2024-03-29T23:31:49Zhttp://digital.csic.es/dspace-oai/requestoai:digital.csic.es:10261/2124422021-03-18T16:23:38Zcom_10261_63com_10261_6col_10261_316
00925njm 22002777a 4500
dc
Dias, R. S.
author
López, Secundino
author
Borgatti, L. M. O.
author
Kebreab, E.
author
Vitti, D. M. S. S.
author
Abdalla, A. L.
author
Appuhamy, J.A.D.R.N.
author
France, J.
author
2019
A reliable determination of endogenous phosphorus (P) excretion is required to measure P utilization in chickens accurately. The objective of this study was to investigate phosphorus (P) retention in broilers fed diets formulated with different feed ingredients. Sixty-four 15-d old broiler chicks were fed diets in which part of the dietary P was provided from dicalcium phosphate, maize, barley or soybean. Level of supplementation of each ingredient was calculated to provide two levels of total P (4.5 or 5.0 g kg feed). Birds received a single injection of 3 MBq ofP to determine endogenous P excretion using the isotope dilution technique. Four days after injection, blood and excreta were collected for analysis of inorganic and radioactive P. There were no differences among diets in total (p = 0.37) or endogenous (p = 0.65) P excretion or in P retention (p = 0.37) regardless of the supplemental feed material used in each diet. Daily P retention was increased (p = 0.004) as P intake increased, but the proportion of P ingested that was retained was not affected (p = 0.23) by the level of dietary P. The use of an isotopic tracer allows for accurate estimation of endogenous P in excreta, ranging from 0.24 to 0.42 mg P g dry matter intake. The retention of P in growing chickens was not changed when 10-20 % of total P was provided by maize, barley or soybean.
Scientia Agricola 76: 18- 23 (2019)
http://hdl.handle.net/10261/212442
10.1590/1678-992x-2017-0228
http://dx.doi.org/10.13039/501100001804
Chickens
Endogenous
Isotope dilution
Phosphorus retention
Phosphorus utilization in broilers fed with diets supplemented with different feed ingredients