Dietary calcium requirements of broilers fed a conventional corn-soybean meal diet from 1 to 21 days of age

Table.4 Effect of dietary calcium (Ca) level on serum parameters and tibia ALP activities of broilers on d 21¹

Analyzed dietary Ca level, %	Serum Ca content, mg/100 mL	Serum inorganic P, mg/100 mL	Serum Ca:inorganic P ratio	Serum ALP Activity, King unit/100 mL	Tibia ALP Activity, King unit/g prot
0.59	8.63	6.22	1.39	312^cd	384^a
0.70	8.65	7.09	1.23	380^bc	350^ab
0.80	8.21	6.78	1.22	304^cd	271^c
0.88	8.50	7.14	1.19	345^bcd	305^bc
0.98	8.95	6.92	1.30	294^d	340^ab
1.09	8.63	6.81	1.27	396^b	348^ab
1.18	8.76	6.36	1.39	486^a	355^ab
SEM	0.553	0.534	0.133	51.9	57.1
P-value
Ca level	0.43	0.06	0.08	< 0.0001	0.04
Linear	–	–	–	0.0003	0.82
Quadratic	–	–	–	0.002	0.005

¹Data represented the means of 6 replicates (n = 6)
²Abbreviation: ALP alkaline phosphatase
^a-dMeans within a column with unlike superscript letters were significantly different (P < 0.05)

ISSN: 2049-1891