动物营养学报2016，Vol.28Issue(7)：2309-2316,8.DOI:10.3969/j.issn.1006-267x.2016.07.039
饲粮亚油酸水平对育成期蓝狐生长性能、营养物质消化率及氮代谢的影响
Effects of Dietary Linoleic Acid Level on Growth Performance, Nutrient Digestibility and Nitrogen Metabolism of Blue Foxes in Growing Period
摘要
Abstract
This study was conducted to study the effects of dietary linoleic acid level on growth performance, nutrient digestibility and nitrogen metabolism of blue foxes in growing period. Sixty male blue foxes aged about 90 days with similar body weight were randomly divided into 6 groups with 10 replicates per group and 1 fox per replicate. They were fed experimental diets with linoleic acid levels of 0.11% ( group Ⅰ) , 0.52% ( groupⅡ) , 0.92% ( groupⅢ) , 1.33% ( groupⅣ) , 2.14% ( groupⅤ) and 3.36% ( groupⅥ) , respectively. The adaptation period lasted for 7 days and the formal period lasted for 63 days. The results showed as follows:1) dietary linoleic acid level had significant effects on the average daily gain and feed/gain ( P<0.01) , but had no significant effect on the dry matter intake ( P>0.05) . The average daily gain was gradually increased with diet⁃ary linoleic acid level increased from 0.92% to 3.36%, while the feed/gain was gradually declined, but no sig⁃nificant differences were found in above indices between groupsⅣandⅤ( P>0.05) . 2) Dietary linoleic acid level had significant effects on the fat digestibility, carbohydrate digestibility and dry matter digestibility ( P<0.01) , but had no significant effect on the protein digestibility ( P>0.05) . The highest values of fat digestibili⁃ty and carbohydrate digestibility were found in group Ⅵ, and the highest value of dry matter digestibility was found in group Ⅴ, but no significant differences were found in above indices between groups Ⅳ and Ⅴ ( P>0.05) . 3) Dietary linoleic acid level had significant effects on fecal nitrogen, urea nitrogen and biological val⁃ue of protein (P<0.05 or P<0.01), but had no significant effects on nitrogen intake, nitrogen retention and net protein utilization ( P>0.05) . The fecal nitrogen in groupⅥ was the highest, but had no significant differ⁃ence compared with groups Ⅱ, Ⅳ and Ⅴ ( P>0.05); the urea nitrogen in group Ⅱ was the highest, but had no significant difference compared with groups Ⅲ, Ⅳ and Ⅴ ( P>0.05); the biological value of protein in group Ⅵwas the highest, and was significantly higher than that in groupⅡ( P<0.05) , but had no significant difference compared with other groups ( P>0.05) . By a comprehensive consideration on the terms of reducing environmental pollution and maintaining growth performance, dietary optimal linoleic acid level for blue foxes in growing period is 2.14%.关键词
亚油酸/蓝狐/生长性能/营养物质消化率/氮代谢Key words
linoleic acid/blue fox/growth performance/nutrient digestibility/nitrogen metabolism分类
农业科技引用本文复制引用
邢敬亚,钟伟,刘帅,陈明帅,张婷,孙皓然,樊燕燕,李光玉..饲粮亚油酸水平对育成期蓝狐生长性能、营养物质消化率及氮代谢的影响[J].动物营养学报,2016,28(7):2309-2316,8.基金项目
中国农业科学院科技创新工程；吉林省自然科学基金项目 （）
