摘要
本研究采用析因法确定内蒙古白绒山羊生绒期锌的需要量。研究4种不同日粮锌水平(Ⅰ组2 8.2 3 mg/kg、Ⅱ组5 0 mg/kg、Ⅲ组7 0 mg/kg、Ⅳ组1 0 0 mg/kg),对生绒期绒山羊机体锌代谢情况的影响以及体锌蓄积情况。结果表明:①进食锌量与排泄锌量之间呈直线回归关系,其回归公式为:y=0.766 2x+0.094 4(R2=0.958 5,P=0.000 1,n=9),由此确定生绒期绒山羊锌的维持需要量为0.094 4 mg/(d.kg)活体重(liveweight,LW);②生绒期绒山羊增重1 kg机体沉积98.04 mg锌,每长1 kg被毛沉积110.87 mg的锌。析因法确定总锌需要量为8.04 mg/d。
In our study, the factorial methods was used to determine the zinc requirements of the growing Inner Mongolian White Cashmere castrated bucks during the anagen periods. Effects of four dietary zinc levels （28.23 mg/kg for group Ⅰ , 50 mg/kg for group Ⅱ ,70 mg/kg for group Ⅲ, 100 mg/kg for group Ⅳ） on metabolism zinc and deposited zinc in different tissues of Cashmere castrated bucks during the anagen period were investigated, the result showed that the linear regression relationship between zinc intake and zinc excretion was established, and the regression equation as follows, y = 0. 766 2x ＋ 0. 094 4 （R^2 = 0. 958 5, P = 0. 000 1, n = 9）, The Zn maintenance requirement of Cashmere Goats during the anagen period was 0. 094 4 mg/（d · kg） LW. 98.04 mg of dietary zinc was retented in animal when 1 kg body weight gained; and 110,87 mgof dietary zinc was retented when 1 kg extra fleece grown. The zinc requirements of Cashmere Goats during the anagen period were 8.04 mg/d which was estimated by the factorial method.[Chinese Journal of Animal Nutrition, 2007,19（6）：684-690]
出处
《动物营养学报》
CAS
CSCD
北大核心
2007年第6期684-690,共7页
CHINESE JOURNAL OF ANIMAL NUTRITION
基金
教育部"全国优秀博士学位论文作者资助项目"
编号200056
关键词
锌
需要量
绒山羊
生绒期
Zinc
Requirement
Cashmere goats
Anagen period
