动物营养学报2016，Vol.28Issue(11)：3602-3610,9.DOI:10.3969/j.issn.1006-267x.2016.11.029
不同蛋白质和脂肪水平颗粒料对冬毛期水貂生长性能、营养物质消化率、氮代谢和毛皮品质的影响
Effects of Granulated Feeds with Different Protein and Fat Levels on Growth Performance, Nutrient Digestibility, Nitrogen Metabolism and Fur Quality of Minks in Pelting Period
摘要
Abstract
This study was designed to investigate the effects of granulated feeds with different protein and fat levels on growth performance, nutrient digestibility, nitrogen metabolism and fur quality of minks in pelting period. Seventy⁃two (135±5)⁃day⁃old healthy male minks were divided into 6 groups and each group had 12 minks. Six experimental diets were prepared by double factorial experimental design with 34% crude protein ( CP) and 18% ether extract ( EE) ( group Ⅰ) , 34% CP and 16% EE ( group Ⅱ) , 32% CP and 18% EE ( group Ⅲ) , 32% CP and 16% EE ( group Ⅳ) , 30% CP and 18% EE ( group Ⅴ) , 30% CP and 16% EE ( group Ⅵ) , respectively, and all of them were made into granulated feeds. The pre⁃test period lasted for 7 days, and the trial lasted for 60 days. The results showed as follows: the average body weight ( ADG ) in groups Ⅰ and Ⅲ was significantly higher than that in groups Ⅱ, Ⅳ and Ⅵ (P<0.01). Minks in 18% fat group had significantly higher final body weight than 16% fat group (P<0.05), and the ADG in 18% fat group was significantly higher than that in 16% fat group ( P<0.01) . The minks in group Ⅵ had significantly lower protein digestibility than the others group (P<0.01), and 18% fat group had the same trend compared with 16% fat group ( P<0.01) . The protein digestibility in 34% and 32% protein groups was significantly high⁃er than that in 30% protein group ( P<0.01) . Nitrogen retention and protein biological value in group Ⅱ were significantly higher than those in group Ⅳ ( P<0.05) , the net protein utilization in groups Ⅱ, Ⅲ and Ⅵ was significantly higher than that in groupⅥ( P<0.05) . Dietary fat level had no significant effects on nitrogen me⁃tabolism related indices of minks ( P>0.05) , while dietary protein level had significantly effect on the net pro⁃tein utilization of minks ( P<0.05) . The live body length of minks in 34% and 32% protein groups was signifi⁃cantly higher than that in 30% protein group ( P<0.05) . The fur length of minks in 34% protein group was sig⁃nificantly longer than that in 30% protein group ( P<0.05) , but the dietary fat and protein levels and the inter⁃action of protein and fat levels had no significant effect on the fur long ( P>0.05) . Considering all the results, dietary fat level affects the final body weight of minks in pelting period, and the protein level affects the live body length. In the condition of this experiment, minks in pelting period have the optimized growth perform⁃ance and fur quality when fed granulated feeds with 18% fat and 32% to 34% protein.关键词
蛋白质/脂肪/水貂/生长性能/毛皮品质/颗粒料Key words
protein/fat/minks/growth performance/fur quality/granulated feed分类
农业科技引用本文复制引用
张铁涛,孙皓然,杨雅涵,娜仁花,王凯英,李光玉,高秀华..不同蛋白质和脂肪水平颗粒料对冬毛期水貂生长性能、营养物质消化率、氮代谢和毛皮品质的影响[J].动物营养学报,2016,28(11):3602-3610,9.基金项目
中国农业科学院特种动物营养与饲养创新团队项目 （）
