PMID- 28971283 OWN - NLM STAT- MEDLINE DCOM- 20180709 LR - 20191210 IS - 1573-7438 (Electronic) IS - 0049-4747 (Linking) VI - 50 IP - 2 DP - 2018 Feb TI - Non-phytate phosphorus requirement for broilers from 8 to 21 days of age under heat stress conditions. PG - 317-325 LID - 10.1007/s11250-017-1434-1 [doi] AB - Two trials were conducted to determine the non-phytate phosphorus (nPP) requirement for broiler under heat stress. In both trials, birds were distributed in a completely randomized 4 x 2 factorial design with four nPP concentrations: 0.25, 0.35, 0.45, and 0.55%, and two Ca supply techniques: Ca fixed at 0.899% (CaF) or varying along with nPP aiming a 2:1 Ca to nPP ratio (CaV). Both trials had eight pens/treatment, with nine and five birds/pen for exp. 1 and exp. 2, respectively. nPP concentration had no effect on feed intake (FI), body weight gain (BWG), feed conversion ratio (FCR), nor fat deposition ratio (FDR). nPP levels showed a linear effect on protein deposition ratio (PDR) only for CaF diets. The nPP levels had a significant effect, regardless the technique adopted, on tibia phosphorus (TibP), which varied quadratically, on tibia calcium (TibCa) that increased quadratically and linearly, respectively, on CaF and CaV diets, and on tibia ash (TibAsh) that showed a quadratic effect for both. No effect was observed on Ca to P ratio in the tibia (TibCa:TibP). The nPP levels showed a linear increase effect over phosphorus intake (PI), phosphorus excreted (PE), and phosphorus retained (PR), and a linear decrease effect on phosphorus retention coefficient (PRC). Therefore, the nPP requirement for broilers from 8 to 21 days of age that provided better performance and bone variables were 0.250 and 0.484%, respectively, for CaF diets and 0.250 and 0.511%, respectively, for CaV diets. FAU - Cardoso, Evandro Ferreira AU - Cardoso EF AD - Department of Animal Science, Universidade Federal de Vicosa, Av. Peter Henry Rolfs, s/n, Campus Universitario, Vicosa, Minas Gerais, 36570-000, Brazil. efczoo@gmail.com. FAU - Donzele, Juarez Lopes AU - Donzele JL AD - Department of Animal Science, Universidade Federal de Vicosa, Av. Peter Henry Rolfs, s/n, Campus Universitario, Vicosa, Minas Gerais, 36570-000, Brazil. FAU - de Oliveira Donzele, Rita Flavia Miranda AU - de Oliveira Donzele RFM AD - Department of Animal Science, Universidade Federal de Vicosa, Av. Peter Henry Rolfs, s/n, Campus Universitario, Vicosa, Minas Gerais, 36570-000, Brazil. FAU - Sufiate, Bruna Leite AU - Sufiate BL AD - Department of Biochemistry and Molecular Biology, Universidade Federal de Vicosa, Av. Peter Henry Rolfs, s/n, Campus Universitario, Vicosa, Minas Gerais, 36570-000, Brazil. FAU - Silva, Amanda Dione AU - Silva AD AD - Department of Animal Science, Universidade Federal de Vicosa, Av. Peter Henry Rolfs, s/n, Campus Universitario, Vicosa, Minas Gerais, 36570-000, Brazil. FAU - Tizziani, Tarciso AU - Tizziani T AD - Department of Animal Science, Universidade Federal de Vicosa, Av. Peter Henry Rolfs, s/n, Campus Universitario, Vicosa, Minas Gerais, 36570-000, Brazil. LA - eng PT - Evaluation Study PT - Journal Article DEP - 20171003 PL - United States TA - Trop Anim Health Prod JT - Tropical animal health and production JID - 1277355 RN - 0 (Calcium, Dietary) RN - 0 (Phosphorus, Dietary) RN - 27YLU75U4W (Phosphorus) RN - 7IGF0S7R8I (Phytic Acid) SB - IM MH - Animal Feed/analysis MH - Animal Nutritional Physiological Phenomena MH - Animals MH - Calcium, Dietary/*administration & dosage MH - Chickens/*metabolism MH - Diet/veterinary MH - *Hot Temperature MH - Male MH - Phosphorus MH - Phosphorus, Dietary/*administration & dosage MH - Phytic Acid MH - Random Allocation MH - *Stress, Physiological MH - Tibia/chemistry MH - Weight Gain OTO - NOTNLM OT - Bone mineralization OT - Ca to nPP ratio OT - Heat stress OT - Mineral excretion OT - Thermal environment EDAT- 2017/10/04 06:00 MHDA- 2018/07/10 06:00 CRDT- 2017/10/04 06:00 PHST- 2017/02/06 00:00 [received] PHST- 2017/09/20 00:00 [accepted] PHST- 2017/10/04 06:00 [pubmed] PHST- 2018/07/10 06:00 [medline] PHST- 2017/10/04 06:00 [entrez] AID - 10.1007/s11250-017-1434-1 [pii] AID - 10.1007/s11250-017-1434-1 [doi] PST - ppublish SO - Trop Anim Health Prod. 2018 Feb;50(2):317-325. doi: 10.1007/s11250-017-1434-1. Epub 2017 Oct 3.