摘要
本试验旨在通过不同水平磷酸、柠檬酸、乳酸对水貂营养物质消化率、小肠绒毛形态及N、P环境排放量的比较,筛选适宜水貂使用的酸化剂种类及其水平。将健康、体重相近的雄性育成短毛黑水貂100只,随机分成10组,每组10只。对照组饲喂基础鲜料,Ⅱ~Ⅹ组分别在鲜料中添加0.4%、0.6%、0.8%磷酸;0.5%、1.0%、1.5%柠檬酸;0.5%、1.0%、1.5%乳酸。结果表明,各组间干物质采食量(DMI)及干物质(DM)、粗蛋白(CP)、钙消化率无显著差异(P>0.05),但随酸化剂添加而升高的趋势明显;Ⅰ、Ⅳ组粗脂肪(EE)消化率显著高于Ⅴ、Ⅸ、Ⅹ组(P<0.05);Ⅷ、Ⅸ组磷消化率极显著优于其他各组(P<0.01),Ⅸ组磷消化率最高;各组间水貂小肠绒毛高度差异不显著(P>0.05),Ⅷ组小肠绒毛平均高度最大,是最小的Ⅲ组的145.8%,是对照组的120.3%;不同处理组水貂小肠绒毛表面积差异不显著(P>0.05),但Ⅷ组小肠绒毛平均表面积最大,是最小的Ⅲ组的160.24%,是对照组的131.77%;各组间水貂小肠绒毛密度差异不显著(P>0.05);各组间水貂N环境排放量无显著差异(P>0.05),但添加酸化剂N环境排放量下降趋势明显,对照组比最低的Ⅷ组高34.02%;对P环境排放量影响极显著(P<0.001),Ⅷ组最低,比对照组低57.33%。综上表明:饲料酸化剂促进小肠绒毛发育、改善水貂营养物质消化率、降低环境氮、磷排放量作用明显,本研究范围内0.5%乳酸效果较好。
The experiment was carried out to investigate the effect of acidifiers with different levels in the same basal diet on intestinal villus morphology,nutrient digestibility and N,P excretion in growing mink.One hundred black male minks were randomly allotted into 10 treatment groups.Every group consisted of 10 minks.The control was fed conventional fresh diet,the testing groups were added acidifier,phosphoric acid 0.4%(Ⅱ),0.6%(Ⅲ)and 0.8%(Ⅳ),citric acid0.5%(Ⅴ),1.0%(Ⅵ)and 1.5%(Ⅶ),lactic acid 0.5%(Ⅷ),1.0%(Ⅸ)and 1.5%(Ⅹ),respectively.The results indicated that there were no significantly difference(P>0.05)in the DMI and digestibility of DM,CP and Ca among groups,but there were clearly increasing tendencies for these with acidifiers adding.The EE digestibility in groupⅠandⅣ were significantly higher than that in groupⅤ,Ⅸ,Ⅹ(P<0.05).The P digestibility in groupⅧandⅨ were higher than that inother groups(P<0.01),and Ⅸ group was the best.The height of intestinal villus was similar(P>0.05)among groups,and Ⅷ group was the highest,it was 145.8% and 120.3% compared to group Ⅲ and Ⅰ.The average surface area of intestinal villus had not significantly different(P>0.05)among groups,however,it in Ⅷ group were 160.24% and 131.77% respectively to groupⅢ andⅠ.There were no significantly different(P>0.05)in the density of intestinal villus;The N excrention was similar(P>0.05)among groups and the decrease tendencies with acidifiers addition was clearly,the group Ⅰ was higher 34.02% than group Ⅷ.The quantity of P excrention was significantly different(P<0.001),group Ⅷ was the lowest and fewer 57.33% than groupⅠ.The results showed that it can significantly improve the activity of nutrient digestion and intestinal villus morphology and decrease N,P excretion,by adding 0.5% of lactic acid during hair growth period in mink diets.
出处
《畜牧兽医学报》
CAS
CSCD
北大核心
2015年第4期665-671,共7页
ACTA VETERINARIA ET ZOOTECHNICA SINICA
基金
国家公益性行业(农业)科研专项(200903014)
吉林省科技发展计划重点项目(20110230)
关键词
酸化剂
水貂
小肠绒毛
消化利用率
N、P排放量
acidifier
mink
intestinal villus morphology
nutrient digestibility
N,P excretion
