Effects of 3 Proteases on Growth Performance, Nutrient Apparent Digestibility and Serum Biochemical Indices of Suhuai Weaned Piglets

HOU Yuhuang, DING Hongbiao, LI Qiang

doi:10.3969/j.issn.1006-267x.2018.05.047

2018 , Vol. 30 >Issue 5: 2014 - 2020

DOI: https://doi.org/10.3969/j.issn.1006-267x.2018.05.047

Molecular Nutrition

Effects of 3 Proteases on Growth Performance, Nutrient Apparent Digestibility and Serum Biochemical Indices of Suhuai Weaned Piglets

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1. Feed Research Institute, Chinese Academy of Agricultural Sciences, Beijing 100081, China;
2. National Engineering Research Center of Biological Feed, Beijing 100081, China;
3. New Suhuai Pig Resource Development Center, Huaian 223000, China

Received date: 2017-10-10

Online published: 2018-05-06

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Abstract

This experiment was conducted to explore the effects of 3 proteases on growth performance, nutrient apparent digestibility and serum biochemical indices of Suhuai weaned piglets. Single factor randomized block design was used in this experiment, and a total of 120 healthy Suhuai weaned piglets with an average body weight of (9.24±0.84) kg were allocated into 4 groups with 6 replications each and 5 pigs in each replication according to similar weight and gender. Pigs in the control (CT) group were fed a basal diet, and in the experimental groups were fed the basal diets supplemented with 0.2 g/kg acid protease (group Ⅰ), 0.2 g/kg neutral protease (group Ⅱ) and 0.1 g/kg alkaline protease (group Ⅲ), respectively. The trial lasted for 45 d after 5 d adaptation. The results showed as follows:1) compared with the CT group, the final weight, average daily gain (ADG) and average daily feed intake were significantly increased (P<0.05), and the ratio of feed to gain (F/G) was decreased (P>0.05) in group Ⅰ. Compared with the CT group, the ADG was significantly increased (P<0.05) while the F/G was significantly decreased (P<0.05) in group Ⅲ. 2) On day 31 to 45 of the experiment, compared with the CT group, the diarrhea rate and the fecal index in proteases treated groups were significantly decreased (P<0.05), but there were no significant differences among experimental groups (P>0.05). The diarrhea rate and the fecal index in group Ⅲ were the lowest. 3) The dry matter (DM) apparent digestibility and organic matter (OM) apparent digestibility in the proteases treated groups were significantly higher than those in the CT group (P<0.05). The DM apparent digestibility and OM apparent digestibility in group Ⅰ and group Ⅲ were significantly higher than those in group Ⅱ (P<0.05). The crude protein apparent digestibility in group Ⅰ was significantly higher than that in the CT group, group Ⅱ and group Ⅲ (P<0.05). 4) Compared with the CT group, the serum urea nitrogen content in group Ⅰ was significantly decreased (P<0.05), while there were no significant differences among experimental groups (P>0.05). The results indicate that acid protease has a better effect in improving the growth performance and nutrient apparent digestibility of Suhuai weaned piglets, while neutral protease and alkaline protease are better in reducing nutritional diarrhea.

Key words： protease; weaned piglets; growth performance; nutrient apparent digestibility; serum biochemical indices

Cite this article

HOU Yuhuang, DING Hongbiao, LI Qiang . Effects of 3 Proteases on Growth Performance, Nutrient Apparent Digestibility and Serum Biochemical Indices of Suhuai Weaned Piglets[J]. Chinese Journal of Animal Nutrition, 2018 , 30(5) : 2014 -2020 . DOI: 10.3969/j.issn.1006-267x.2018.05.047

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