摘要
为探讨紫貂泌乳期饲粮适宜的能量浓度与蛋白质水平,本研究选用90只产仔紫貂进行3(GE:4900,5300和5700Kcal/kg)×3(CP:40,45和50％)二因子交叉饲养试验和代谢试验。试验结果表明,以仔兽体重和消化、代谢参数为主要指标,紫貂泌乳期饲粮适宜的GE浓度和CP水平分别应为4900～5300Kcal/kg和40％～45％,且互作效应最好的组合力GE4900Kcal/kg×CP45％,其次是GE5300Kcal/kg×CPd5％、GE4900Kcal/kg×CP40％和GE5300Kcal/kg×CP40％。随着饲根GE浓度的提高,泌乳母貂断奶时体重相应提高,而日存留氮和氮存留率均逐渐降低。能量代谢率和氮存留率随着饲粮CP水平的提高而逐渐降低。
To inquire into optimal diet energy density and protein level in sable.3(GE: 4900,5300,5700Kcal /kg)×3(CP: 40%,45%,50%) two-facter cross-over feeding trial and metabolism trial were conducted wilh 90 sables in lactation period.Results showed :as main indexes with weight gain of offsprings and digestion and metabolism parameter,the optimal diet GE density and CP level in sable in lactation period were 4900-5300Kcal / kg and 40%-45% respectively,and (lid optimal interaction between dietary GE and CP were 4900Kcal / kg×45%,5300Kcal / kg x 45%,4900Kcal / kg x 40% and 5300Kcal / kg x 40% re-speciively.The weight of milking sables was increased wilh GE density increasing at weaning stage,while daily nitrogen retention and nitrogen retention rate were gradually decreased wilh GE density increasing.Energy metabolic rate and nitrogen retention rate were gradually decreased with CP level increasing.
出处
《动物营养学报》
CAS
CSCD
1996年第3期38-43,共6页
CHINESE JOURNAL OF ANIMAL NUTRITION
基金
国家饲料办"八.五"攻关课题内容之一
关键词
紫貂
泌乳期
能量浓度
蛋白质水平
氮沉积
Sable,Lactation period,Energy density,Protein level,Nitrogen Retention
