Effects Of Enzyme Complex On Growth Performance And Nutrient Utilization Of Broilers

Two experiments was conducted to study the practical technology of enzyme complex products preparation supplemented in broiler diets.Experiment1:A scheme of single factor test was used in this experiment.432 Arbor Acres male broilers at zero day-old age were randomly divided into 6 groups each with 6 replications of 12 broilers to study effects of supplement amount(g/t)of enzyme products A and P with 6 combine (0,0;500,0;350,150;250,250;150,350;0,500)respectively in a diet of corn/soybean/rapeseed-cottonseed meal(crumbled feed)on growth performances and digestibility and retention of nutrients for broilers during 0-6 weeks The results show:0～3W,The feed intake for treatⅢwas higher than that of treatⅠ(P<0.01)andⅡ,Ⅴ(P < 0.05),ADG of treatⅢwas higher than forⅡ(P < 0.01) significantly,Feed conversion rate(FCR)of treatⅤwas better thanⅡ(P>0.05).During 3-6 weeks old .there were no influence in feed intake and ADG among 6 groups,FCR of treatsⅢwas worse than control. Dry matter and Acid detergent fiber digestion(DMD,ADFD)for treatⅤhigher thanⅠ(P < 0.01),Neutral detergent fiber digestion(NDFD)of all groups added enzymes higher than that ofⅠ(P<0.01)exceptⅢ,Hemicellulose digestion(HCELD)for treatⅤ,Ⅱhigher thanⅠ(P<0.01),Nitrogen retention(NR) for treatⅡandⅤtrend to be higher than that ofⅠ(P=0.219,0.155),and energy retention of treatⅡ(P<0.05),Ⅴ(P=0.080)was higher thanⅠ.The amounts of dropping for all groups added with the enzymes products were decreased, and the amount of treatⅢ,Ⅴwere the least.4-6weeks.There were no apperent influence in DMD and NR among treatments.ADFD of treatⅢ,Ⅳwere higher than that ofⅡ,Ⅳ,Ⅴ(P<0.01),Ⅰ's higher thanⅡ's(P<0.01) and lower thanⅥ'(P<0.01).0～3W,The faecal excretion were decreased after added enzymes,contrast to control faecal excretion of treatⅤdecreased largest .But there were no significant influence among treatments on dropping in 4-6 weeks(P>0.05).Experiment2:It was designed as analyzable reasoned experiment of double factors with three level. Factor A was different additive levels of enzymes(A:P=1:2)(A1A2A3 received basal diets supplement with enzyme at 0,250,500g/t,respectively).Factor B was two levels of corn/soybean/rapeseed-cottonseed meals basic diets(B1were 7%,B2were 15%).the diets was powder.396 broilers were randomly allotted six treatments (each inconclude 6 replications that involved in 11boilers).Study the effects of on growth performance and nutrient utilization between additive levels of enzymes and two basic diets of broilers at 0-3weeks of age.The result show:There were no significant influence on feed intake,ADG and FCR of boilers among A,B and A×B(P>0.05).but FCR with enzymes were better than control(P>0.05).The lively weight of 3w'and ADG of A3B2 had higher than the other treats(P=0.181,0.183).DMD and energy retention of B2 lower than B1(P<0.01).But ADFD,NDFD,HCELD higher than largelyB1(P<0.01).There were no influence between B1 and B2 in NR(P>0.05) and no influence on amounts of dropping among A,B and A×B.