植酸酶对蛋鸡磷利用率及蛋品品质的影响

Effect of dietary phytase on phosphorus utilization and egg quality of laying hens

选用７２ 周龄豫州褐蛋鸡，以玉米—大豆饼为基础日粮，降低总有效磷水平后，进行添加植酸酶试验－ 该试验设４ 个处理１ 个对照：有效磷水平第１，２ 处理为０－２９％ ，第３，４ 处理为０－２５％ ；植酸酶添加量第１ ，３ 处理为０－０５％ ，第２ ，４ 处理为０－１０％ ；以全价料（ 总有效磷水平０－３３ ％ ，不添加植酸酶） 作对照－ 结果表明，加酶各处理在产蛋率和蛋壳厚度等方面与对照无显著差异，但加酶各处理的单只蛋重、蛋黄总磷含量均高于对照，血清无机磷含量比对照提高了１６－７％ ～２９－３３％ ，且各处理的磷利用率也有所提高，粪磷排放量降低了１１－３０ ％ ～３２－２９ ％－

This experiment was carried out to evaluate the effects of phytase on egg production,nutrient utilization and phosphorus excretion of laying hens fed with low P diet.For this purpese 5 trials were established with 80 laying hens of 72 week old.CK:fed with a diet containing 0.33% available phosphorus (Pa) without phytase as a contrast.Treatment 1:fed with a diet containing 0.29% Pa plus phytase.Treatment 2:fed with a diet containing 0.29 Pa plus 0.10% phytase.Treatment 3:fed with a diet containing 0.25% Pa plus 0.05% phytase.Treatment 4:fed with a diet containing 0.25% Pa plus 0.10% phytase.It is concluded that the egg production and the eggshell thickness in all treatments were similar,but the egg weight and phosphorus content of egg were significantly enhanced.The plasma P of treatment 2～5 were 16.17%～29.33% higher than that of CK.The excretion P of treatment 2～5 were 11.30～ 32.29% lower than that of CK.