CAJ | 학술논문

本试验旨在研究饲粮脂肪水平对哺乳期水貂生产性能和血液生化指标的影响。选择健康哺乳母貂及其仔貂60窝，随机分为4组，每组15个重复，每个重复1窝。4组哺乳母貂饲喂蛋白质水平（45％）相同，脂肪水平分别为14．43％（Ⅰ组）、18．80％（Ⅱ组）、22．77％（Ⅲ组）和26．89％（Ⅳ组）的试验饲粮。试验期为45 d。结果表明：1）9、18、27、45日龄仔貂平均体重均以Ⅱ组最高，其中9日龄时显著高于Ⅳ组（ P＜0．05），18日龄时显著高于Ⅰ、Ⅳ组（ P＜0．05），27日龄时显著高于其他各组（ P＜0．05），45日龄时显著高于Ⅰ和Ⅳ组（ P＜0．05）。Ⅳ组母貂平均体重在仔貂9、18、27、45日龄时均为最高，其中9、27日龄时显著高于其他各组（ P＜0．05），18日龄时显著高于Ⅰ、Ⅱ组（P＜0．05），45日龄时显著高于Ⅱ组（P＜0．05）。各日龄仔貂成活率在各组间均差异不显著（P＞0．05），但45日龄时以Ⅱ和Ⅲ组较高。2）饲粮脂肪水平对母貂血清中总蛋白、白蛋白、葡萄糖和甘油三酯含量的影响不显著（ P＞0．05）。随着饲粮脂肪水平的升高，母貂血清尿素氮含量逐渐降低，具体表现为Ⅱ、Ⅲ、Ⅳ组极显著高于Ⅰ组（ P＜0．01），Ⅳ组还极显著高于Ⅱ、Ⅲ组（P＜0．01），Ⅱ、Ⅲ组之间差异不显著（P＞0．05）；母貂血清中总胆固醇、高密度脂蛋白和低密度脂蛋白含量均随着饲粮脂肪水平的升高呈上升趋势，其中总胆固醇和高密度脂蛋白含量表现为Ⅰ、Ⅱ组显著低于Ⅲ、Ⅳ组（ P＜0．05），低密度脂蛋白含量表现为Ⅰ组显著低于Ⅲ、Ⅳ组（ P＜0．05）。由此得出，本试验条件下，水貂哺乳期饲粮适宜脂肪水平为18．80％。
본시험지재연구사량지방수평대포유기수초생산성능화혈액생화지표적영향。선택건강포유모초급기자초60와，수궤분위4조，매조15개중복，매개중복1와。4조포유모초사위단백질수평（45％）상동，지방수평분별위14．43％（Ⅰ조）、18．80％（Ⅱ조）、22．77％（Ⅲ조）화26．89％（Ⅳ조）적시험사량。시험기위45 d。결과표명：1）9、18、27、45일령자초평균체중균이Ⅱ조최고，기중9일령시현저고우Ⅳ조（ P＜0．05），18일령시현저고우Ⅰ、Ⅳ조（ P＜0．05），27일령시현저고우기타각조（ P＜0．05），45일령시현저고우Ⅰ화Ⅳ조（ P＜0．05）。Ⅳ조모초평균체중재자초9、18、27、45일령시균위최고，기중9、27일령시현저고우기타각조（ P＜0．05），18일령시현저고우Ⅰ、Ⅱ조（P＜0．05），45일령시현저고우Ⅱ조（P＜0．05）。각일령자초성활솔재각조간균차이불현저（P＞0．05），단45일령시이Ⅱ화Ⅲ조교고。2）사량지방수평대모초혈청중총단백、백단백、포도당화감유삼지함량적영향불현저（ P＞0．05）。수착사량지방수평적승고，모초혈청뇨소담함량축점강저，구체표현위Ⅱ、Ⅲ、Ⅳ조겁현저고우Ⅰ조（ P＜0．01），Ⅳ조환겁현저고우Ⅱ、Ⅲ조（P＜0．01），Ⅱ、Ⅲ조지간차이불현저（P＞0．05）；모초혈청중총담고순、고밀도지단백화저밀도지단백함량균수착사량지방수평적승고정상승추세，기중총담고순화고밀도지단백함량표현위Ⅰ、Ⅱ조현저저우Ⅲ、Ⅳ조（ P＜0．05），저밀도지단백함량표현위Ⅰ조현저저우Ⅲ、Ⅳ조（ P＜0．05）。유차득출，본시험조건하，수초포유기사량괄의지방수평위18．80％。
This experiment was conducted to study the effects of dietary fat level on performance and blood bi-ochemical parameters of minks during lactation period. A total of 60 litters of healthy lactation minks and their kids were randomly allocated to 4 groups with 15 replicates per group and 1 litter per replicate. Minks in the 4 groups were fed 4 experimental diets that contained 14. 43%( groupⅠ),18. 80%( group Ⅱ),22. 77%(group Ⅲ)and 26.89%(group Ⅳ)fat,respectively,and the protein level(45%)of the 4 experimental di-ets was the same. The experiment lasted for 45 days. The results showed as follows:1)the average body weight of kids at 9,18,27 and 45 days of age in groupⅡwas the highest,and it was significantly higher than that in groupⅣat 9 days of age,in groupsⅠandⅣat 18 days of age( P<0.05),in other groups at 27 days of age and in groups Ⅰ and Ⅳ at 45 days of age( P<0.05). The average body weight of female minks in group Ⅳ was always the highest when kids were at 9,18,27 and 45 days of age,and it was significantly higher than that in other groups at 9 and 27 days of age( P<0.05),in groupsⅠandⅡat 18 days of age( P<0.05)and in group Ⅱ at 45 days of age( P<0.05). At different days of age,the survival rate of kids had no significant difference among all groups( P>0.05),but groups Ⅱ and Ⅲ had the highest survival rate at 45 days of age. 2)The contents of total protein,albumin,glucose and triglyceride in serum of female minks were not significantly affected by dietary fat level( P>0.05). With dietary fat level increasing,the serum urea nitro-gen content of female minks was decreased,and that in groupsⅡ,ⅢandⅣwas significantly higher than that in group Ⅰ( P<0.01),as well as that in groupⅣwas significantly higher than that in groupsⅡandⅢ( P<0.01),but no significant difference was found between groups Ⅱ and Ⅲ( P>0.05). The contents of choles-terol,high density lipoprotein and low density lipoprotein in serum of female minks had an increasing trend with dietary fat level increasing,and the contents of total cholesterol and high density lipoprotein in serum in groupsⅠandⅡwere significantly lower than those in groupsⅢandⅣ( P<0.05),while the serum low den-sity lipoprotein content in groupⅠwas significantly lower than that in groupsⅢandⅣ( P<0.05). In conclu-sion,the optimal fat level of minks during lactation period is 18.80% under the conditions of this experiment.