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来源：百度知道 编辑：UC知道 时间：2024/06/20 13:42:49
The effects of a reduced dietary nonphytate phosphorus (NPP) level and inclusion of phytase on broiler breeder performance and P concentrations in the litter and manure were investigated. Ross 308 broiler breeder pullets and Ross 344 cockerels were placed sex-separate in a blackout growing house and fed standard starter and grower diets to 9 wk of age. At 10 wk of age, 4 treatments (A, B, C, D) were assigned to each of 4 floor pens of 68 pullets and 1 pen of 50 cockerels. From 10 to 21 wk, treatments A to D contained 0.37, 0.27, 0.27, and 0.17% NPP, respectively, with 300 phytase units (FTU)/kg of phytase added to treatments B and D。 A laying diet was fed from 22 to 64 wk and NPP levels of treatments A to D were adjusted to 0.37, 0.27, 0.19, and 0.09%, respectively, and phytase addition to treatments B and D was increased to 500 FTU/kg. Analysis of the litter from growing pens showed no effect on litter total P when phytase replaced 0.1% of NPP. However, decreasing the dietary NPP by 0

的影响，减少了膳食nonphytate磷（核电厂）的水平，并列入植酸酶对肉种鸡的性能和P浓度在垃圾和粪便进行了调查。罗斯308肉种鸡 pullets和罗斯344鸡放在性别分开，在停电日益增长的内务和美联储标准精简和种植者日粮至9周的年龄。在10周岁，四治疗（甲，乙，丙，丁）被分配给每个4楼笔68 pullets和1笔50鸡。从10日至21周，治疗A至D所载的0.37 ， 0.27 ， 0.27 ， 0.17 ％，核电厂，分别与300植酸酶单位（工联会） /公斤植酸酶的补充治疗B和D 。铺设的饮食是美联储22日至64周和核电厂的水平，治疗A至D分别调整至0.37 ， 0.27 ， 0.19 ， 0.09 ％，分别和植酸酶除了治疗B和D是增加至500工联会/公斤。分析垃圾从日益增长的笔表明，没有影响垃圾全磷时，植酸酶取代0.1 ％的核电厂。不过，降低饮食核电站由0.1 ％ ，无植酸酶减少垃圾全磷由18 ％ 。水可溶性P （太阳能）和无锡西姆莱斯：全磷比值下降时，种植者膳食核电站的水平减少到0.17 ％，与补充植酸酶和相关的垃圾含水率水平，在日益增长的笔。在产蛋期，减少了在核电厂从0.37至0.09 ％，与补充植酸酶减少双方肥全磷和无锡西姆莱斯42 ％。母鸡一天产蛋量最高，对最低核电厂的饮食与植酸酶，但生育率下降时，膳食核电站是减少到低于0.37 ％。结果表明，植酸酶列入在一个肉种鸡奠定饮食不惜牺牲所有补充磷磷酸氢钙减少了肥料的总P和无锡西姆莱斯浓度由42 ％，与没有影响的人数只鸡苗生产的每母鸡住。