Table 5 Sequential extraction of Se from faecal samples collected on day 14.

From: The impact of feeding supplemental minerals to sheep on the return of micronutrients to pasture via urine and faeces

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

  1. Significant values are in bold.
  2. 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.
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