蛋壳粉少量替代石粉对蛋鸭产蛋性能、蛋品质及钙代谢的影响

Effects of a Small Amount of Eggshell Powder Instead of Stone Powder on Laying Performance,Egg Quality and Calcium Metabolism in Laying Ducks

【目的】研究蛋壳粉少量替代石粉对蛋鸭产蛋性能、蛋品质和钙代谢的影响。【方法】试验选择80只180日龄的健康山麻鸭蛋鸭,随机分为两组,每组5个重复,每个重复8只蛋鸭。对照组饲喂基础饲粮,试验组在基础饲粮基础上,用2 g蛋壳粉取代饲料中等量的钙添加量。试验为期56 d,试验期间检测蛋鸭产蛋性能、蛋品质、钙沉积量、血液中钙磷含量和钙代谢相关激素水平等指标。【结果】试验组平均蛋重、蛋壳强度和蛋白高度均显著高于对照组,表明添加蛋壳粉能明显提高蛋品质量。试验组蛋壳钙沉积量、血磷含量和血浆甲状旁腺素水平显著高于对照组,试验组血钙含量为4.74(±1.17)μmol/mL,极显著高于对照组的2.79(±1.00)μmol/mL,表明蛋壳粉更有利于钙沉积,能明显提高血液中钙磷含量和甲状旁腺素水平。【结论】蛋壳粉少量替代石粉可促进蛋鸭钙吸收代谢和蛋壳钙沉积,提高平均蛋重,改善蛋品质。

【Objective】This study was conducted to determine the effects of a small amount of eggshell powder instead of stone powder on laying performance,egg quality and calcium metabolism of laying ducks.【Method】Eighty healthy 180-day-old ducks were randomly divided into two groups(control group and test group).There were 5 replicates in each group and 8 duck eggs in each replicate.The control group was fed with normal basal diet,and the test group was fed with basal diet among which 2 g calcium was replaced by the same amount of eggshell powder.The test period lasted for 56 days.The laying performance,egg quality,calcium deposition,calcium and phosphorus contents in blood and levels of calcium metabolism-related hormones were measured during the experiment.【Result】The average egg weight,eggshell strength and protein height of the test group were significantly higher than those of the control group,which showed that adding eggshell powder could obviously improve egg quality.The levels of calcium deposition,serum phosphorus and plasma parathyroid hormone(PTH)in the test group were significantly higher than those in the control group.The blood calcium content of the test group 4.74(±1.17)μmol/mL was extremely significant higher than that of the control group 2.79(±1.00)μmol/mL,showing that eggshell powder was not only more conducive to calcium deposition,but also significantly increasing the contents of calcium and phosphorus as well as the levels of parathyroid hormone in blood.【Conclusion】The results indicate that a small amount of eggshell powder replacement can significantly promote calcium metabolism and calcium deposition,increase the average egg weight and improve the egg quality.