The effects of different dietary crude protein level on faecal crude protein and amino acid flow and digestibility in growing pigs

Diets containing different crude protein levels (16%, 14%, and 12%) were created to feed Bamei pigs in order to study the effect of these compositions on intestinal colonies. Therefore, 27 healthy Bamei pigs of similar weight ( 20.99 kg ± 0.16 kg ) were selected and randomly divided into three groups for microbial diversity analysis. The results of this study show that microbial diversities and abundances in Bamei pig jejunum and caecum samples after feeding with different dietary protein levels were significantly different. Dietary crude protein level exerted no significant effect on the Shannon index for cecum microbes in these pigs, while Simpson, ACE, and Chao1 indices for group I were all significantly higher than those of either the control group or group II ( P < 0.05 ). Indeed, data show that microbial diversities and abundances in the 14% protein level group were higher than those in either the 16% or 12% groups. Dominant bacteria present in jejunum and cecum samples given low-protein diets were members of the phyla Firmicutes and Bacteroidetes. Data show that as dietary crude protein level decreases, representatives of the microbial flora genus Lactobacillus in jejunum and cecum samples gradually increases. Values for the KEGG functional prediction of microbial flora at different dietary protein levels also show that genes of jejunum and cecum microorganisms were mainly enriched in the “metabolism” pathway and indicate that low protein diets increase intestinal metabolic activity. Therefore, we recommend that Bamei pig dietary protein levels are reduced 2% from their existing level of 16% crude protein. We also suggest that essential synthetic amino acids (AA) are added to optimize this ideal protein model as this will increase intestinal flora diversity in these pigs and enhance health. These changes will have a positive effect in promoting the healthy growth of Bamei pigs.

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Effect of dietary crude protein level on jejunal brush border enzyme activities in weaned pigs

Archives of Animal Nutrition ◽

10.1080/17450390903299133 ◽

2009 ◽

Vol 63 (6) ◽

pp. 455-466 ◽

Cited By ~ 11

Author(s):

Florence Omobola Opapeju ◽

Meike Rademacher ◽

Charles Martin Nyachoti

Keyword(s):

Brush Border ◽

Protein Level ◽

Enzyme Activities ◽

Crude Protein ◽

Weaned Pigs ◽

Dietary Crude Protein ◽

Brush Border Enzyme ◽

Crude Protein Level

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Effects of dietary crude protein level on odour from pig manure

animal ◽

10.1017/s1751731107710303 ◽

2007 ◽

Vol 1 (5) ◽

pp. 734-744 ◽

Cited By ~ 22

Author(s):

P.D. Le ◽

A.J.A. Aarnink ◽

A.W. Jongbloed ◽

C.M.C.Vander Peet-Schwering ◽

N.W.M. Ogink ◽

...

Keyword(s):

Protein Level ◽

Crude Protein ◽

Pig Manure ◽

Dietary Crude Protein ◽

Crude Protein Level

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Effects of Dietary Crude Protein Levels on Fecal Crude Protein, Amino Acids Flow Amount, Fecal and Ileal Microbial Amino Acids Composition and Amino Acid Digestibility in Growing Pigs

Animals ◽

10.3390/ani10112092 ◽

2020 ◽

Vol 10 (11) ◽

pp. 2092

Author(s):

Zhenguo Yang ◽

Tianle He ◽

Gifty Ziema Bumbie ◽

Hong Hu ◽

Qingju Chen ◽

...

Keyword(s):

Amino Acids ◽

Amino Acid ◽

Essential Amino Acid ◽

Crude Protein ◽

Growing Pigs ◽

Protein Levels ◽

Low Protein ◽

Dietary Crude Protein ◽

Amino Acids Composition ◽

Protein Amino Acids

The purpose of this experiment was to evaluate the effects of low protein corn-soybean meal-based diets on fecal CP, amino acid (AA) flow amount, AA digestibility and fecal and ileal microbial AA composition in growing pigs. Eighteen pigs (initial body weight = 30 ± 1.35) were randomly divided into three groups and fed with basal diets with CP levels of 12%, 15% and 18%, respectively. The Lys, Met + Cys, Thr and Trp level in the 12% CP and 15% CP groups is the same as 18% CP group by the addition of four crystalline Lys, Met + Cys, Thr and Trp to the diet. The results showed that with the decrease of dietary CP level from 18% to 12%, the fecal total nitrogen (N), CP and total AA (TAA) flow amount decreased linearly (p < 0.05). Dry matter (DM) digestibility, CP digestibility, TAA digestibility, essential amino acid (EAA) digestibility and non-essential amino acid (NEAA) digestibility increased linearly with the decrease of dietary CP concentration from 18% to 12%. Compared with 18% CP group, the flow amount of Asp, Ser, Glu, Gly, Tyr, Val, Leu and Phe in feces of pigs in the 15% CP group and 12% CP group decreased significantly, while the flow amount of Arg in the 15% CP group was lower than that in the 18% CP group and 12% CP group. The fecal microbial N and AA of the 15% CP group were higher than those of the 18% CP and 12% CP groups. Fecal TAA flow amount decreased linearly with the decrease of the dietary CP levels from 18% to 12%. Fecal TAA and NEAA flow amount also decreased linearly with the decrease of dietary CP level from 18% to 12%. Except for Glu, Gly, Met, Tyr, Thr and Phe, there were significant differences among the three groups in the composition of 17 kinds of AAs in fecal microorganisms. Among the 17 AA compositions of ileal microorganisms, except Tyr and Lys, the other AAs were significantly different among the three groups (p < 0.05)

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