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Digestibility of energy and detergent fiber and digestible and metabolizable energy values in canola meal, 00-rapeseed meal, and 00-rapeseed expellers fed to growing pigs


Digestibility of energy and detergent fiber and digestible and metabolizable energy values in canola meal, 00-rapeseed meal, and 00-rapeseed expellers fed to growing pigs



Journal of Animal Science 93(2): 652-660



ISSN/ISBN: 0021-8812

PMID: 26020750

DOI: 10.2527/jas.2014-7792

There are limited data on the DE and ME values and the digestibility of fiber in canola meal, rapeseed meal, and rapeseed expellers fed to pigs. This experiment was conducted to measure the apparent total tract digestibility (ATTD) of energy, ADF, and NDF and to calculate DE and ME values in canola meal, 00-rapeseed meal, and 00-rapeseed expellers fed to growing pigs. Twenty-three barrows (initial BW: 27.7 ± 2.92 kg) were allotted to an 8 × 23 Youden square design with 8 periods and 23 animals. Twenty-three diets were prepared: a corn basal diet and 22 diets based on corn and 1 of 22 test ingredients. The test ingredients were 6 canola meals from solvent-extraction crushing plants in North America, eleven 00-rapeseed meals from solvent-extraction crushing plants in Europe, and five 00-rapeseed expellers from mechanical-press crushing plants in Europe. Pigs were placed in metabolism cages that allowed for the total, but separate, collection of feces and urine. The DE and ME values were calculated for each source of canola meal, 00-rapeseed meal, and 00-rapeseed expellers using the difference procedure. The ATTD of GE and the DE and ME values in canola meal were not different from the values in 00-rapeseed meal, but 00-rapeseed expellers had greater ( < 0.01) ATTD of GE and DE and ME values than 00-rapeseed meal. Average DE and ME values were 3,378 and 3,127 kcal/kg DM in canola meal, 3,461 and 3,168 kcal/kg DM in 00-rapeseed, and 4,005 and 3,691 kcal/kg DM in 00-rapeseed expellers. The ATTD of ADF was 12.3% greater ( < 0.01) in 00-rapeseed meal than in canola meal, but no differences were observed in ATTD of NDF between canola meal and 00-rapeseed meal. No differences were observed in ATTD of ADF and NDF between 00-rapeseed meal and 00-rapeseed expellers. The models for predicting the DE and ME values of canola and rapeseed products were DE = -1,583 + 6.64 × ash + 7.01 × ADF - 33.17 × NDF + 98.66 × ADL + 1.07 × GE ( = 0.94) and ME = -630.8 + 14.13 × ash + 5.02 × crude fiber + 3.45 × ADF + 1.03 × DE ( = 0.98). In conclusion, the digestibility of energy and NDF and the DE and ME values are not different between canola meal and 00-rapeseed meal. However, 00-rapeseed expellers have greater energy digestibility and contain 7.6% more DE and 7.7% more ME than 00-rapeseed meal.

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