Removal of the α-Galactosides of Sucrose from Soybean Meal Using Either Ethanol Extraction or Exogenous α-Galactosidase and Broiler Performance

Abstract

Two studies using broiler chicks and one using adult White Leghorn roosters were conducted to determine the influence of stachyose and raffinose (alpha-galactosides of sucrose) present in soybean meal (SBM) on the nutritional value of the meal. In Experiment 1, the addition of four levels (0, .05, .10, or .20 g/kg) of alpha-galactosidase with and without 1 g/kg of invertase to a corn-SBM diet had no effect on weight gain, feed efficiency, protein digestibility, or the digestible energy value of the feed when fed to broiler chicks. However, both enzymes decreased (P < .001) dietary AMEn. In Experiment 2, ethanol extraction and incubation of SBM with alpha-galactosidase decreased the concentrations of the alpha-galactosides of sucrose in SBM from 6.59 to .81 and 1.43%, respectively. However, when broiler chicks were fed semi-purified diets containing SBM, ethanol-extracted SBM, water-incubated SBM, or water plus alpha-galactosidase-incubated SBM, no improvements in weight gain, feed efficiency, or apparent protein digestibility were observed. There was also no improvement in TMEn when the above meals were precision fed to adult White Leghorn roosters (Experiment 3). These results indicate that the removal of up to approximately 90% of the alpha-galactosides of sucrose has no beneficial effect on the nutritional value of SBM for chickens.

Effects of Emulsifier and Multi-enzyme in Different Energy Densitydiet on Growth Performance, Blood Profiles, and Relative Organ Weight in Broiler Chickens

“…On the other hand, Torki and Chengeni (2007) reported no improvement in broiler performance by adding more than 165 × 10 6 unit/kg β-mannanase into corn-soybean meal based diets. In addition, Irish et al (1995) reported no improvement on performance in broilers by adding 0.20 g/kg α-galactosidase to a corn-soybean meal.…”

Biochemical Characterization of α-Galactosidase-Producing Thermophilic Bacillus coagulans KM-1

“…-galactosidase (Min et al, 2002;Kim and Yoon, 1998;Choi et al, 1998;Kim et al, 2004;Irish et al, 1995) -galactosidase (park., 2011;Kim. et al, 2002;Kum and Yoon., 1998;Choi et al, 1998) .…”

Using Exogenous Enzymes to Increase the Nutritional Value of Soybean Meal in Poultry Diet

“…Ao et al (2009) reported a significant increase of AME n of corn-soybean meal diet by dietary supplementinggalactosidase. However, Irish et al (1995) removed up to 90% oligosaccharides from soybean meal using either ethanol extraction or exogenous -galactosidase. No beneficial effect on the nutritional value of soybean meal was observed when the low oligosaccharide (extracted or enzyme-incubated) soybean meal was fed to broiler chicks.…”