Effects of Feed Processing Technology and Multivitamin Additive Amount on Growth Performance, Blood Indexes and Nutrient Apparent Digestibility of Growing and Finishing Pigs

DUAN Haitao, LI Junguo, QIN Yuchang, LI Jun, YANG Jie, DONG Yingchao

doi:10.3969/j.issn.1006-267x.2019.05.014

2019 , Vol. 31 >Issue 5: 2076 - 2087

DOI: https://doi.org/10.3969/j.issn.1006-267x.2019.05.014

Molecular Nutrition

Effects of Feed Processing Technology and Multivitamin Additive Amount on Growth Performance, Blood Indexes and Nutrient Apparent Digestibility of Growing and Finishing Pigs

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1. Feed Research Institute, Chinese Academy of Agricultural Sciences, Beijing 100081, China;
2. College of Animal and Technology, Henan University of Animal Husbandry and Economy, Zhengzhou 450046, China;
3. Key Laboratory of Feed Biotechnology of Ministry of Agriculture, Beijing 100081, China;
4. Institute of Animal Science, Chinese Academy of Agriculture Sciences, Beijing 100081, China

Received date: 2018-10-09

Online published: 2019-05-15

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Abstract

The aim of this study was to investigate the effects of feed processing technology and multivitamin additive amount on growth performance, blood indexes and nutrient apparent digestibility of growing and finishing pigs. Eighty Duroc×Landrace×Yorkshire three-way cross pigs with the body weight of 30 kg were randomly divided into 4 groups with 5 replicates in each group and 4 pigs in each replicate. The feeding trial lasted for 14 weeks, including a 6-week growing period and a 8-week fattening period. The diet of control group was pelleted by ordinary processing technology, and a normal dose of multivitamins was added to the formula [350 mg/kg in the growing period and 200 mg/kg in the fattening period, as group A for multivitamin additive amount]; the diets of test groups were pelleted by high-efficiency condition and low-temperature pelleted processing technology. The multivitamin additive amount of test group 1 was similar to that of the control group, which was also used as group A for multivitamin additive amount. The multivitamin additive amounts of test groups 2 and 3 were reduced by 20% [280 mg/kg in the growing period and 160 mg/kg in the fattening period, as group B for multivitamin additive amount] and 40% [210 mg/kg in the growing period and 120 mg/kg in the fattening period, as group C for multivitamin additive amount] based on the control group, respectively. The results showed as follows: 1) during the growing period, the pellet hardness and starch gelatinization degree of the high-efficiency condition and low-temperature pelleted processing technology group were significantly higher than those of the ordinary processing technology group (P<0.05), and the final weight and average daily gain (ADG) of the high-efficiency condition and low-temperature pelleted processing technology group were higher than those of the ordinary process group, but the differences were not significant (P>0.05). The apparent digestibility of crude protein and dry matter of the high-efficiency condition and low-temperature pelleted processing technology group was significantly higher than that of the ordinary processing technology group (P<0.05). There were no significant differences in growth performance indexes among groups with different multivitamin additive amounts (P>0.05), but the apparent digestibility of crude protein and dry matter of the group B was significantly higher than that of the groups A and C (P<0.05). 2) During the fattening period, the pellet hardness of the high-efficiency condition and low-temperature pelleted processing technology group was significantly higher than that of the ordinary processing technology group (P<0.05), the final weight of the high-efficiency condition and low-temperature pelleted processing technology group was significantly higher than that of the ordinary processing technology group (P<0.05), the apparent digestibility of crude protein and dry matter of the high-efficiency condition and low-temperature pelleted processing technology group was significantly higher than that of the ordinary processing technology group (P<0.05), and the contents of immunoglobulin A (IgA) and glucose (GLU) and the activities of alanine aminotransferase (ALT) and aspartate aminotransferase (AST) in serum of the high-efficiency condition and low-temperature pelleted processing technology group were significantly higher than those of the ordinary processing technology group (P<0.05). There were no significant differences in growth performance indexes among groups with different multivitamin additive amounts (P>0.05), but the apparent digestibility of dry matter of the group B was significantly higher than that of the groups A and C (P<0.05). Moreover, the serum immunoglobulin M (IgM) content of the group B was significantly higher than that of the group C (P<0.05), and the serum ALT and AST activities of the group A were significantly higher than those of the groups B and C (P<0.05). It can be seen that the diets of growing and fattening pigs adopt high-efficiency condition and low-temperature pelleted processing technology, the pellet feed processing quality and apparent digestibility of nutrients are better than the diets produced by ordinary processing technology, and the decrease of multivitamin additive amount in feed formula has no significant effects on the growth performance of growing and finishing pigs.

Key words： feed processing technology; vitamin; growing and finishing pigs; growth performance

Cite this article

DUAN Haitao, LI Junguo, QIN Yuchang, LI Jun, YANG Jie, DONG Yingchao . Effects of Feed Processing Technology and Multivitamin Additive Amount on Growth Performance, Blood Indexes and Nutrient Apparent Digestibility of Growing and Finishing Pigs[J]. Chinese Journal of Animal Nutrition, 2019 , 31(5) : 2076 -2087 . DOI: 10.3969/j.issn.1006-267x.2019.05.014

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