Protein and energy digestibility in diets for piglets, supplemented with three different kinds of dried whey

Abstract

TO MEASURE THE EFFECT OF KIND OF DRIED WHEY ON NUTRIENT DIGESTIBILITY, ADDED TO STARTED DIETS, TWELVE PIGLETS WEANED AT 17.7 DAYS OF AGE AND WEIGHING 6.8 KG WERE USED. PIGLETS WERE FITTED WITH A SIMPLE T CANNULA AT TERMINAL ILEUM. THREE DIETS WERE TESTED, ONE SUPPLEMENTED WITH NEUTRALIZED DRIED WHEY (NDW), ANOTHER WITH ACID DRIED WHEY (ADW) AND THE THIRD WITH SWEET DRIED WHEY (SDW). APPARENT ILEAL AND TOTAL DIGESTIBILITY OF DRY MATTER (DM), CRUDE PROTEIN (CP) AND ENERGY (EN) WERE MEASURED IN THREE PERIODS (PE): PE1= DAYS 27-29; PE2= DAYS 34-36 AND PE3= DAYS 41-43. THERE WERE NO DIFFERENCES (P > 0.05) AMONG TREATMENTS IN DM ILEAL DIGESTIBILITY (69.9% VS 71.9% VS 68.8% FOR NDW, ADW AND SDW), CP ILEAL DIGESTIBILITY (71.2% VS 71% VS 68.3% FOR NDW, ADW AND SDW) AND EN (67.9% VS 69.2% VS 67.3% FOR NDW, ADW AND SDW). THERE WAS NO PERIOD EFFECT ON NUTRIENTS ILEAL DIGESTIBILITY. DRY MATTER TOTAL DIGESTIBILITY WAS HIGHER (P < 0.05) IN PIGLETS FED WITH ACID DRIED WHEY (83.2% VS 81.4% VS 81% FOR ADW, NDW AND SDW). THERE WERE NO DIFFERENCES (P > 0.05) AMONG TREATMENTS FOR TOTAL DIGESTIBILITY OF CRUDE PROTEIN (78.7% VS 79.5% VS 77.6% FOR NDW, ADW AND SDW) AND ENERGY (81.4% VS 82.6% VS 80.5% FOR NDW, ADW AND SDW), BUT THEY SHOWED A TENDENCY (P < 0.10) TO INCREASED FROM THE FIRST TO THE SECOND PERIOD. IN CONCLUSION, THE DIFFERENT KINDS OF DRY WHEY DID NOT AFFECT NUTRIENT ILEAL DIGESTIBILITY, AND THEY WERE WELL DEGRADED AND ABSORBED IN UPPER GASTROINTESTINAL TRACT (GIT). THE SUPPLEMENTATION OF ACID DRY WHEY IN STARTER DIETS PROMOTED A BETTER UTILIZATION OF DRY MATTER IN TOTAL GIT.