Effects of dietary calcium and available phosphorus levels and phytase supplementation on performance, bone mineral density, and serum biochemical bone markers in aged white egg-laying hens.
Effects of dietary calcium and available phosphorus levels and phytase supplementation on performance, bone mineral density, and serum biochemical bone markers in aged white egg-laying hens.
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DOI：
10.1016/j.psj.2020.06.082
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发表时间：
2020-11
期刊：
影响因子：
4.4
通讯作者：
Korver DR
中科院分区：
文献类型：
--
作者：
Bello A;Dersjant-Li Y;Korver DR
外源性植酸酶的补充增加了磷和钙的可用性，使饮食减少，而不会对生产力或骨骼健康产生负面影响。在68 ~ 78周龄的蛋鸡中，研究了低磷和低钙日粮中添加布丘氏菌植酸酶（BSP）对蛋鸡生产性能、体重、蛋壳质量、血清骨生化指标和骨密度的影响。100只母鸡饲喂5种日粮中的1种（n = 20/处理），包括含0.35% avP和3.5% Ca的阳性对照（PC），PC使avP和Ca水平适度降低，分别为饲料的0.187%和0.159（NC 1）和（NC 2）分别严重减少日粮的0.231%和0.275%（分别减少66%和7.9%）。其他饮食是补充有600 FTU/kg BSP的NC 1或NC 2（分别为NC 1 + BSP或NC 2 + BSP）。NC 1维持了产蛋量和饲料转化率，但NC 2比PC分别低11.9%和高12.3%，这一情况通过补充BSP得到缓解。日粮对FI和蛋壳质量的影响遵循类似的模式。NC 1和NC 2的体重分别比PC低2.9%和6.1%; BSP缓解了体重下降。血清吡啶啉（骨吸收标志物）在NC 2母鸡比其他组高20 - 27%，对其他骨标志物没有影响。NC 1的近端干骺端总骨密度和骨小梁间隙骨密度分别比PC低8.4%和15.2%，NC 2分别比PC低12.1%和26.7%。补充BSP完全缓解了NC 1中骨密度测定指标的下降，但仅部分缓解了NC 2中的骨密度测定指标的下降。NC 1母鸡保持性能，但体重和骨质量下降，植酸酶补充恢复生产力，体重和骨质量。相对于其他组，NC 2母鸡中的Ca和avP缺乏通过600 FTU/kg BSP部分缓解。
Exogenous phytase supplementation increases P and Ca availability to allow for the dietary reductions without negative consequences on productivity or skeletal health. Effects of a Buttiauxella sp. phytase (BSP) supplemented in available P (avP)-reduced and Ca-reduced diets on performance, BW, eggshell quality, serum biochemical bone markers, and bone densitometry were evaluated in egg-laying hens from 68 to 78 wk of age. One hundred hens were fed 1 of 5 diets (n = 20/treatment), including a positive control (PC) with 0.35% avP and 3.5% Ca, and the PC moderately reduced in avP and Ca levels by 0.187 and 0.159% of the diet (by 53 and 4.5%), respectively, (NC1) or severely reduced by 0.231 and 0.275% of the diet (by 66 and 7.9%), respectively, (NC2). Other diets were the NC1 or NC2 supplemented with BSP at 600 FTU/kg (NC1 + BSP or NC2 + BSP, respectively). Egg production and feed conversion ratio were maintained by NC1 but were 11.9% lower and 12.3% higher, respectively, with the NC2 than the PC, which was alleviated by supplemental BSP. Diet effects on FI and eggshell quality followed a similar pattern. Body weight was 2.9% lower for NC1, and 6.1% for NC2 than the PC; BSP alleviated the decreased BW. Serum pyridinoline (bone resorption marker) was 20 to 27% higher in NC2 hens than in the other groups, with no effects on other bone markers. Total and trabecular space bone mineral density in the proximal metaphysis were 8.4 and 15.2% lower for NC1, respectively, and 12.1 and 26.7% lower for NC2, respectively, than PC. Supplemental BSP completely alleviated the decreased bone densitometry measures in NC1, but only partially in NC2. The NC1 hens maintained performance but had decreased BW and bone quality; phytase supplementation restored productivity, BW, and bone quality. The Ca and avP deficiencies in the NC2 hens relative to other groups were partially alleviated by the 600 FTU/kg BSP.
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影响因子：
4.4
作者：
Saunders-Blades, J. L.;MacIsaac, J. L.;Anderson, D. M.
通讯作者：
Anderson, D. M.
影响因子：
4.4
作者：
Hughes, A. L.;Dahiya, J. P.;Classen, H. L.
通讯作者：
Classen, H. L.
DOI：
10.4025/actascianimsci.v36i3.21952
发表时间：
2014-09-01
期刊：
Acta Scientiarum. Animal Sciences
影响因子：
--
作者：
Geraldo, Adriano;Gomes, Karina Rodrigues Aurora;Nogueira, Filipe Soares
通讯作者：
Nogueira, Filipe Soares
影响因子：
4.4
作者：
Liu, N.;Liu, G. H.;Ru, Y. J.
通讯作者：
Ru, Y. J.
影响因子：
4.4
作者：
Kim, W. K.;Bloomfield, S. A.;Ricke, S. C.
通讯作者：
Ricke, S. C.