Zinc excretion from weaned pigs relates to zinc intake: a meta-analysis

TY - ABST

T1 - Zinc excretion from weaned pigs relates to zinc intake: a meta-analysis

AU - Hansen, Sally

AU - Nielsen, Tina Skau

PY - 2021/8

Y1 - 2021/8

N2 - Several studies have shown that a high dietary zinc (Zn) content in pig diets leads to a high faecal Zn excretion, which is considered an environmental issue. However, there is limited knowledge about the relation between Zn intake andfaecal Zn excretion in newly weaned pigs. Therefore, we performed a literature search for peer-reviewed experiments, where different dietary Zn levels were provided to pigs the first three weeks post-weaning and daily Zn intake andfaecal excretion measured in mg/d. The meta-analysis included six studies with different dietary Zn sources and levels (49 data points in total). The statistical analysis showed a linear relationship between daily Zn intake and Zn excretionin faeces, uninfluenced by the Zn source. During the first week post-weaning, the linear relationship showed a slope of 0.18 (P<0.01, R2=0.95), which was significantly lower than the slope for the second and third week post-weaning. The positive linear relationship between the Zn intake and the Zn excretion in faeces in the second and third weeks were similar, with a slope of 0.84 (P<0.01, R2=0.94). Based on these results, the daily faecal excretion of Zn appears to belower at a given Zn intake the first week post-weaning, indicating a higher Zn uptake compared with the following two weeks post-weaning. We applied the identified linear relationships between daily Zn intake and faecal Zn excretionduring week 1 and 2-3 post-weaning on our own data of daily Zn intake in 180 pigs distributed to six different doses of total Zn in the diet (155, 492, 1,024, 1,604, 2,056, or 2,419 ppm) the first 3 weeks post-weaning. The calculatedaverage daily excretion of Zn during week 1 post-weaning was between 0 and 47 mg/d/pig. The excretion increased during week 2-3 to between 143 and 1,651 mg/d/pig depending on the Zn intake. This shows the calculated dailyZn excretion is up to 35 times higher in week 2-3 compared to week 1 post-weaning. Moreover, the Zn excretion in week 2-3 is about 11 times higher when the diet contains 2,419 compared to 155 ppm Zn. Overall, the results of thismeta-analysis can be used to estimate the daily Zn excretion from pigs the first three weeks post-weaning when the daily Zn intake is known.

AB - Several studies have shown that a high dietary zinc (Zn) content in pig diets leads to a high faecal Zn excretion, which is considered an environmental issue. However, there is limited knowledge about the relation between Zn intake andfaecal Zn excretion in newly weaned pigs. Therefore, we performed a literature search for peer-reviewed experiments, where different dietary Zn levels were provided to pigs the first three weeks post-weaning and daily Zn intake andfaecal excretion measured in mg/d. The meta-analysis included six studies with different dietary Zn sources and levels (49 data points in total). The statistical analysis showed a linear relationship between daily Zn intake and Zn excretionin faeces, uninfluenced by the Zn source. During the first week post-weaning, the linear relationship showed a slope of 0.18 (P<0.01, R2=0.95), which was significantly lower than the slope for the second and third week post-weaning. The positive linear relationship between the Zn intake and the Zn excretion in faeces in the second and third weeks were similar, with a slope of 0.84 (P<0.01, R2=0.94). Based on these results, the daily faecal excretion of Zn appears to belower at a given Zn intake the first week post-weaning, indicating a higher Zn uptake compared with the following two weeks post-weaning. We applied the identified linear relationships between daily Zn intake and faecal Zn excretionduring week 1 and 2-3 post-weaning on our own data of daily Zn intake in 180 pigs distributed to six different doses of total Zn in the diet (155, 492, 1,024, 1,604, 2,056, or 2,419 ppm) the first 3 weeks post-weaning. The calculatedaverage daily excretion of Zn during week 1 post-weaning was between 0 and 47 mg/d/pig. The excretion increased during week 2-3 to between 143 and 1,651 mg/d/pig depending on the Zn intake. This shows the calculated dailyZn excretion is up to 35 times higher in week 2-3 compared to week 1 post-weaning. Moreover, the Zn excretion in week 2-3 is about 11 times higher when the diet contains 2,419 compared to 155 ppm Zn. Overall, the results of thismeta-analysis can be used to estimate the daily Zn excretion from pigs the first three weeks post-weaning when the daily Zn intake is known.

U2 - 10.3920/978-90-8686-918-3

DO - 10.3920/978-90-8686-918-3

M3 - Conference abstract in proceedings

SN - 978-90-8686-366-2

T3 - EAAP Book of Abstracts

SP - 361

EP - 361

BT - Book of Abstracts of the 72nd Annual Meeting of the European Federation of Animal Science

A2 - Strandberg, E.

A2 - Pinotti, L.

A2 - Messori, S.

A2 - Kenny, D.

A2 - Lee, M.

A2 - Hocquette, J.F.

A2 - Cadavez, V.A.P.

A2 - Millet, S.

A2 - Evans, R.

A2 - Veldkamp, T.

A2 - Pastell, M.

A2 - Pollott, G.

PB - Wageningen Academic Publishers

T2 - 72nd Annual Meeting of the European Federation of Animal Science

Y2 - 29 August 2021 through 3 September 2021

ER -