【作者】 李蕴玉； 冯敏山； 李素芬； 李佩国；

【Author】 Li Yunyu Feng Minshan Li Sufen Li Peiguo (Hebei Normal Uinversity of Science & Technology,Qinhuangdao Hebei ,066600)

【机构】 河北科技师范学院；

【摘要】 对蛋用鸡连续饲喂低蛋白低有效磷饲粮的安全性及添加植酸酶的效果进行了探讨。结果表明,蛋用鸡在2-8、9-15、16-18和19-36周龄饲喂低蛋白(17.0%-13.5%-13.0%-15.0%)、中有效磷(0.35%-0.3%-0.3%-0.3%)饲粮,除蛋重降低外,其它生产性能指标与高蛋白(19.0%-15.0%-14.5%-16.5%)、高有效磷(0.45%-0.4%-0.4%-0.4%)饲粮无显著差异,而氮、磷排泄量分别减少了9.50%-18.81%和15.93%-19.21%。饲喂低蛋白、低有效磷(0.25%-0.2%-0.2%-0.2%)饲粮,添加300IU/Kg植酸酶后可达到高蛋白高磷的饲养效果,并使总磷和粗蛋白的表观利用率分别提高了7.24%-12.50%和4.67%-15.70%,氮、磷排泄分别减少了17.70%-25.19%和36.71%-43.17%。更多还原

【Abstract】 Safety of laying type chickens continuously fed low protein and low available phosphorous (AP) and efficiency of phytase supplementation were studied. The results showed that except egg weight, other performances of laying type chickens fed low protein (17.0%-13.5%-13.0%-15.0%)and middle AP (0.35%-0.3%-0.3%-0.3%)diet in 2-8,9-15,16-18 and 19-36 weeks had no significant difference from those fed high protein (19.0%-15.0%-14.5%-16.5%) and high AP diet, respectively , but N, P excretion decreased by 9.50%-18.81% and 15.93%-19.21%,respectively . Efficiency of laying type chickens fed low protein and low AP (0.25%-0.2%-0.2%-0.2%)adding 300 IU/Kg phytase diet was same as those fed high protein and high AP diet ,the apparent utilization rate of total P and crude protein increased by 7.24%-12.50% and 4.67%-15.70%, but N, P excretion decreased by 17.70%-25.19% and 36.71%-43.17% respectively .更多还原