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Table 5 Tibia ash, calcium and phosphorus contents of ducks at 14 d and 35 d of age 1 , Exp. 1

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

Item Enzyme 14 d of age 35 d of age
Ash,% Ca 2 , % P,% Ash,% Ca, % P,%
Treatment3
    T1:PC - 44.22a 16.13a 10.19ab 53.77a 20.51a 7.84a
    T2:NC1 - 41.51b 14.75b 10.07ab 53.86a 20.67a 7.60a
    T3:NC1 + 43.31ab 15.97a 10.31a 53.84a 20.69a 8.04b
    T4:NC2 - 37.40c 13.55c 9.44c 50.10b 18.96b 6.98c
    T5:NC2 + 40.11b 14.47b 9.93b 52.66a 20.39a 7.62a
    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
  1. a,b ,cMeans 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).
  2. 1Data are means of 7 ducks per treatment.
  3. 2Ca = Calcium, P = Phosphorus.
  4. 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.
  5. 4Using negative control treatments with or without enzyme supplementation.
  6. 5NR = Apparent metabolizable energy, digestible amino acid, available P and Ca reduction.