关键词: 仔猪, 醋酸, 高铜, 磷脂, 生产性能, 消化率

Abstract: Sixty six Yorkshire piglets, weaned at age of 30 days with average weight of 8 78±1.07kg, were studied to investigate the effect of different level of acetic acid, copper and phospholipid supplementation on the performance and digestibilities of gross energy (GE), dry matter (DM), crude protein (CP), eather extract (EE), crude fiber (CF), calsium (Ca) and total phosphorus. Saturate D Superior Regression Object was employed. The results show that acetic acid significantly improves feed intake (FI) and dietary CF digestibility (P<0.01), decreases Ca and TP absorption, without effect on EE. But EE digestion is spurred by acetic acid plus high concentration copper (HC) or phospholipid. Together with phospholipid, acetic acid Ca utilization is stimulated, meanwile, FI is reduced. HC or phospholipid increase EE digestibility (P<0.01). HC plus acetic acid or phospholipid has co effect on piglet's performance. Digestibilities of CF, Ca and TP are improved with Phospholipid addition. The optimum additional levels are:acetic acid 0.5%~2.0%; phospholipid 0.5%~1.0%; copper 125~250mg/kg, if the addition level is changed according to age, before 45 days 225~245mg/kg and 125mg/kg after that age, the efficiency would be better.

Key words: PIGLET, ACETIC ACID, COPPER, PHOSPHOLIPID, PERFORMANCE, NUTRIENT DIGESTIBILITY