发酵苹果渣对獭兔生长性能、养分消化率、小肠黏膜形态及分泌型免疫球蛋白A浓度的影响

Effects of Fermented Apple Pomace on Growth Performance,Nutrient Digestibility,Intestinal Mucosal Morphology and Secretory Immunoglobulin Concentration of Rex Rabbits

本试验旨在研究发酵苹果渣对獭兔生长性能、养分消化率、小肠黏膜形态及分泌型免疫球蛋白A(SIgA)浓度的影响。试验共选用96只、45日龄的健康獭兔,随机分为4组,每组4个重复,每个重复6只(公母各占1/2)。4组獭兔分别饲喂含0(对照,CK组)、9.6%(A组)、19.2%(B组)和28.8%(C组)发酵苹果渣的试验饲粮。预试期15 d,正试期50 d。结果显示:与CK组相比,C组獭兔平均日增重提高了14.69%(P <0.05),料重比降低了6. 63%(P <0. 05),腹泻率降低了19.64%(P<0.05); C组獭兔饲粮干物质、有机物、粗蛋白质和粗纤维消化率分别提高了6.11%(P<0.05)、5.19%(P<0.05)、7.26%(P<0.05)和13.10%(P<0.05); C组獭兔空肠的绒毛长度和肠壁厚度分别增加了59.82%(P<0.05)和41.83%(P<0.05),同时十二指肠的隐窝深度降低了30.52%(P<0.05)。添加不同水平的发酵苹果渣对獭兔小肠中SIgA浓度无显著影响(P>0.05)。综上所述,在饲粮中添加28.8%的发酵苹果渣可以通过提高养分消化率,改善小肠黏膜形态来提高獭兔的生长性能,并可降低腹泻率,且对小肠中SIgA浓度无不良影响。

The aim of the study was to evaluate the effects of fermented apple pomace on growth performance,nutrient digestibility,intestinal mucosal morphology and secretory immunoglobulin (SIgA) concentration of Rex rabbits. Ninety-six Rex rabbits at 45 days of age were randomly divided into 4 groups with 4 replicates per group and 6 rabbits (half male and half female) per replicate. Rabbits in the 4 groups were fed experimental diets which contained 0 (control,group CK),9.6%(group A),19.2%(group B) and 28.8%(group C) fermented apple pomace,respectively. The adaption period was 15 d,and the experiment period was 50 d. The results showed that the average daily gain of Rex rabbits in group C increased by 14.69%( P <0.05),the feed/gain decreased by 6.63%( P <0.05) and the diarrhea rate decreased by 19.64%( P <0.05) compared with group CK. The digestibility of dry matter,organic matter,crude protein and crude fibre in group C increased by 6.11%,5.19%,7.26% and 13.10% compared with group CK ( P < 0.05 ),respectively. The villus length and intestinal wall thickness of jejunum of Rex rabbits in group C increased by 59.82% and 41.83% compared with group CK ( P <0.05),respectively,and the crypt depth of duodenum decreased by 30.52% compared with group CK ( P <0.05). However,different supplemental levels of fermented apple pomace had no significant effect on intestinal SIgA concentration ( P >0.05). The results indicate that supplementation of fermented apple pomace at 28.8% can improve the growth performance by promoting nutrient digestibility and intestinal mucosal morphology of Rex rabbits,and can decrease the diarrhea rate,but no harmful effect on intestinal SIgA concentration.