Md.  Mahfujur Rahman, Mohiuddin  Abdul Kader, Md.  Mahi Uddin Riaz, Ahsan  Raquib, Sudeb  Saha, Md. Shahidur  Rahman Chowdhury, Md.  Bashir Uddin, Md.  Mukter Hossain, Md.  Rafiqul Islam, Md.  Masudur Rahman, 
    Effects of Diets Supplemented with Green Tea By-Product on Growth Performance and
Hematological Parameters in Calves,
    Journal of Animal and Veterinary Advances,
    Volume 20,Issue 1,
    2021,
    Pages 32-38,
    ISSN 1680-5593,
    javaa.2021.32.38,
    (https://makhillpublications.co/view-article.php?doi=javaa.2021.32.38)
    Abstract: The study aimed to explore the effect of Green
Tea by-product (GTB) on body weight and hematological
parameters in calves of the Sylhet region in Bangladesh.
Four replicate groups were attributed to each treatment
with three calves per replicate. Each group numbered
as T<sub>1</sub>, T<sub>2</sub>, T<sub>3</sub> and T<sub>0</sub>. All groups were served with
standard calf feed and fresh drinking water ad libitum.
The control group T<sub>0</sub> was fed with normal calves feed.
Calves of group T<sub>1</sub>, T<sub>2</sub> and T<sub>3</sub> were maintained as treated
group where group T<sub>1</sub> was fed with 0.5% GTB with
normal calves feed, group T<sub>2</sub> was treated with 1% GTB
and group T<sub>3</sub> was treated with 2% of GTB, respectively.
The body weight of calves was taken on day 0 of the
experiment and again on day 30 and day 60 to compare
with the initial body weight. Blood samples were
collected at day 30 and day 60 of treatment for
hematological and biochemical experiments. Body
weight was significantly (p<0.05) increased in treated
groups in comparison to the control group. GTB
improved Hb concentration and Total Protein (TP)
in treatment group T<sub>3</sub> which was significantly
(p<0.05) higher than that of control group T0. Effects
of green tea by-product on RBC, WBC and
glucose concentration results insignificant (p<0.05)
enhance in the treated groups compared to the
control group. Cholesterol, albumin and BUN
concentration were decreased significantly (p<0.05)
in treated groups (T<sub>1</sub>, T<sub>2</sub> and T<sub>3</sub>). Our experimental
data suggested that GTB has a momentous effect on
body weight gain and physiological characteristics.
    Keywords: GTB;growth performance;hematological parameters;calf