Molecular Nutrition

Determination of Dietary Digestible Energy Value by Double Endogenous Indicators Method and Its Forecasting Model for Rabbits

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  • College of Animal Science and Technology, Shandong Agricultural University, Tai'an 271000, China

Received date: 2017-01-22

  Online published: 2017-07-05

Abstract

This experiment was conducted to investigate the determination of dietary digestible energy (DE) value by double endogenous indicator method for rabbits, and to build its forecasting model. Thirty Rex rabbits with similar body weight were randomly divided into 3 groups with 10 replicates in each group and 1 rabbit in each replicate. Rabbits in the 3 groups were fed 1 kind of diets, and the digestion experiment was conducted with total feces collection method, and determined the recovery rate of double endogenous indicators [acid insoluble lignin (ADL) and ADL+acid insoluble ash lignin (AIA)] by the method of polyester fiber bag. Meanwhile, we selected 17 kinds of pellet feeds from different company in Shandong province, made feeding experiments at the respective rabbit farms, and measured the dietary DE value by double endogenous indicator method, and to build the forecasting model of dietary DE value for rabbits. The results showed as follows: 1) the average recovery rates of 3 dietary ADL and ADL+AIA were 99.87% and 96.81%, respectively. Both of them can be used as the ideal endogenous indicator. 2) Using double endogenous indicators method could accurately determine the various nutrient digestibility and DE value of rabbit diets. 3) Dietary DE value could accurately predict by dietary digestible organic matter (DOM) content using the model: DE (MJ/kg)=0.020 4DOM (g/kg) or DE (MJ/kg)=0.939 5+0.018 2DOM (g/kg). 4) Using dietary nutrient [crude protein (CP), ether extract (EE), neutral detergent soluble carbohydrates (NDSC), hemicellulose (HCEL) and cellulose (CEL)] contents to build the forecasting model was DE (MJ/kg)=0.016 6CP(g/kg)+0.033 4EE(g/kg)+0.015 3NDSC(g/kg)+0.005 4HCEL(g/kg)+0.003 1CEL(g/kg). In conclusion, using double endogenous indicators method can accurately determine the dietary DE value of rabbits.

Cite this article

LIU Lei, LI Fuchang, ZHANG Chongyu . Determination of Dietary Digestible Energy Value by Double Endogenous Indicators Method and Its Forecasting Model for Rabbits[J]. Chinese Journal of Animal Nutrition, 2017 , 29(7) : 2348 -2356 . DOI: 10.3969/j.issn.1006-267x.2017.07.017

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