Regulation of bone phosphorus retention and bone development possibly by related hormones and local bone-derived regulators in broiler chicks

Table 1 The correlation coefficients between bone phosphorus retention or bone development and serum related hormones in broilers at 14, 28 and 42 days of age ^a

Traits	Serum 1, 25(OH)₂D₃	Serum PTH
D 14
Tibia ash phosphorus concentration	0.198	0.073
TP_TA	0.040	0.129
Tibia BMC	0.011	0.129
Tibia BMD	0.031	0.135
Tibia BBS	0.056	0.115
Tibia ash concentration	0.341	−0.300
D 28
Tibia ash phosphorus concentration	0.013	−0.538**
TP_TA	0.389*	−0.597**
Tibia BMC	0.425*	−0.590**
Tibia BMD	0.461**	−0.608**
Tibia BBS	0.393*	−0.609**
Tibia ash concentration	0.419*	−0.587**
D 42
Tibia ash phosphorus concentration	0.486**	0.224
TP_TA	0.450*	0.169
Tibia BMC	0.422*	0.220
Tibia BMD	0.430*	0.176
Tibia BBS	0.299	0.287
Tibia ash concentration	0.476*	0.089

^a Data represent the correlation coefficients between bone P retention or bone development and serum related hormones in broilers at 14 (n = 39/40), 28 and 42 (n = 31/32) d of age. * P < 0.05, ** P < 0.01. TP_TA The total phosphorus accumulation in tibia ash, BMC Bone mineral concentration, BMD Bone mineral density, BBS Bone breaking strength, 1,25(OH)₂D₃ 1,25-dihydroxyvitamin D₃, PTH Parathyroid hormone

ISSN: 2049-1891