Table 3 Mineral excretion in urine and faeces and retention in sheep (Charolais × Suffolk-Mule) on day 14 as a % of the total element intake on day 13 (% w/w) and total balance results.

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

Elements

Variables

Treatments

P-values of the ANOVA test

IL

IH

OL

OH

Form

Dose

Form × dose

Se

Excretion to urine (% of total intake)

11.2 ± 1.39

9.42 ± 0.670

13.0 ± 0.33

7.80 ± 0.806

0.936

0.001***

0.064

Excretion to faeces (% of total intake)

52.2 ± 2.27

45.5 ± 3.14

50.9 ± 2.34

43.3 ± 2.51

0.511

0.016*

0.872

Retention (% of total intake)

36.6 ± 1.85

45.1 ± 3.11

36.1 ± 2.33

48.9 ± 2.14

0.478

 < 0.001***

0.377

Zn

Excretion to urine (% of total intake)

6.62 ± 1.901

8.20 ± 1.819

8.89 ± 1.849

7.63 ± 1.102

0.525

0.905

0.298

Excretion to faeces (% of total intake)

114 ± 10.9

111 ± 13.8

115 ± 9.4

96.9 ± 6.74

0.522

0.309

0.474

Retention (% of total intake)

− 20.7 ± 12.55

− 19.1 ± 15.15

− 23.8 ± 9.54

− 4.54 ± 6.571

0.593

0.336

0.415

Cu

Excretion to urine (% of total intake)

0.39 ± 0.078

0.32 ± 0.038

0.43 ± 0.040

0.34 ± 0.037

0.493

0.055

0.906

Excretion to faeces (% of total intake)

97.6 ± 4.33

89.0 ± 2.04

92.8 ± 2.06

79.4 ± 4.82

0.081

0.012*

0.538

Retention (% of total intake)

1.99 ± 4.374

10.6 ± 2.02

6.74 ± 2.062

20.3 ± 4.84

0.083

0.012*

0.538

Mn

Excretion to urine (% of total intake)

0.11 ± 0.026

0.12 ± 0.017

0.12 ± 0.018

0.11 ± 0.019

0.891

0.981

0.762

Excretion to faeces (% of total intake)

95.3 ± 2.55

91.1 ± 5.31

90.2 ± 5.74

85.9 ± 7.34

0.326

0.419

0.995

Retention (% of total intake)

4.57 ± 2.562

8.76 ± 5.317

9.70 ± 5.744

14.0 ± 7.34

0.327

0.420

0.994

S

Excretion to urine (% of total intake)

55.8 ± 5.83

59.6 ± 3.52

59.5 ± 4.33

54.4 ± 3.46

0.818

0.860

0.232

Excretion to faeces (% of total intake)

40.5 ± 1.19

42.5 ± 2.75

41.2 ± 2.43

38.7 ± 3.57

0.547

0.932

0.393

Retention (% of total intake)

3.63 ± 5.358

− 2.17 ± 5.216

− 0.64 ± 5.546

6.89 ± 5.685

0.556

0.832

0.114

P

Excretion to urine (% of total intake)

0.19 ± 0.057

0.11 ± 0.028

0.07 ± 0.009

0.12 ± 0.027

0.189

0.734

0.112

Excretion to faeces (% of total intake)

94.3 ± 4.31

94.6 ± 4.06

93.9 ± 3.53

83.5 ± 6.73

0.256

0.324

0.297

Retention (% of total intake)

5.47 ± 4.310

5.25 ± 4.070

6.08 ± 3.523

16.4 ± 6.73

0.252

0.323

0.302

  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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