Hy-Line W-36 and Hy-Line W-98 laying hens respond similarly to dietary phosphorus levels

摘要: Two experiments were conducted to determine if 2 laying hen strains, Hy-Line W-36 and W-98, would respond similarly being fed corn-soybean meal diets (17% CP 3.8% Ca) deficient in nonphytate P (NPP). In experiment 1, 3 with varying NPP levels (0.10, 0.14, 0.45%) 6 replicate groups of 12 hens each strain from 20 50 wk age. Body weight, egg mass, feed intake, intake higher for W-98 compared throughout the 30-wk period. The 0.10% dietary treatment was terminated both strains at 35 age due similar low production. Within strain, there no significant difference production performance 0.14% 0.45% NPP. 2,3 0.13, 5 95 112 rapidly severely depressed 99 strains. addition, mass 0.13% conclusion, this research indicates that responded deficiency, suggesting have requirements.