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

Table 5 Tibia ash, calcium and phosphorus contents 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	Ash,%	Ca ² , %	P,%	Ash,%	Ca, %	P,%
Treatment³
T1:PC	-	44.22^a	16.13^a	10.19^ab	53.77^a	20.51^a	7.84^a
T2:NC1	-	41.51^b	14.75^b	10.07^ab	53.86^a	20.67^a	7.60^a
T3:NC1	+	43.31^ab	15.97^a	10.31^a	53.84^a	20.69^a	8.04^b
T4:NC2	-	37.40^c	13.55^c	9.44^c	50.10^b	18.96^b	6.98^c
T5:NC2	+	40.11^b	14.47^b	9.93^b	52.66^a	20.39^a	7.62^a
SEM		0.73	0.28	0.10	0.55	0.18	0.14
P-Value		<0.01	<0.01	<0.01	<0.01	<0.01	<0.01
P-Value of factorial analysis⁴
NR⁵		<0.01	<0.01	<0.01	<0.01	<0.01	<0.01
Enzyme		<0.01	<0.01	<0.01	0.032	<0.01	<0.01
NR × Enzyme		0.611	0.568	0.545	0.029	<0.01	0.277

^{a,b ,c}Means 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.
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