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Table 5 Calculated intake, retention and excretion of nitrogen (N) and phosphorus (P) based on the Danish Manure Normative System (DMNS) using standard values or the experimental values for DK, VN and TH treatments regarding N and P contents in the diets and feed intake

From: Models to quantify excretion of dry matter, nitrogen, phosphorus and carbon in growing pigs fed regional diets

Diet DK standard1 DK VN TH
Weight gain, g/d 840 719 810 465
Feed intake, kg/d 2.26 1.80 1.78 1.43
N:     
N intake, g/d 52.7 45.4 51.1 49.0
N retention, g/d 24.9 21.3 24.0 13.8
N excretion, g/d (total) 27.8 24.1 27.1 35.2
In faeces, g/d 10.0 8.63 9.70 9.31
In urine, g/d 17.8 15.5 17.4 25.9
P:     
P intake, g/d 9.18 9.24 8.47 9.91
P retention, g/d 4.62 3.96 4.45 2.56
P excretion, g/d (total) 4.56 5.29 4.02 7.35
In faeces, g/d 4.59 4.62 4.02 4.95
In urine, g/d 0.03 0.67 02 2.40
  1. 1Mean values for the weight interval 30 to 105 kg. Diet content: protein 145.8 g/kg (23.3 g N/kg); phosphorus 4.06 g/kg. Digestibility: protein 81%; phosphorus 50%. Retention per kg gain: 29.6 g N; 5.5 g P (Fernández [22]).
  2. 2The urinary excretion was calculated to be-0.22 g/d and was set to 0.