The experiment was conducted to estimate digestible energy (DE) and digestibility coefficient of energy (DCE) in order to establish prediction equations for DE and DCE of wheat bran based on the chemical composition. Twelve growing crossbred barrows were used in two 6?6 Latin square designs (six periods, eleven diets). The DE and DCE of 10 wheat brans in different wheat product areas and batches were determined by total feces collection method. The optimum prediction factor was selected to establish prediction for DE and DCE based on correlation relationship between DE or DCE and chemical composition including crude protein (CP), crude fiber (CF), acid detergent fiber (ADF), neutral detergent fiber (NDF), starch (St), ether extract (EE), ash and gross energy (GE). The results showed that the average DE of 10 wheat brans was 11.72 MJ/kg for dry matter (DM) and a mean value of 61.31% for DCE. St was the best prediction factor for predicting DE and DCE. The recommended prediction equations for DE were DE=0.31?St+3.71 (R2=0.76, RSD=0.42, P<0.01) and DE=-0.91?CF-0.71?CP+33.80 (R2=0.76, RSD=0.35, P<0.01). The recommended prediction equations for DCE were DCE=1.70?St+22.28 (R2=0.76, RSD=2.89, P<0.01) and DCE=-5.02?CF-3.65?CP+182.81 (R2=0.80, RSD=1.79, P<0.01). In conclusion, the prediction equations for DE and DCE of wheat bran based on nutrients composition have relatively higher correlation indices, and the DE values predicted using the results of this study are relatively more accurate than those predicted using the other studies.
ZHANG Zhihu
,
TANG Shouwen
,
WANG Siyu
,
MA Yongxi
. Prediction Equations for Digestible Energy and Digestibility Coefficient of Energy of Wheat Bran for Pigs[J]. Chinese Journal of Animal Nutrition, 2012
, 24(10)
: 1903
-1911
.
DOI: 10.3969/j.issn.1006-267x.2012.10.009
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