在不同有效磷日粮中添加植酸酶对仔猪生产性能的影响

将体重相近的60头15kg左右的杜长大仔猪分为5个处理（对照组、AP降低0．1％、AP降低0．12％、AP降低0．1％＋酶、AP降低0．12％＋酶），每个处理3个重复，每重复4头仔猪。研究结果表明：曰粮有效磷水平和植酸酶对仔猪生长、料重比都有显著的影响（P〈0．05），与对照组相比，当日粮有效磷水平降低0．1％，仔猪体重、日增重会显著降低，而料重比显著上升；当有效磷降低0．1％添加植酸酶时，仔猪体重、日增重会显著增加，而料重比显著下降；当日粮有效磷降低0．12％时，不论加酶与否，其体重、日增重都会显著下降，而料重比会显著增加。

Effect of phytase supplemented in the different available phosphorus diet on growth performance of piglets

The purpose of the experiment was to study the influence of the phytase supplementation on the performance of piglet. Sixty cross-bred(Duroc Landrace Yorkshire) piglets, weighing an average of 15 kg, were randomly assigned to five treatments(controls, AP-0.5%, AP-0.12%, AP-0.1%+phytase, AP-0.12%+phytase), 3 duplicate and four piglets per duplicate. The result showed that the available phosphorus(AP)and phytase had an significant influence on the growth and feed/gain ratio of piglets(P <0.05). Comparing with the control, when the diet AP level decreased 0.1%, the piglets weight and daily gain decreased and feed/gain ratio increased significantly. When the decreased AP 0.1% diet supplement phytase, the piglets weight and daily gain increased and feed/gain ratio decreased significantly. When the diet AP level decreased 0.12%, whether phytase supplementation or not, the piglets weight and daily gain decreased and feed/gain ratio increased significantly.