Estimating the apparent digestibility at different ages in rabbits by using faecal enzyme activities and/or in vitro digestibility on diets as predictors

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Published: Jul 8, 2019
Keywords:
Crude enzyme extract Digestibility Enzyme activities Faeces In vitro digestibility

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Attawit Kovitvadhi
Department of Physiology, Faculty of Veterinary Medicine, Kasetsart University, Bangkok, Thailand 10900
Pipatpong Chundang
Department of Physiology, Faculty of Veterinary Medicine, Kasetsart University, Bangkok 10900, Thailand
Karun Thongprajukaew
Department of Applied Science, Faculty of Science, Prince of Songkla University, Songkhla 90110, Thailand
Chanin Tirawattanawanich
Innovation Cluster 2, Thailand Science Park, Ministry of Science and Technology, Pathum Thani 12120, Thailand

Abstract

The determination of apparent digestibility by invasive techniques such as prediction equation is an efficient technique for appraising the gut performance and health status in rabbits. Therefore, faecal enzyme activities and/or in vitro digestibility by using crude enzyme extract from individual rabbits at 92-days-old (CEi), pooled CEi (CEp), or commercial enzyme (CM) as independent variables was investigated, in order to estimate apparent digestibility in rabbits at different ages. Apparent digestibility and faecal samples for enzyme activities at different age of twelve New Zealand white rabbits was calculated and collected. CEi from different digestive organs were taken from slaughtered 92-day-old rabbits. Based on multiple linear regression models, the percentage of in vitro digestibility on dry matter (DM) and organic matter (OM) with CEi fit well relative to using CM to estimate apparent digestibility on DM (DMd; R2= 0.49 vs 0.17, respectively) and OM (OMD; R2= 0.51 vs 0.49, respectively). A low determination coefficient for predicting DMd and OMd was found when using faecal enzyme activity with or without in vitro digestibility data. However, the use of CEp as independent variables provided a higher determination coefficient than using CM. Moreover, the equation which was run for in vitro digestibility on OM using CEp, faecal protease and cellulase activities, was statistically significant in terms of predicting apparent digestibility on crude protein (R2 = 0.72, SEE = 7.05, P = 0.03). Therefore, these parameters can be used as independent variables to estimate apparent digestibility to individual rabbit to reveal current digestive efficiency.

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How to Cite
Kovitvadhi, A., Chundang, P., Thongprajukaew, K., & Tirawattanawanich, C. (2019). Estimating the apparent digestibility at different ages in rabbits by using faecal enzyme activities and/or in vitro digestibility on diets as predictors. Veterinary Integrative Sciences, 17(2), 141–159. Retrieved from https://he02.tci-thaijo.org/index.php/vis/article/view/153499
Issue
Vol. 17 No. 2 (2019): May-August
Section
Research Articles
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