译 名：
STUDIES ON FEEDING LEVEL SUITBALE FOR COMMERCIAL LEAN-TYPE SWINE ( FIRST REPORT)
摘 要：
The effects of energy and protein levels on daily gain and lean meat per-centage were studied. 64 fattening pige from 10 Hubei white female and 6Landrace male matings were used and divided into 7 groups The trial wasconducted in three stages. Each group was given different energy and pro-tein levels during different stages. Best results were obtained during the first stage (25-45kg liveweight),feeding 3.lMeal/kg DE and 17 per cent CP; during the second stage (45-70kgliveweight), feeding 2.9Mcal/kg DE and 15 per cent CP and during the thirdstage (70-90kg liveweight), feeding 2.7Mcal/kg DE and 13 per cent CP.The daily gain was 609g, lean meat percentage 63.39 percent, consumption offeed per unit gain 3.49kg and the live-weight was up to 90kg at the age of lessthan 200 days. But differences among seven groups in daily gain, feed efficiency and per-centage of lean were not significant.
