Abstract: Eight pairs of Duchangda ternary piglets with an average body weight of about 22 kg were selected. The male and female babies were randomly divided into two treatment groups: the experimental group and the control group. Each treatment group had 5 replicates, and each replicate was 8 pigs. The control group was fed a basal diet + colistin sulfate 50 mg/kg + chlortetracycline 75 mg/kg, and the experimental group was fed a basal diet + ETP168 100 mg/kg. The results showed that the average daily weight gain of the experimental group was 4.7% higher than that of the control group (P<0.05). The ratio of feed to meat was significantly lower than that of the control group (P<0.05), and the average daily feed intake was not significant. Tests have shown that ETP168 can effectively improve the feed conversion rate of growing pigs and promote the production performance of growing pigs.
Key words: ETP168; iRetopene; production performance
How to improve the feed utilization rate of growing pigs and reduce the cost of feeding has always been the focus of the aquaculture industry. It is a common method to achieve antibacterial growth by adding antibiotics to the feed, but antibiotic residues are a serious threat to food quality and safety and human health. Look for a new additive without residue and safety instead of antibiotic additives to improve livestock and poultry. Production performance is an urgent problem to be solved. This experiment aims to provide a theoretical basis for the development, application and promotion of antibiotic-free feed by studying the effects of ETP168 on the performance of growing pigs.
1 Materials and methods
1.1 experimental design
The experiment was designed according to single factor and multiple replicates. Eight healthy growing pigs of Du Changda ternary with an average initial body weight of 22 kg were selected. According to the principle of similar body weight and similar genetic basis, they were randomly divided into experimental group and control group. 5 repetitions, each repeating 8 pigs, half male and half female. The control group was fed with basal diet + colistin sulfate 50 mg/kg + chlortetracycline 75 mg/kg, the experimental group basal diet + ETP168 100 mg/kg, and the test period was 45 days.
1.2 test materials
ETP168 is a gift from the neighboring Houcheng Biotechnology (Beijing) Co., Ltd., product batch number-1. The main components of ETP168 are iritofin and organic chromium.
1.3 test management
The experiment was conducted from May 7, 2011 to June 23, 2011 at the self-supporting Wantou Pig Farm of Yangchen Animal Husbandry Co., Ltd., Ankang City, Shaanxi Province. The test pigs were fed in a closed pig house with a concrete floor and good ventilation. During the test period, the materials were fed once a day in the morning and afternoon, free to eat and drink, and disinfected, dewormed and immunized according to the routine procedures of the farm.
Table 1 Basic diet composition and nutritional level
Note: 1 Premix contains: 20g of CuSO4, 12.5g of FeSO4, 11.5g of ZnSO4, 2.5g of MnSO4, 1.5g of 1% Na2Se2O3, 1% KI 5g, VA 800,000 IU, VD3 1.36 million IU, VE 6.8 million IU The nutritional levels of VK 44mg, VB1 44mg, VB2 160mg, calcium 244mg, niacin 440mg, VB620mg, VB12 40mg, folic acid 80mg, and choline 13g 2 were all calculated values.
Table 2 Test group and additive amount (g / t)
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