 and 800 mg/kg DMI in the diet of lactating crossbred cows had no significant beneficial effect on nutrient utilization.
Key words: Crossbred cows, Niacin, Nutrient utilization, blood biochemical profile, Heat stress
Full Text : PDF; Journal doi : http://dx.doi.org/10.18782
Cite this article: Khan, N., Gupta, S.K., Mahajan, V. and Amrutkar, S., Effect of Niacin Supplementation on Nutrient Utilization and Blood Biochemical Parameters in Crossbred Cows during Heat Stress, Int. J. Pure App. Biosci.5(6): 1056-1064 (2017). doi: http://dx.doi.org/10.18782/2320-7051.5429
