Effects of the reproductive cycle and age on calcium and phosphorus metabolism and bone integrity of sows.
Effects of the reproductive cycle and age on calcium and phosphorus metabolism and bone integrity of sows.
复制标题
繁殖周期和年龄对母猪钙磷代谢和骨完整性的影响。
DOI：
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发表时间：
1998
影响因子：
3.3
通讯作者：
M. Akhter
中科院分区：
文献类型：
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作者：
M. Giesemann;A. Lewis;P. S. Miller;M. Akhter
本研究旨在探讨繁殖周期阶段和日龄对母猪钙磷代谢和骨完整性的影响。对第一胎和第五胎经产母猪进行了为期5天的平衡研究，并在妊娠最后三个月、哺乳期结束或随后妊娠的最后三个月屠宰母猪。在第一次妊娠（n = 11）、第一次哺乳（n = 10）或第二次妊娠（n = 10）期间对第一次经产母猪进行研究。在第5次妊娠（n = 10）、第5次哺乳（n = 9）或第6次妊娠（n = 9）期间检查第5次经产母猪。所有母猪在妊娠期间饲喂1.9 kg/d的普通饮食（0.76% Ca和0.63% P），并允许在哺乳期间随意获得相同的饮食。钙和磷的消化率在哺乳期比在妊娠期大得多。在妊娠期间，年轻的母猪吸收和保留更多的钙和磷比成熟的母猪。然而，在哺乳期，成熟的母猪消耗更多的饲料，因此钙和磷，并保留更多的钙和磷比年轻的母猪。成熟母猪的骨骼比年轻母猪的骨骼更大，更矿化，更坚固。骨重量和强度在哺乳期下降，并在随后的妊娠期增加。年轻母猪的体重和力量变化大于成年母猪。
The purpose of this study was to determine the effects of stage of the reproductive cycle and age on Ca and P metabolism and bone integrity of sows. Five-day balance studies were conducted with first- and fifth-parity sows, and sows were slaughtered during the last trimester of gestation, at the end of lactation, or during the last trimester of the subsequent gestation. First-parity sows were studied during their first gestation (n = 11), first lactation (n = 10), or second gestation (n = 10). Fifth-parity sows were examined during their fifth gestation (n = 10), fifth lactation (n = 9), or sixth gestation (n = 9). All sows were fed 1.9 kg/d of a common diet (.76% Ca and .63% P) during gestation and were allowed ad libitum access to the same diet during lactation. Digestibilities of Ca and P were much greater during lactation than during gestation. During gestation, young sows absorbed and retained more Ca and P than did mature sows. However, during lactation, mature sows consumed more feed, and therefore Ca and P, and retained more Ca and P than did young sows. Bones of mature sows were larger, more mineralized, and stronger than the bones of young sows. Bone weight and strength decreased during lactation and increased during the subsequent gestation. Changes in weight and strength were greater in young sows than in mature sows.