Effects of Different Starch Type Diets on Main Microbes and Their Metabolites in Cecal Digesta of Finishing Pigs

YU Miao; LI Zhenming; CHEN Weidong; RONG Ting; WANG Gang; MA Xianyong

doi:10.3969/j.issn.1006-267x.2020.02.017

Chinese Journal of Animal Nutrition >

2020 , Vol. 32 >Issue 2: 613 - 625

DOI: https://doi.org/10.3969/j.issn.1006-267x.2020.02.017

SWINE NUTRITION AND FEED

Effects of Different Starch Type Diets on Main Microbes and Their Metabolites in Cecal Digesta of Finishing Pigs

YU Miao ,
LI Zhenming ,
CHEN Weidong ,
RONG Ting ,
WANG Gang ,
MA Xianyong

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Guangdong Engineering Technology Research Center of Animal Meat Quality and Safety Control and Evaluation, Guangdong Public Laboratory of Animal Breeding and Nutrition, State Key Laboratory of Livestock and Poultry Breeding, Key Laboratory of Animal Nutrition and Feed Science in South China, Ministry of Agriculture, Institute of Animal Science, Guangdong Academy of Agricultural Sciences, Guangzhou 510640, China

Received date: 2019-08-13

Online published: 2020-02-21

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Abstract

This study aimed to investigate the effects of different starch type diets on the main microbes and their metabolites in the cecal digesta of finishing pigs. Seventy-two healthy crossbred (Duroc×Landrace×Large White) barrows with similar initial body weight were randomly allocated to three groups with 8 replicates per group and 3 pigs per replicate. Tapioca starch (TS), corn starch (CS) and pea starch (PS) were used as the only dietary starch sources to formulate diets for pigs in the three groups, and the amylose starch to amylopectin starch ratios were 0.11, 0.25 and 0.44, respectively. The experiment lasted for 42 days after 4 days adaption. At day 42 of the formal trial period, one pig with body weight close to the average from each replicate was randomly selected and slaughtered, and then the cecal digesta was collected for correlated parameters analysis. The results showed as follows:1) compared with the TS diet, PS diet significantly decreased the pH in the cecal digesta of finishing pigs (P<0.05). 2) Compared with the TS diet, CS and PS diets significantly increased the lactate content (P<0.05), and PS diet also significantly increased the contents of acetate, butyrate and total short-chain fatty acid (P<0.05) in the cecal digesta of finishing pigs. 3) For intestinal microbial nitrogen metabolites, compared with the TS diet, CS and PS diets significantly decreased the contents of ammoniacal nitrogen, putrescine, total biogetic amines, indole and skatole (P<0.05), and PS diet also significantly reduced the contents of cadaverine and tryptamine (P<0.05) in the cecal digesta of finishing pigs. 4) For intestinal micorbes, compared with the TS diet, CS and PS diets significantly increased the Prevotella number (P<0.05), while significantly decreased the Escherichia coli number (P<0.05) in the cecal digesta of finishing pigs. Meanwhile, PS diet also significantly increased the numbers of Lactobacillus, Bifidobacterium, Clostridium cluster Ⅳ and Clostridium cluster ⅩⅣ in the cecal digesta of finishing pigs compared with the TS diet (P<0.05). In conclusion, under the conditions of this trail, feeding PS diet with higher amylose starch in finishing pigs can alter the microbial composition and fermentation patterns, such as increases the number of some beneficial microbes and the contents of carbohydrate metabolites in the cecal digesta, while decreases the number of potential pathogenic microbe and the contents of nitrogen metabolites. These findings indicate that starch feeding with higher amylose starch may offer potential benefits for gut health of host.

Key words： starch types; finishing pigs; cecum; microbes; metabolites

Cite this article

YU Miao , LI Zhenming , CHEN Weidong , RONG Ting , WANG Gang , MA Xianyong . Effects of Different Starch Type Diets on Main Microbes and Their Metabolites in Cecal Digesta of Finishing Pigs[J]. Chinese Journal of Animal Nutrition, 2020 , 32(2) : 613 -625 . DOI: 10.3969/j.issn.1006-267x.2020.02.017

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