Corrigendum

The paper entitled ‘Prediction of utilizable true protein of mixed rations for sheep using an in vitro incubation technique’ published in Archives of Animal Nutrition, April 2007; 61(2): 103 – 113 contained errors in Tables III and V on page 110.

The tables should have read:

Table III. N-intake, N-excretion and N-retention during the N-balance period.

Ration	N intake [g · d^−1]	Faecal N [g · d^−1]	Urinary N [g · d^−1]	N retention [g · d^−1]
1	13.73 ± 0.72	6.86 ± 0.36	3.90 ± 0.62	2.98 ± 0.85
2	15.00 ± 0.75	7.15 ± 0.79	5.30 ± 0.96	2.55 ± 0.64
3	15.37 ± 0.81	7.60 ± 0.78	5.30 ± 0.37	2.47 ± 1.11
4	17.41 ± 0.87	6.90 ± 0.45	6.54 ± 1.70	3.95 ± 1.42
5	18.61 ± 0.93	6.44 ± 1.30	7.76 ± 1.52	4.40 ± 1.95
6	19.01 ± 0.95	7.77 ± 0.76	7.82 ± 0.63	3.42 ± 0.65
7	20.38 ± 1.02	7.41 ± 0.83	7.66 ± 0.94	5.32 ± 0.78
8	21.93 ± 1.10	7.20 ± 1.05	10.27 ± 1.36	4.46 ± 1.32
9	23.23 ± 1.16	6.92 ± 1.24	10.83 ± 0.78	5.48 ± 0.83
10	24.71 ± 1.24	6.15 ± 0.66	13.67 ± 1.49	4.90 ± 0.41
11	23.62 ± 1.18	7.40 ± 1.04	12.20 ± 1.00	4.01 ± 0.82
12	24.81 ± 1.24	7.49 ± 0.89	10.97 ± 3.16	6.35 ± 2.08

Table V. Result of regression analysis between N-retention [y, g DM · d⁻¹] and intakes of crude protein (CP), true protein (TP), in vitro utilizable true protein (in vitro-uTP) and in vivo utilizable true protein (in vivo-uTP) [x, g DM · d⁻¹].

Intake of	Equation	r^2	n	p
CP	y = 0.04 x −0.90	0.69	12	<0.001
TP	y = 0.05 x −0.45	0.67	12	<0.001
In vitro-uTP	y = 0.04 x −0.68	0.72	12	<0.001
In vivo-uTP	y = 0.08 x −1.49	0.69	12	<0.001

On page 112, line 17–18, should read 0.69, 0.67, 0.72 and 0.69.