Effects of a multi-enzyme complex on growth performance, nutrient utilization and bone mineralization of meat duck

Table 4 Serum calcium and phosphorus contents, and alkaline phosphatase activity of ducks at 14 d and 35 d of age ¹ , Exp. 1

Item	Enzyme	14 d of age			35 d of age
Item	Enzyme	Ca ² , mmol/L	P, mmol/L	ALP, mmol/L	Ca, mmol/L	P, mmol/L	ALP, mmol/L
Treatment³
T1:PC	-	2.35	2.37	446.0	2.65	2.79^a	474.2
T2:NC1	-	2.35	2.52	508.7	2.52	2.51^ab	379.5
T3:NC1	+	2.22	2.6	474.6	2.52	2.29^ab	383.7
T4:NC2	-	2.12	2.55	565.1	2.2	2.05^b	382.1
T5:NC2	+	2.20	2.52	530.8	2.65	2.77^a	420.5
SEM		0.17	0.16	29.07	0.16	0.17	56.45
P-Value		0.858	0.882	0.088	0.317	0.034	0.724
P-Value of factorial analysis⁴
NR⁵		0.496	0.879	0.119	0.590	0.979	0.719
Enzyme		0.891	0.879	0.327	0.237	0.210	0.698
NR × Enzyme		0.585	0.718	0.997	0.237	0.027	0.755

^a,bMeans in the same row, values with the same lowercase letter superscripts mean no significant difference (P > 0.05), different lowercase letter mean significant difference (P < 0.05).
¹Data are means of 7 ducks per treatment.
²Ca = Calcium, P = Phosphorus, ALP = Alkaline phosphatase.
³ PC = positive control; NC1 = −70 kcal/kg, −2.0% digestible amino acids (DAA), −0.1 percentage point available P (avP), −0.1 percentage point Ca; NC2 = −100 kcal/kg, −2.5% DAA, −0.15 percentage point avP, −0.12 percentage point Ca.
⁴Using negative control treatments with or without enzyme supplementation.
⁵NR = Apparent metabolizable energy, digestible amino acid, available P and Ca reduction.

ISSN: 2049-1891