| Popis: |
Alternative ingredients and co-products from the ethanol and biofuel industries represent an opportunity for utilization in swine diets. In this context, understanding nutritional value to practical swine feeding begins with product characterization and determination of nutrient digestibility. The objective of this study was to determine metabolizable energy (ME) of Yeast-based high protein DDGS (HP-GDDY) fed to growing pigs in comparison with common feed ingredients in swine diets. A total of 28 barrows were adapted to individual metabolic crates and fed with 7 diets, a corn-based basal diet and 6 corn–based diets containing spray dried HP-GDDY, ring dried HP-GDDY, conventional DDGS, soybean meal (SBM), enzymatically-treated soybean meal (HP300), and fish meal (FM). Pigs were fed at 4% of BW and assigned to a crossover design with 2 collection periods, which provided 8 observations for each treatment. Fecal and urine samples were collected for 5 d after 7 d of adaptation to determine gross energy content and calculate ME (Table 1). Energy digestibility in spray GDDY and ring GDDY diets was greater than conventional DDGS diet and similar to SBM, HP300, and FM diets. The ME content in ring GDDY (3,926.7 Kcal/Kg) was similar to spray GDDY (4,480.5 Kcal/Kg). The ME in SBM (3824.5 Kcal/Kg), HP300 (3,883.8 Kcal/Kg), and FM (3,823 Kcal/Kg) was similar to spray and ring GDDY. Energy values for spray (4480.48 Kcal/Kg) and ring (3926.70 Kcal/Kg) GDDY are higher when compared with previous reported values for HP DDGS (3732 Kcal/Kg, NRC, 2012). Data from this study support that HP-GDDY products have comparable or greater energy value to commonly used ingredients in swine diets and that drying method had minor influence on energy digestibility. These novel feed ingredients can be used in practical pig diet formulation. |
