关键词: 产奶量, 营养成份, 初乳, 常乳, 山羊

Abstract: Milk yield and nutritional components are two factors affecting the survival and growth speed of newborn lambs. In the present study, the milk yield and nutritional components of four goat breeds in Sichuan were analyzed. The results showed that their milk yields were (84.28 ± 5.11) kg (Tianfu goat), (81.90 ± 3.27) kg (Jianyang big ear goat), (80.63 ± 4.48) kg (Lezhi black goat) and (65.08 ± 2.43) kg (Yingshan black goat), respectively. The contents of dry materials and protein exhibited a sharp decrease within 48 h after parturition and fat content initially increased, then decreased and finally increased. No significant difference in lactose content in colostrums was observed, which ranged from 4% to 5%. The nutritional components at 2 h after parturition were ranked in the following order : Yingshan black goat ＞ Tianfu goat ＞ Lezhi black goat ＞ Jianyang big ear goat for protein level, Tianfu goat ＞ Yingshan black goat ＞ Lezhi black goat ＞ Jianyang big ear goat for dry materials, Lezhi black goat ＞ Jianyang big ear goat ＞ Tianfu meat goat ＞ Yingshan black goat for fat, Jianyang big ear goat ＞ Lezhi black goat ＞ Tianfu goat ＞ Yingshan black goat for lactose. The highest contents of protein and dry materials, fat and lactose in ordinary milk were observed in Tianfu goat, Yingshan blank goat and Jianyang big ear goat, respectively.

Key words: milk yield, nutritional components, colostrum, ordinary milk, goat