Effect of urea multinutritional molasses block supplementation on liveweight change of yak calves and productive and reproductive performances of yak cows

	Effect of urea multinutritional molasses block supplementation on liveweight change of yak calves and productive and reproductive performances of yak cows
	Dong SK ; Long RJ ; Kang MY ; Pu XP ; Guo YJ
刊名	canadian journal of animal science
	2003
卷号	83 期号:1 页码:141-145
关键词	productivity reproductive performance UMMB supplementation yak
合作状况	其它
中文摘要	using three different types of yaks, 30 head of 1-yr-old calves (liveweight 60.7 +/- 6.3 kg), 30 head of 2-yr-old calves (97.7 +/- 10.2 kg) and 30 head of yak cows (160.2 +/- 15.1 kg) were randomly selected from the same yak herds. each type of yak herd was divided into control (c) and trial (t) groups using a completely randomized design, with 10 and 20 animals in the c and t groups, respectively. the animals in the c group were grazed on natural rangeland, and the animals in the t group were supplemented with urea multinutritional molasses blocks (ummb), together with grazing on natural rangeland from january to may of 1998. the objective was to determine the effect of ummb on productive performance of yak calves and yak cows in the cold season. live weight loss of 1-yr-old calves, 2-yr-old calves and yak cows was reduced by 1.2, 8.3 and 7.9 kg after ummb supplementation (p < 0.01). the 1-yr-old calves gained the most in the first month of supplementation, but the 2-yr-old calves and yak cows gained the most both in the first and last supplementation months. daily milk yield of yak cows increased by 0.21 kg d(-1) when the lactating animals were supplemented with ummb (p < 0.01), although there was no effect (p < 0.01) of ummb supplementation on hair and downy hair production. supplementation with ummb also improved reproductive performance of yak cows, with 8.8 and 30.9% increments in pregnancy rate and newborn weight, respectively. we conclude that the benefit of ummb supplementation the 1-yr-old calves was not economical, with only 0.3:1 output to input ratio, but supplementation of the 2-yr-old calves and yak cows may be economical, with 1.8:1 and 1.4:1 output to input ratios, respectively.
学科主题	动物学
收录类别	SCI
语种	英语
公开日期	2009-12-10 ; 2011-06-22
内容类型	期刊论文
源URL	[http://ir.nwipb.ac.cn/handle/363003/1413]
专题	西北高原生物研究所_中国科学院西北高原生物研究所
推荐引用方式 GB/T 7714	Dong SK,Long RJ,Kang MY,et al. Effect of urea multinutritional molasses block supplementation on liveweight change of yak calves and productive and reproductive performances of yak cows[J]. canadian journal of animal science,2003,83(1):141-145.
APA	Dong SK,Long RJ,Kang MY,Pu XP,&Guo YJ.(2003).Effect of urea multinutritional molasses block supplementation on liveweight change of yak calves and productive and reproductive performances of yak cows.canadian journal of animal science,83(1),141-145.
MLA	Dong SK,et al."Effect of urea multinutritional molasses block supplementation on liveweight change of yak calves and productive and reproductive performances of yak cows".canadian journal of animal science 83.1(2003):141-145.