Journal of Animal Science and Technology – Vol 139. June, 2023

27/07/2023

CONTENTS	Page
OVERVIEW
Smart agri-systems for the pig industry	2
Vo Van Su (collection)
Practical aspects of twin pregnancy diagnosis in cattle	16
Vo Van Su (collection)
Heat stress in poultry	25
Vo Van Su (collection)
Biological treatment of crop residues as an option for feed improvement in tropics	33
Nguyen Van Quang (collection)
Grassland-based livestock farming and biodiversity	44
Nguyen Van Quang (collection)
ANIMAL FEEDS AND NUTRITION
A response of growth performance, nutrient digestibility and nitrogen retention of growing female rabbits to levels of Psophocarpus scandens vines in diets	65
Nguyen Thi Kim Dong and Nguyen Van Thu
Effect of banana stems (Musa sapientum L) fermented with molasses, biochar and with or without vinasse on weight growth of muscovy duck (Cairina moschata)	71
Dao Thi My Tien
Determination of optimal ratio for total digestible sulfur-containing amino acids to lysine in Ross 308 broilers from 1 to 14 days of age	79
Nguyen Thi Bich Dao, Nguyen Duc Truong and Nguyen Hung Quang
ANIMAL PRODUCTION AND TECHNOLOGY
Preliminary results of utility for Wagyu and Red Angus bull's straw frozen semen on Zebu crossbred cows in Thai Binh province, Vietnam	89
Pham Van Gioi, Pham Van Tiem, Dang Van Dung, Vu Chi Thien and Tran Thi Minh Hoang