博落回提取物对雪峰乌骨鸡雏鸡生长性能和血清生化指标及肠道形态的影响

Effects of Macleaya cordata extract on growth performance,serum biochemical indexes and intestinal morphology of Xuefeng black-bone chicks

将1日龄雪峰乌骨鸡504只随机分为3组,每组设置8个重复(每个重复21只),试验期42 d,其间,对照组饲喂基础日粮,试验组Ⅱ(组Ⅱ)、试验组Ⅲ(组Ⅲ)分别在基础日粮中添加666、1332 mg/kg博落回提取物(MCE),以探究饲粮中添加MCE对育雏阶段雪峰乌骨鸡生长性能、血清生化指标及肠道形态的影响。结果表明:组Ⅱ和组Ⅲ雏鸡的体质量、日增质量和日采食量均极显著(P<0.01)高于对照组的,组Ⅱ的分别提高了7.2%、8.0%、3.4%,组Ⅲ的分别提高了9.5%、10.3%、5.3%;组Ⅱ和组Ⅲ的料重比相较于对照组的分别下降了4.0%和4.4%;43日龄时,组Ⅱ和组Ⅲ的血清尿素氮水平极显著(P<0.01)低于对照组的,分别降低了26.2%和27.5%,组Ⅲ的血清总蛋白水平显著(P<0.05)高于对照组和组Ⅱ的,分别提高了58.9%和41.3%;添加MCE极显著(P<0.01)提高了十二指肠的绒毛高度(VH)、绒毛高度与隐窝深度比值(VH/CD),显著(P<0.05)降低了隐窝深度(CD),组Ⅱ和组Ⅲ十二指肠的VH分别提高了12.6%、13.6%,CD分别下降了10.5%、14.7%,VH/CD分别提高了25.5%、32.9%;组Ⅲ空肠的VH/CD比对照组和组Ⅱ的分别显著(P<0.05)增加了6.2%和2.6%。可见,饲粮中添加MCE有助于改善雪峰乌骨鸡雏鸡的肠道形态,促进饲粮中营养物质消化吸收并提高雏鸡的生长性能。

To study the effects of dietary supplementation of Macleaya cordata extract(MCE)on the growth performance,serum biochemical indexes and intestinal morphology of Xuefeng black-bone chicks during the brooding stage,a total of 5041-day-old Xuefeng black-bone chicks were randomly divided into 3 groups,each with 8 replicates(21 birds each replicate),and the experimental period was 42 d.During this period,the control group was fed the basal diet,and the experimental groupⅡ(groupⅡ)and the experimental groupⅢ(groupⅢ)were supplemented with 666,1332 mg/kg MCE in the basal diet,respectively.The results showed that the body weight,daily gain,and daily feed intake of chicks in groupⅡand groupⅢwere significantly(P<0.01)higher than those in control group,and those in groupⅡincreased by 7.2%,8.0%and 3.4%,respectively,and those in groupⅢincreased by 9.5%,10.3%and 5.3%,respectively.Compared with control group,the feed-to-weight ratio of groupⅡand groupⅢdecreased by 4.0%and 4.4%,respectively.At 43 days of age,the serum urea nitrogen level of groupⅡand groupⅢwere significantly(P<0.01)lower than that of control group,which decreased by 26.2%and 27.5%,respectively;the serum total protein level of groupⅢwas significantly(P<0.05)higher than those of control group and groupⅡ,which increased by 58.9%and 41.3%,respectively.The addition of MCE significantly(P<0.01)increased the villus height(VH)and the ratio of villus height to crypt depth(VH/CD)of the duodenum and significantly(P<0.05)decreased the crypt depth(CD)of the duodenum.The VH of the duodenum of groupⅡand groupⅢincreased by 12.6%and 13.6%,their CD decreased by 10.5%and 14.7%,and their VH/CD increased by 25.5%and 32.9%,respectively.Compared with the control group and groupⅡ,the VH/CD of the jejunum of groupⅢwere significantly(P<0.05)increased by 6.2%and 2.6%,respectively.Our results suggested that the treatment of MCE in the diet could increase the intestinal morphology of Xuefeng black-bone chicks,promote the digestion and absorption of nutrients in the diet,and improve the growth performance of the chicks.