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首页> 外文期刊>The Journal of Applied Poultry Research >Effects of a new recombinant phytase on performance and mineral utilization of laying ducks fed phosphorus-deficient diets.
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Effects of a new recombinant phytase on performance and mineral utilization of laying ducks fed phosphorus-deficient diets.

机译：一种新的重组植酸酶对饲喂缺磷日粮的蛋鸭生产性能和矿物质利用的影响。

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摘要

An experiment was conducted to evaluate the effects of a new phytase supplementation in Jinding laying ducks fed different concentrations of non-phytate P (NPP) on production performance, mineral retention, and bone and plasma minerals. A 14-wk experiment was conducted using 200-d-old female laying ducks. A total of 1,000 laying ducks were randomly allocated to 5 treatments and fed 5 diets: a control diet that contained an adequate concentration of NPP (0.45%) and 4 diets that were deficient in NPP (0.38, 0.32, 0.25, and 0.18%, respectively) but supplemented with phytase at 500 U/kg. Decreasing the NPP content from 0.45 to 0.18% in the diets with phytase supplementation had no detrimental effects on performance. However, Cu and Zn retention was significantly lower (P<0.05) for laying ducks consuming the 0.18% NPP diet with phytase supplementation. Likewise, laying ducks fed the 0.18% NPP diet had a significant reduction in bone ash, Ca, P, and Cu contents, and in serum P and Cu (P<0.05). Furthermore, the decrease in NPP content in the diet with phytase supplementation significantly increased (P<0.05) P retention. Therefore, with the supplementation of this novel phytase at 500 U, it is possible to reduce dietary concentrations of NPP to 0.25% and maintain the normal performance of laying ducks.
机译：进行了一项实验，以评估在饲喂不同浓度的非植酸磷（NPP）的金定产蛋鸭中添加新型植酸酶对生产性能，矿物质mineral留以及骨骼和血浆矿物质的影响。使用200天大的雌性产蛋鸭进行了14周的实验。总共将1,000只产蛋鸭随机分配给5种处理方式，并饲喂5种日粮：对照日粮中含有适当浓度的NPP（0.45％）和4种日粮中NPP不足（0.38、0.32、0.25和0.18％，分别添加500 U / kg的植酸酶。添加植酸酶的日粮中的NPP含量从0.45降低到0.18％对生产性能没有不利影响。然而，食用0.18％NPP日粮添加植酸酶的蛋鸭的Cu和Zn保留率显着降低（ P <0.05）。同样，饲喂0.18％NPP日粮的蛋鸭的骨灰，Ca，P和Cu含量以及血清P和Cu显着降低（ P <0.05）。此外，添加植酸酶的日粮中NPP含量的降低显着增加（ P <0.05）的P保持力。因此，通过在500 U处添加这种新型植酸酶，可以将日粮中的NPP浓度降低至0.25％，并保持蛋鸭的正常生长。

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