TITLE:
Effect of Tannin in Green Tea By-Product in Combination with Bio-Char Supplemented into Basal Beef Cattle Diet on Nutrient Digestibility, Methane Production and Animal Performance
AUTHORS:
M. A. Khoa, N. H. Quang, T. V. Thang, T. V. Phung, T. T. Kien
KEYWORDS:
Green Tea By-Product, Bio-Char, Tannin, Methane Emission, Animal Performance
JOURNAL NAME:
Open Journal of Animal Sciences,
Vol.8 No.3,
June
26,
2018
ABSTRACT: The experiment was conducted by using 20 bulls of
Lai Sind cattle (a cross breed between Red Sindhi and local Vietnam yellow
cattle) from 15 - 16
months of age, weighed approximately 154 - 156 kg, housed individually with provision of
adequate feed trough and free access to water to evaluate the effect of tannin
sourced from green tea by-product
and addition of bio-char on methane production and animal performance. The
experimental diets were formulated by replacing elephant grass in basal diet by
bio-char and green tea by-product with the replacement of 0.5 - 1 bio-char and 3% - 5% green tea by-products, respectively to make the
content of tannin in the diet of 7.3 g and 12.5 g tannin
per kg dry matter. Results from this study revealed that bio-char and green tea
by-product included into the diet with
different levels had significantly affected on the feed intake, as the
increasing level of tannin in the diet tended to increase the feed intake. The
inclusion of green tea by-product
in the diet which resulted in the content of tannin in the diet of 12.5 g/kg DM had significantly
reduced methane emission without altering animal performance, thus the
inclusion of 0.5% bio-char and 5% of green tea by-product can be applied in order to
mitigate methane emission, thus contributed to environment protection.