0-2周龄肉用仔鸡钙、锰、锌、维生素D_3需要的研究

Study on the Calcium, Phosphorus, Manganese, Zinc and Vitamin D 3 Requirments of Broiler Chickens Aged from 0 to 2 Weeks

选用４３２羽１日龄ＡＡ肉用公雏，随机分成３６组，每组１２羽，采用五因素部分实施的二次回归几乎正交旋转组合设计估测０－２周龄肉用仔鸡钙、磷、锰、锌及维生素Ｄ３的适宜需要量，并建立估测其生产性能的回归方程。结果表明：日粮中适宜的钙、磷（非植酸磷）浓度为：１．００％，０．５０％，钙磷的适宜比例为：１．８－２．２，锰、锌、维生素Ｄ３的浓度分别为：８０－８９ｐｐｍ、１０６－１２５ｐｐｍ、１５１５－１２５０ＩＵ／Ｋｇ。

one-day-old Abro Acres broilers were randomly allocated to 36 groups of 12 replicates according to the second-order regression, nearly orthogonal rotatable composite factorial design. The purpose of the experiment is to determine the optimal requirment of calcium , phosphorus ,manganese , zinc, vitamin D 3 for broiler chickens aged from 0 to 2 weeks ,and to determine the regression model estimating broiler chickens performance .The results are as following : the optimal dietary levels of calcium and phosphorus (available phosphorus )are 1.00%and 0.50%, respectively; the optimal ratio of calcium to phosphorus is 1.8to 2.2 ;the optimal dietary levels of manganese ,zinc , vitamin D 3 are 80 to 89ppm, 106 to 125ppm ,1515 to 1250IU/kg , respectively.