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大蒜、杜仲饲料添加剂对雏鸡肠道微生物和生产性能的影响
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摘要
选用375只15日龄黄羽肉鸡,研究大蒜、杜仲单一添加及大蒜+杜仲混合添加对15~56日龄黄羽肉鸡的生产性能和肠道微生物的影响。在基础日粮中分别添加大蒜粉(3%);杜仲粉(3%);大蒜粉(1.5%)+杜仲粉(1.5%);金霉素(50mg/kg)。试验分为两个阶段15~35日龄;36~56日龄。两阶段基础日粮不同,但添加的添加剂水平及种类均一致。结果表明:试验前期,大蒜、大蒜+杜仲组的平均日增重与对照组相比分别提高8.9%和6.0%,且差异极显著(P<0.01),与金霉素组相比分别提高4.1%和1.3%,差异不显著(P>0.05);试验后期,大蒜组、大蒜+杜仲组的平均日增重与对照组相比分别提高9.5%、7.9%和6.2%,且差异极显著(P<0.01),与金霉素组相比分别提高3.0%和1.6%,差异不显著(P>0.05);杜仲组与对照组相比提高3.0%,差异显著(P<0.05);试验全期,大蒜组、大蒜+杜仲组的平均日增重与对照组相比分别提高9.1%和6.9%,且差异极显著(P<0.01),与金霉素组相比分别提高7.2%和5.0%,且差异极显著(P<0.01)。添加大蒜、杜仲等添加剂对平均日采食量、饲料效率、每公斤增重饲料成本、平均每只鸡所获毛利影响显著。其中大蒜组相比对照组和金霉素组平均日采食量分别提高6.3%和2.8%,分别差异极显著(P<0.01)和显著(P<0.05);大蒜+杜仲组采食量比对照组提高4.1%,差异显著(P<0.05)。饲料效率:与对照组相比,大蒜组在试验前期、后期和全期的料肉比分别降低2.2%、2.8%、2.5%,且差异极显著(P<0.01);大蒜+杜仲组在试验前期、后期和全期的料肉比分别降低2.2%、3.2%、2.5%,且差异极显著(P<0.01):杜仲组前期饲料效率显著高于对照组(P<0.05),后期和全期差异不显著(P>0.05);金霉素组前期差异不显著,后期和全期饲料效率极显著高于对照组(P<0.01)。试验期平均每只鸡所获毛利:与对照组相比,在鸡日粮中添加杜仲、金霉素可使平均每只所获毛利分别提高1.8%和4.4%,且差异显著(P<0.05);添加大蒜和大蒜+杜仲混合物可使平均每只鸡所获毛利分别提高6.8%和7.3%,且差异极显著(P<0.01)。同时试验结果还表明,添加大蒜、杜仲、大蒜+杜仲的试验组,对肠道大肠杆
    
    菌有显著抑制作用(尸<0.01或尸<0.05),金霉素组在前期对大肠杆菌有极显著抑制作
    用,后期则影响不显著。除金霉素组前期对乳酸杆菌有显著影响(尸<0.01)外,其余
    各组对乳酸杆菌无显著影响(尸>.05)。上述结果表明,在黄羽肉仔鸡日粮中加入大蒜、
    大蒜+杜仲可显著促进黄羽肉鸡的生长,提高采食量、饲料效率和经济效益;同时可明
    显抑制肠道中大肠杆菌等致病菌的生长繁殖,改善肠道微生态环境:可利用大蒜和杜仲
    作饲料添加剂取代金霉素等抗生素添加剂。
Three hundred and seventy-five yellow feather meat chicks of 15-day-old, were used to investigate the intestinal flora and performance of broiler effects respectively supplementing allum sativum (AS) , Eucommia ulmoides Oliv. (EUO) andAS+EUO.
    AS(3%),EUO(3% ),AS(1.5% )+EUO(1.5% )and Chlortetracycline(CTC)(50mg/kg) respectively supplemented on basic diets.The two stages experiment which the chicks were fed a different basic diet and same drug treatment were 15-3 5-day-old and 36~56-day-old.The results showed that Average Daily Gain(ADG)of AS group andAS+EUO group significantly improved respectively 8.9% and 6.0% comparing with control group (P < 0.01) in the 1st stage.it improved respectively 4.1% andl.3% comparing with CTC group which was not remarkable (P>0.05) . During the 2nd stage, ADG of AS group and AS+EUO group and CTC group significantly improved respectively 9.5%,7.9% and 6.2% comparing with the control group(P < 0.01) but it improved respectively 3.0% andl .6% comparing with CTC group which was not remarkable (P>0.05 ) .During the whole period ADG of AS group and AS+EUO group and CTC group significantly improved respectively 9.1% and 6.9% comparing with the control group (P < 0.01) .It was significantly improved respectively 7.2% and 5.0
    % comparing with the CTC group (P < 0.01) .It was significantal effect for Average Feed Daily Intake( AFI),Feed Conversion Efficiency(FCE),the feed cost per kilogram weight gain and the profit a chick created by supplementing allum sativum, Eucommia ulmoides Oliv. ect.Among treatments ADG of AS group improved respectively 6.2% (P < 0.01) and 2.8% (P < 0.05) comparing with the control group and CTC group; feed ingest of AS+EUO group significantly improved 4.1% comparing with the control group (P < 0.01) .The FCE of AS group was significantly reduced respectively 2.2%,2.8%,2.5% comparing with the control group (P < 0.01) in the 1st,the 2ndand the whole stage;and FCE of EUO group was higher
    
    
    
    significantly than control group (P < 0.01) in the 1st stage,but it was not remarkable in the 2ndand the whole stage (P < 0.05) ; FCE of CTC group was not higher significantly than control groupin the 1st stage, but it was remarkable in the 2ndand the whole stage (P < 0.01) . The result of profit an chick created as follows: The profit an chick created of AS group and CTC group improved respectively 1.8% and 4.4% comparing with control group (P < 0.05) ; AS group and AS+EUO group improved respectively 6.8% and 7.3% comparing with control group (P < 0.01) .Moreover, the results showed that E.coli was inhibited significantly among the AS group , EUO group and AS+EUO group (P < 0.05 or P < 0.01) . CTC inhibited E.coli in rectum in 1st stage significantly (P < 0.01), but the effect was not significant in 2nd
    (P >0.05) . Lactobacillus was not inhibited significantly for other test group (P > 0.05) except for by CTC in 1st stage (P < 0.01) .
    In a word , the results indicated that it could increase the growth rate , the feed intake , FCE and economy benefit of broilers significantly by supplementing allum sativum (AS) , Eucommia ulmoides Oliv. (EUO) and AS+EUO. what is more, E.colis upgrowth could was inhibited significantly, the flora in intestinal ameliorated; therefore, it is possible to replace antibiotics such as CTC ect.with AS and EUO as feed additive.
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