| 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 highersignificantly 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. |
