Journal of Animal Science and Technology – Vol 120. February, 2021

09/03/2021

CONTENTS	Page
OVERVIEW
Rabbit production under global crisis of climate change and Covid - 19 pandemic	2
Nguyen Van Thu
ANIMAL FEEDS AND NUTRITION
Effects of tributyrin in diet on egg performance and quality of hens in the late stage of laying cycle	16
Le Thanh Phuong and Nguyen Thi Thuy
Effect of dietary levels of concentrate supplemention on feed intake and nutrient digestibility of crossbred cattle (Brahman ´ Zebu) from 13-15 months of age in An Giang province	24
Nguyen Binh Truong
Effects of Metabilizable energy to protein ratios in diet at 1 to 21 days of age on production performance and carcass characteristics of F1 Mia × Luong Phuong chicken	31
Nguyen Thi Bich Dao, Tran Thanh Van, Nguyen Duc Truong andNguyen Hung Quang
Effects of superoxide dismutase and catalase supplementation on semen quality of multi-spurs chicken in liquid storage	39
Bui Thi Hoang Yen, Dang Hoang Lam, Nguyen Thi Ha Phuong, Ngo Thi Tham and Nguyen Viet Don
A response of nutrient intakes, feed conversion ratio and digestion of meat rabbits on dietary fiber levels	50
Nguyen Thi Kim Dong and Nguyen Van Thu
ANIMAL PRODUCTION AND TECHNOLOGY
Economic efficiency in beef cattle production under diferent systems at Western Highland of Vietnam	57
Pham Van Gioi, Pham Van Son, Tran Thi Minh Hoang and Do Thi Thanh Van
Human and social capital in promoting livelihood for beef cattle production households in Dien Bien province	74
Ly Thi Thuy Duong, Le Thi Thanh Huyen, Nguyen Huu Nhuan, Pham Van Hung, Bui Van Quang, Stephen Ives and Robyn Eversole
Preliminary results on in vitro gas production impacted by different faecal sources of animal species used as inocula	83
Nguyen Van Thu
Polymorphisms of candidate genes and their association with intramuscular fat in Duroc pig	90
Hoang Thi Thuy, Pham Thu Thao, Giang Thi Thanh Nhan, Nguyen Van Hung, Tran Xuan Manh, Doan Van Soan and Pham Doan Lan
Preliminary results of investigated uirne purine derivatives and microbial nitrogen systhesis of domestic herbivores selected in Mekong delta of Vietnam	99
Nguyen Binh Truong and Nguyen Van Thu