植酸酶对肉鸡胫骨指标和钙磷利用率的影响

Effects of Phytase on Tibia Indicators, Calcium and Phosphorus Utilization in Broilers

通过对胫骨指标的测定和代谢试验,研究了微生物植酸酶在两个不同磷酸氢钙添加水平下对肉仔鸡胫骨指标和钙、磷利用率的影响。试验结果表明,与正常磷酸氢钙添加水平(1.10%)的对照组相比,降低磷酸氢钙用量并添加植酸酶,可以提高24日龄肉仔鸡的胫骨长度,提高24和42日龄肉仔鸡的胫骨重量/体积;0.44%磷酸氢钙水平添加植酸酶组的24日龄肉鸡的脱脂干骨重和粗灰分含量较对照组显著降低(P<0.05);降低磷酸氢钙水平并添加植酸酶不会对肉鸡胫骨的钙、磷含量造成影响(P>0.05);降低磷酸氢钙水平并添加植酸酶能够显著提高磷的消化利用率(P<0.05),极显著提高24日龄肉仔鸡的钙表观消化率(P<0.01),提高42日龄肉仔鸡的钙表观消化率,但差异不显著(P>0.05)。

To study the impacts of microbial phytase added in two different CaHP04 addition levels of the broiler tibia indicators and calcium and phosphorus utilization through determination of tibia indicators and broiler metabolic test. The results showed that, compared with the control group of normal CaHP04 addition level（1.10%）, reduce CaHP04 dosage and phytase supplementation increased the length of the 24-day-old broiler tibia, improved the tib- ia weight / volume ratio of 24-day-old and 42-day-old broilers; nonfat dry bone weight and crude ash content of 24-day-old broilers at the CaHP04 level of 0.44% phytase group were lower than the control group（P〈0.05）; re- duce CaHPO~ levels and adding phytase had no impact on calcium and phosphorus content of broiler tibia（P〉0.05）; reduce the CaHP04 level and add phytase c ouht significantly improved the digestibility of apparent phosphorus（P〈 0.05）, and a very significant increase in the 24 days broilers＇calcium apparent digestibility（P〈0.01）, and increased in the 42 days broilers calcium apparent digestibility（P〉0.05）.