The NPP requirements of egg cockerels were as follows: 0.51%, 0.50%, 0.50%, 0.50%, 0.45%, 0.42%, based on toe ash, tibia ash, percentage of Ca of tibia ash, percentage of P of kidney, percentage of P of tibia ash and body weight gain, respectively.

• 以不同指标测定的蛋公雏非植酸磷需要量由大到小依次为:趾骨灰(0.；51%25)>胫骨灰分、胫骨钙、肾脏磷(0