动物营养学报Issue(10)：3094-3101,8.DOI:10.3969/j.issn.1006-267x.2015.10.014
半胱胺对育成期雄性水貂生长性能、营养物质消化率及氮代谢的影响
Effects of Cysteamine on Growth Performance, Nutrient Digestibility and Nitrogen Metabolism of Male Minks in Growing Period
摘要
Abstract
This experiment was conducted to investigate the effects of cysteamine on growth performance, nu-trient digestibility and nitrogen metabolism of male minks in growing period. The experiment was designed in a double factorial experiment, and fifty-six healthy male minks aged (86±5) days were randomly divided into 7 groups with 8 replicates per group and 1 mink per replicate. The minks in control group ( groupⅠ) were fed a basal diet, the minks in groupsⅡ,ⅢandⅣwere continuously fed the experimental diets which supplemented with 60, 90 and 120 mg/kg cysteamine on the basis of the basal diet ( air-dry basis) , respectively, and the groups Ⅴ,Ⅵ andⅦ were fed the same diets with groupsⅡ,Ⅲ andⅣ, respectively, but at interval supple-mentation ( continuously supplemented 1 week and at interval of 1 week) . The adaptation period lasted for 7 days and the formal period lasted for 53 days. The results showed as follows:1) the final weight, average dai-ly gain and average daily feed intake of interval supplementation group were significantly higher than those of continuous supplementation group ( P<0.05 or P<0.01) . The average daily feed intake of 90 mg/kg group was significantly higher than that of 60 mg/kg group (P<0.05), and the feed/gain of 60 and 90 mg/kg groups was significantly lower than that of 120 mg/kg group (P<0.05). There were no significant interactions on growth performance indices between cysteamine supplemental way and supplemental level (P>0.05). 2) the dry matter and ether extract digestibility of interval suppletentation group were significantly higher than those of continuous supplementation group (P<0.05 or P<0.01). Cysteamine supplemental level had no significant effects on all nutrient digestibility ( P>0.05) , but the highest values of them were found in 90 mg/kg group. There were no significant interactions on all nutrient digestibility between cysteamine supplemental way and supplemental level ( P>0.05) . 3) Cysteamine supplemental way and supplemental level had significant effects on nitrogen intake ( P<0.05) , but had no significant effects on fecal nitrogen and urinary nitrogen excretion, net protein utilization and biological value of protein ( P>0.05) . The way of interval feeding had significantly higher nitrogen intake than continuous feeding (P<0.01), and the group supplemented with 90 mg/kg cys-teamine had significantly higher nitrogen intake than supplemented with 60 mg/kg cysteamine ( P<0. 05 ) . There was significant interaction on urinary nitrogen excretion between cysteamine supplemental way and sup-plemental level ( P<0.05) . Considering above all indices, the cysteamine in diets for male minks in growing period is appropriate to add at the level of 90 mg/kg at interval supplementation ( continuously suplemented 1 week and at interval of 1 week).关键词
水貂/半胱胺/生长性能/营养物质消化率/氮代谢Key words
mink/cysteamine/growth performance/nutrient digestibility/nitrogen metabolism分类
农业科技引用本文复制引用
樊燕燕,孙伟丽,孙皓然,王卓,张婷,李光玉..半胱胺对育成期雄性水貂生长性能、营养物质消化率及氮代谢的影响[J].动物营养学报,2015,(10):3094-3101,8.基金项目
中国农业科学院科技创新工程经费资助 （）
