Swine Nutrition

Correlation Study between Digestive Enzyme Activity of Jejunal Fluid and Nutrient Digestibility of Diets in Growing Pigs

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  • State Key Laboratory of Animal Nutrition, Institute of Animal Sciences, Chinese academy of Agriculture Science, Beijing 100193, China

Received date: 2015-04-14

  Online published: 2015-10-15

Abstract

This experiment was conducted to investigate the relationship between digestive enzyme activity of jejunal fluid and dietary nutrient digestibility in pigs to provide reference for the study of nutrient digestion.Sixteen replicates per group were used in 2 groups, which were fed corn-soybean meal diet and corn-corn dry distillers dried grains with soluble (DDGS)-rice bran diet, respectively.The contents of dry matter (DM), crude protein (CP) and gross energy (GE) in the diets and feces, and digestive enzyme activity of jejunal fluid were determined.The relationship between digestive enzyme activity of jejunal fluid and dietary nutrient digestibility were calculated with simple correlation analysis and canonical correlation analysis.The results showed as follows: 1) the coefficient of variation (CV) of 4 digestive enzymes were over 20 % and CV of digestibility of DM, CP and GE were no more than 1.5 % in pigs fed both diets.2) No significant correlation were observed between the nutrient digestibility of diets and activity of amylase, trypsin or chymotrypsin (|r|≤0.51, P>0.05).Positive correlations were observed between the nutrient digestibility and activity of lipase in corn-soybean meal diet (r≥0.56, P<0.05).However, negative correlations were present between the DM digestibility and activity of lipase in corn-corn DDGS-rice bran diet (r=-0.51, P<0.05).3) No significant canonical correlations were observed between the digestive enzyme activity of jejunal fluid and nutrient digestibility of diets in pigs (P>0.05), so the contribution of lipase activity to the variation of nutrient digestibility was little.In conclusion, there are no stable correlation between the nutrient digestibility of diets and digestive enzyme activity of jejunal fluid in pigs.

Cite this article

WANG Yuming, ZHAO Feng, LIAO Rui, ZHANG Li, ZHANG Hu, ZHANG Hongfu . Correlation Study between Digestive Enzyme Activity of Jejunal Fluid and Nutrient Digestibility of Diets in Growing Pigs[J]. Chinese Journal of Animal Nutrition, 2015 , 27(10) : 3033 -3040 . DOI: 10.3969/j.issn.1006-267x.2015.10.007

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