(1. Guangdong Ocean University Agriculture College, Guangdong Zhanjiang 524088
2. Zhuhai City Animal Husbandry and Veterinary Science and Technology Promotion Station, Zhuhai, Guangdong Province, 519000)
The objective of the study is to explore the effect of Composite enzymes and probiotics on production performance and nitrogen, phosphorus utilization of broiler.A total of 90 1-day healthy AA broilers were divided into 3 groups: control group, composite enzymes group and probiotics group,3 replicates in each group and 10 chicken in each replicate. The control group fed with basic diet , the composite enzymes and probiotics group were supplemented with basic diet added 0.5% composite enzymes and 0.1% probiotics respectively. The test period lasted for 6 weeks. The results showed that daily gain of the composite enzymes group and the probiotics group were enhanced 7.35%(P<0.05)and 2.71%(P>0.05)respectively during 1~21 days ,4.25%(P<0.05)and 5.55%(P<0.05)during 21~42 days ,5.19% (P<0.05) and 4.69%(P<0.05)during 1~42 days :feed to gain decreased 6.12%(P<0.05)and 4.08%(P<0.05)respectively during 1~21 days,5.00%(P<0.05) and 6.36% (P<0.05)during 21~42 days,6.06%and 5.56% during 1~42 days compared with the control group .The contents of Nitrogen and phosphorus were decreased 14.92%(P<0.05)and 11.30 %(P<0.05)respectively and the utilization of Nitrogen and phosphorus were decreased 15.11%(P<0.05)and 8.49%(P<0.05.The probiotics group was not significant(P>0.05) in the contents and the utilization of Nitrogen and phosphorus compared with the control group .
Key words; composite enzyme; probiotics; production performance ; nitrogen and phosphorus utilization