Energy and phosphorus utilization of pulses fed to broiler chickens

Comparison of different protein sources on the phosphorus digestibility of soybean meal for broiler chickens determined using the regression method

“…Additionally, the digestibility values reported by Mutucumarana et al (2015) were substantially higher than those determined in our study with similar methodologies (57.8 and 35.3%), which may be attributed to the different Ca:P ratio, longer length of the trial, or different age of birds (from 21 to 28 d) in their trial. The 3-day feeding period used in the present study is consistent with previous P digestibility trials ( Adekoya et al, 2021 ; Dilelis et al, 2021 ; Adekoya and Adeola, 2023 ; Haetinger and Adeola, 2023 ) designed to evaluate the P digestibility of a test ingredient and minimize confounding factors. One of such factors is physiological adaptation to low P diets that could increase P digestibility ( Li et al, 2015 ; Perryman et al, 2016 ) and was shown to significantly increase P digestibility when feeding test diets for 5 compared with 2 d ( Babatunde et al, 2019a , b ).…”

Digestible calcium equivalency of phytase and nutrient utilization of broiler chickens fed graded levels of limestone or phytase during the starter phase

“…Nevertheless, the effectiveness of phytase could also significantly depend on dietary Ca, particularly in diets with low P levels. The polyanionic nature of phytate molecule is notably proficient in chelating divalent cations, such as Ca, leading to the formation of mineral-phytate complexes ( Tamim et al, 2004 ; Selle et al, 2009 ; Adekoya and Adeola, 2023 ). A P-deficient diet could invariably contain a greater proportion of phytate-P per unit of total P, leading to an alteration in the Ca: phytate molar ratio.…”