Grunder A A, Tsang C P
Poult Sci. 1984 May;63(5):1073-5. doi: 10.3382/ps.0631073.
Supplemental vitamin D3 (D3) was removed from the diet given to an experimental group of White Leghorn hens, at 227 days of age, while a control group continued to receive a supplemental diet. By 14 days after D3 withdrawal, egg weight, egg specific gravity, shell weight, percent shell, shell thickness, and plasma calcium were lower (P less than .05) in the experimental compared to the control group. At 30 to 37 days after D3 withdrawal, experimental hens had less (P less than .05) jejunal adenosine triphosphatase (ATPase) activity than the control hens. The study indicated that lack of D3 supplementation in laying diets reduced jejunal ATPase activity as well as egg shell quality.
在227日龄时，从一组白来航蛋鸡的日粮中去除补充维生素D3（D3），而对照组继续接受补充日粮。在停用D3 14天后，与对照组相比，实验组的蛋重、蛋比重、蛋壳重量、蛋壳百分比、蛋壳厚度和血浆钙含量较低（P<0.05）。在停用D3 30至37天后，实验母鸡空肠腺苷三磷酸酶（ATPase）活性低于对照母鸡（P<0.05）。该研究表明，产蛋日粮中缺乏D3补充会降低空肠ATPase活性以及蛋壳质量。
