Sooncharernying S, Edwards H M
Department of Poultry Science, University of Georgia, Athens 30602.
Poult Sci. 1989 May;68(5):719-23. doi: 10.3382/ps.0680719.
Laying hens were fed diets containing combinations of 2.6 or 3.6% calcium and .45 or .75% total phosphorus. After receiving the diets for 2 wk, blood samples were collected during a 24-h period at 6-h intervals and total calcium, ultrafilterable calcium and dialyzable phosphorus was determined on blood plasma. Plasma total calcium was higher (P less than .05) in hens that received the diets containing the higher level of calcium (3.6%), but was not influenced by dietary phosphorus levels. Overall in the experiment, neither the dietary calcium nor phosphorus levels had significant effects on the plasma ultrafilterable calcium or dialyzable phosphorus. However, at 0600 and 1200 h, dialyzable phosphorus levels in plasma of hens fed the diet high in both calcium and phosphorus was significantly (P less than .05) greater than that in plasma from hens fed diets low in both calcium and phosphorus. The time that the blood sample was taken had a significant effect (P less than .05) on plasma total calcium, ultrafilterable calcium, and dialyzable phosphorus.
给蛋鸡饲喂含钙量为2.6%或3.6%以及总磷含量为0.45%或0.75%的组合日粮。在接受这些日粮2周后，在24小时内每隔6小时采集一次血样，并测定血浆中的总钙、超滤性钙和可透析磷。接受高钙水平（3.6%）日粮的母鸡血浆总钙较高（P<0.05），但不受日粮磷水平的影响。在整个实验中，日粮中的钙和磷水平对血浆超滤性钙或可透析磷均无显著影响。然而，在06:00和12:00时，饲喂高钙高磷日粮的母鸡血浆中可透析磷水平显著（P<0.05）高于饲喂低钙低磷日粮的母鸡血浆中的可透析磷水平。采血时间对血浆总钙、超滤性钙和可透析磷有显著影响（P<0.05）。
