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

Table 3 Analyzed and calculated chemical composition and digestibility of nutrients of the experimental diets (DK, VN and TH)

	Analyzed/Estimated ( in vivo)			Calculated from feedstuff tables¹
	DK	VN	TH	DK	VN	TH	Deviation²	RMSEP³
Chemical composition, % DM
Dry matter, %	90.1	91.5	90.0	86	89	87	3.2	0.5
Ash	5.0	5.9	5.7	5.7	6.2	6.6	-0.6	0.2
Crude Protein (N × 6.25)	17.5	19.6	23.8	17.5	19.3	22.6	0.5	0.4
Crude fat	3.1	13.3	5.6	2.4	12.5	4.0	1.0	0.3
Starch and sugar	56.2	32.6	48.2	54.7	35.8	48.5	-0.7	1.4
Total dietary fibre	18.3	28.6	16.7	16.9	27.5	15.0	1.4	0.2
Crude fibre	4.2	9.8	3.7	4.1	9.4	3.4	0.3	0.1
Phosphorus	0.57	0.52	0.77	0.64	0.55	0.77	-0.06	0.02
Total digestibility, %
Dry Matter (DM)	85	73	85	82	71	82	2.3	0.4
Organic Matter (OM)	86	74	86	86	75	87	-0.9	0.4
Carbon	85	73	84	84⁴	72	85	0.1	0.6
Protein	81	73	80	83	76	82	-2.6	0.3

DM Dry matter, DK Danish diet, VN Vietnamese diet, TH Thai diet.
¹Bach Knudsen [19], Just et al. [25], NRC [26] Vils and Sloth [27].
²Deviations, systematic difference between the calculated using table values and the experimental estimated value.
³RMSEP, root mean square error of prediction.
⁴Carbon digestibility calculated by the equation: dcCarbon (%) = -12.15 +1.117 dcOM (%), using data from Jørgensen [28].

ISSN: 2049-1891