Table 5.

Sequential extraction of Se from faecal samples collected on day 14.

Extraction steps	IL	IH	OL	OH	P values
	Mean ± SE (μg kg−1)				Form	Dose	Form × dose
Step 1: Water- and acid-soluble	54.7 ± 3.89	76.3 ± 5.65	51.2 ± 4.38	71.0 ± 5.00	0.470	< 0.001 ***	0.959
Step 2: Exchangeable	6.06 ± 0.730	11.2 ± 0.85	6.63 ± 0.431	10.8 ± 0.41	0.710	< 0.001 ***	0.317
Step 3: OM-bound and/or specific sorption on Fe/Al hydroxides	45.0 ± 2.57	74.4 ± 1.94	36.6 ± 2.50	67.3 ± 2.91	< 0.001 ***	< 0.001***	0.556
Step 4: Residual	56.2 ± 6.31	76.8 ± 8.76	61.3 ± 11.42	83.1 ± 8.56	0.589	0.038*	0.919

Significant values are in bold.

OH organic minerals offered at higher doses, OL organic minerals offered at lower doses, IH inorganic minerals offered at higher doses, IL inorganic minerals offered at lower doses. The symbol ‘*’ and ‘***’ indicate statistical significances of ANOVA test at p-value < 0.05 and < 0.001, respectively.