Effects of Feed Processing Technology and Compound Probiotics on Growth Performance and Immune Function of Broilers

GE Chunyu, LI Junguo, DUAN Haitao, YANG Jie, HAN Qing, ZHANG Jiaqi, QIN Yuchang

doi:10.3969/j.issn.1006-267x.2018.09.039

Chinese Journal of Animal Nutrition >

2018 , Vol. 30 >Issue 9: 3681 - 3692

DOI: https://doi.org/10.3969/j.issn.1006-267x.2018.09.039

Molecular Nutrition

Effects of Feed Processing Technology and Compound Probiotics on Growth Performance and Immune Function of Broilers

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1. Feed Research Institute, Chinese Academy of Agricultural Sciences, Beijing 100081, China;
2. Institute of Food and Nutrition Development, Ministry of Agriculture, Beijing 100081, China;
3. The Key Laboratory of Feed Biotechnology of Ministry of Agriculture, Beijing 100081, China;
4. Institute of Animal Science, Chinese Academy of Agriculture Sciences, Beijing 100193, China

Received date: 2018-03-05

Online published: 2018-09-20

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Abstract

This study was conducted to evaluate the effects of different feed processing technologies on microbial survival rate of the compound probiotics and pellet feed processing quality, meanwhile to explorer the effects of feed processing technology and compound probiotics on growth performance and immune function of broilers. Eight hundred and sixty-four 1-day-old white feather Arbor Acres (AA) broilers were randomly divided into 6 groups with 8 replicates per group and 18 boilers per replicate. The experiment lasted for 42 days. The broilers' diets were processed by two kinds of processing technologies which were ordinary conditioning and pelleted feed processing technology (OT) and efficient conditioning at high temperature for feed ingredients and pelleted at low temperature feed processing technology (ET). Each processing technology set 4 treatments of the addition of chlortetracycline and compound probiotics as 0 and 0 mg/kg (0/0 group), 600 and 0 mg/kg (600/0 group), 300 and 200 mg/kg (300/200 group), and 0 and 200 mg/kg (0/200 group), respectively. The results showed as follows:1) for the feed processing quality, the effects of ET on the microbial survival rate of the compound probiotics in broiler diets were significantly higher than that of OT (P<0.05). 2) For the growth performance of broilers, under the condition of OT, the addition of chlortetracycline and compound probiotics had no significantly different effects on the growth performance of broilers (P>0.05); and under the condition of ET, in early period, the final weight and average daily gain of broilers in 0/0 group were significantly higher than those in 300/200 group and 0/200 group (P<0.05). Regardless of the addition of chlortetracycline and compound probiotics, the growth performance of broilers in OT group was significantly higher than that in ET group (P<0.05). 3) For the immune function of broilers, there were no significant differences in the immune organ indices and intestine microorganism counts of broilers among groups (P>0.05). 4) For the plasma biochemical indices of broilers, under the same condition of feed processing technology, the addition of chlortetracycline and compound probiotics had no significantly different effects on plasma biochemical indices (P>0.05); regardless of the addition of chlortetracycline and compound probiotics, the two kinds of processing technologies had no significantly different effects on plasma biochemical indices (P>0.05). In conclusion, compared with OT, ET can significantly improve the survival rates of Bacillus subtilis, Bacillus licheniformis and coated lactic acid bacteria, and significantly increase the starch gelatinization of pelleted feed. Compared with OT, ET decreases the growth performance of broilers, the increasing of starch gelatinization has no positive effects on growth performance. Under the same condition of feed processing technology, the effects of the addition of chlortetracycline and compound probiotics on the growth performance, immune organ indices, intestine microorganism counts and plasma biochemical indices of broilers are not significantly different.

Key words： compound probiotics; broilers; growth performance; immune function; plasma biochemical indices

Cite this article

GE Chunyu, LI Junguo, DUAN Haitao, YANG Jie, HAN Qing, ZHANG Jiaqi, QIN Yuchang . Effects of Feed Processing Technology and Compound Probiotics on Growth Performance and Immune Function of Broilers[J]. Chinese Journal of Animal Nutrition, 2018 , 30(9) : 3681 -3692 . DOI: 10.3969/j.issn.1006-267x.2018.09.039

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