Effect of Raw Material for Distillers Grains Production on Protein Quality for Ruminants
摘要
The present experiment was focused on quality of dry distillers' grains with solubles (DDGS) produced from corn (DDGSc), wheat (DDGSw), triticale (DDGSt), and wet distillers grains from corn (WDGc) for ruminants. The products were tested for dry matter (DM), crude protein (CP), neutral detergent fibre (NDF), acid detergent fibre (ADF) acid detergent insoluble nitrogen (NIAD), amino acid (AA) profile, CP degradability and intestinal digestibility (ID) of rumen undegraded protein (RUP). The average content of CP (g/kg DM) ranged from 289.9 (DDGSc) to 356.9 (DDGSw). The highest content of essential AA was in WDGc (440.1 g/160g N) followed with DDGSc. The most variable was the content of Lys in DDGSw (from 13.69 to 22.79 g/160 g N). The NIAD was found the highest for DDGSw (from 16.8% to 36.2%), effective CP degradability was only 50.2% and ID of RUP 82.2%, total essential AA 81.2%, Lys 77.69% and Met 81.4%. Lys was generally the least digestible AA. The ruminally degradable CP fraction was in the range from 52.6% to 70.2% for DDGSc. ID of total and essential by-pass AA was very high 96.2% and 96.1%, Lysine 90.9% and Methionine 96.7%. From these data it can be concluded that DDGS from grains are a good source of protein for ruminants.