کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
2420550 | 1552470 | 2008 | 15 صفحه PDF | دانلود رایگان |
عنوان انگلیسی مقاله ISI
Application and comparison of two models to study effects of calcium sources in sheep
دانلود مقاله + سفارش ترجمه
دانلود مقاله ISI انگلیسی
رایگان برای ایرانیان
کلمات کلیدی
ADFNDFCTPdpmCPMOSMTACacid detergent fiber - الیاف پاک کننده اسیدSra - خانمLimestone - سنگ آهکcounts per minute - شمار در هر دقیقهPhosphorus - فسفرneutral detergent fibre - فیبر مواد شوینده خنثیdry matter - ماده خشکMetabolism - متابولیسم Modelling - مدل سازیTrue digestibility - هضم واقعیCitrus pulp - پالپ مرکبcrude protein - پروتئین خامCalcium - کلسیمAlfalfa hay - یونجه وجود دارد
موضوعات مرتبط
علوم زیستی و بیوفناوری
علوم کشاورزی و بیولوژیک
علوم دامی و جانورشناسی
پیش نمایش صفحه اول مقاله
![عکس صفحه اول مقاله: Application and comparison of two models to study effects of calcium sources in sheep Application and comparison of two models to study effects of calcium sources in sheep](/preview/png/2420550.png)
چکیده انگلیسی
The aim of this research was to assess and compare two compartmental models by studying effects of different Ca sources on Ca and P metabolism of sheep. Brazilian male sheep (20) were fed a basal diet supplemented with different sources of Ca, being: limestone (L), alfalfa hay (AH), shell meal (OSM) and citrus pulp (CTP). After 21 days, each sheep was given, as a single dose via the right jugular vein, 7.4Â MBq of radio-calcium (45Ca) and 7.4Â MBq of radio-phosphorus (32P). Calcium and P metabolism were evaluated by comparing the Vitti-Dias (VD) and Fernández-Lopes (FL) models [Dias, R.S., Kebreab, E., Vitti, D.M.S.S., Roque, A.P., Bueno, I.C.S., France, J., 2006. A revised model for studying phosphorus and calcium kinetics in growing sheep. J. Anim. Sci. 84, 2787-2794; Lopes, J.B., Vitti, D.M.S.S., Abdalla, A.L., Haddad, M.L., Figueredo, A.V., Moraes, R.C.B., 2001. Modelo do fluxo biológico do fósforo de fontes de fosfato em suÃnos, usando o 32P como marcador. Rev. Bras. Zoot. 30, 165-173], by contrasting flows between gut and plasma, plasma and bone, and plasma and tissue. There were no differences in Ca and P intakes for the treatments. Ca flows from tissue and bone to plasma and vice versa were similar among treatments, though net bone and net tissue Ca retentions were higher for treatments L and OSM and lower, as well as negative, for AH and CTP (P<0.05). Net bone Ca results were consistent between the VD and FL models, although net tissue Ca retention was slightly higher for the VD. The presence of pectin in CTP and oxalate in AH could have affected Ca balance on these treatments. Total Ca absorption was higher (P<0.05) for L with both models. The chemical form of Ca in the different sources affected its metabolism, but did not affect P metabolism. Both models had higher P resorption than P absorption in bone, suggesting that the sheep were mobilizing P. It could be inferred that impaired digestion induced P mobilization from bone to supply P for metabolic needs. Both the VD and FL models had the same pattern for the P flows, and for net bone and tissue P retentions. Both models can be used to assess Ca and P kinetics in ruminants, and both suggest that our sheep tended to be deficient in Ca and P as well as that the inorganic sources of Ca were better utilized.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Animal Feed Science and Technology - Volume 143, Issues 1â4, 22 May 2008, Pages 89-103
Journal: Animal Feed Science and Technology - Volume 143, Issues 1â4, 22 May 2008, Pages 89-103
نویسندگان
R.S. Dias, E. Kebreab, D.M.S.S. Vitti, A.P. Roque, J. France,