2026-04-14T02:46:49Zhttps://recercat.cat/oai/requestoai:recercat.cat:20.500.12327/37702025-10-22T10:55:46Zcom_2072_4428com_2072_4427col_2072_487896
RECERCAT
author
Tous, Núria
author
Francesch, Maria
author
Tarradas, Joan
author
Badiola, Ignacio
author
Perez de Rozas, Ana
author
Fàbrega-Romans, Emma
author
Ballester Devis, Maria
author
Quintanilla, Raquel
author
Torrallardona, David
other
Producció Animal
group
Benestar Animal
group
Genètica i Millora Animal
group
Nutrició Animal
group
Sanitat Animal
2025-10-22T10:55:46Z
2025-10-22T10:55:46Z
2025-01-13
http://hdl.handle.net/20.500.12327/3770
Phosphorous is essential for many metabolic functions and the
constitution of bones. Poultry have limited ability to use phosphorous from diets,
which is mainly excreted and causes environmental concern. For this reason, diets
are commonly supplemented with inorganic phosphorus and phytases. It has been
suggested that chickens can adapt to an early nutrient restriction by increasing its
efficiency of utilization, an adaptation that has been defined as nutritional
conditioning. The aim of this study was to investigate a strategy of phosphorous
nutritional conditioning by feeding low phosphorous diets during the first week of
life as a strategy to improve the efficiency of phosphorous utilization later in life. To
test this, 600 male broiler chickens were fed either a standard (control group) or a
phosphorous-deficient diet (conditioned group) during the first week of life. Later in
life, the effect of conditioning was tested using standard or P-deficient diets during
the finishing phase (21–43 d). Conditioning did not affect overall performance,
despite finding evidence for reduced relative phosphorous excretion between days
19 to 21, increased duodenal gene expression for the phosphorous transporter
SLC34A2 at day 30 (−6% and +17%, respectively), and tendencies for improved
phosphorous digestibility (+7%) and tibia mineralization (+6%) at the end of the trial.
It is concluded that phosphorous nutritional conditioning early in life can increase
subsequent dietary phosphorous utilization and bone mineralization in poultry,
although it may not be able to counteract severe phosphorous deficiencies. Further
research is required to assess the extent to which phosphorous supplementation in
post-conditioning diets may be reduced with this strategy without compromising
performance
eng
Long-Term Effects of Early Low-Phosphorous Nutritional Conditioning on Broiler Chicken Performance, Bone Mineralization, and Gut Health Under Adequate or PhosphorousDeficient Diets
info:eu-repo/semantics/article