Assessing the needs of sheep for trace elements

Suttle, N. F.

doi:10.1136/inpract.27.9.474

Cited by 12 publications

(8 citation statements)

References 14 publications

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“…Mo levels are least tolerated by cattle, followed by sheep, but are tolerated by goats (Haenlein and Anke 2011). Concentrations of vitamin B12 rise in times of Co supply and fall during periods of dietary deficiency, because Co is needed for the production of vitamin B12 by ruminant bacteria (Smith and Marston 1970;Suttle 2005). Beside all these factors, which have an impact on the concentration macrominerals and trace elements in body tissues, the reliability of reference values is another variable which warrants discussion.…”

Section: Discussionmentioning

confidence: 99%

Macromineral and trace element supply in sheep and goats in Austria

Schweinzer¹,

Iwersen²,

Drillich³

et al. 2017

Vet. Med. - Czech

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ABSTRACT:The aim of this study was to determine the supply of 25 different macrominerals (calcium, magnesium, potassium) and trace elements (aluminium, arsenic, barium, boron, cadmium, cobalt, copper, iron, lithium, lead, manganese, molybdenum, nickel, selenium, silicon, strontium, sulphur, thallium, tin, titanium, uranium, zinc), and to ascertain the presence of any over-or undersupplies. As a second objective, we undertook a comparison of our results with existing reference values from selected literature and from laboratory analyses, with the aim of classifying the obtained results into the following categories: 'deficiency' , 'adequate' and 'oversupply' . For the study, 16 sheep and four goat farms located in the Austrian states of Upper Austria (n = 12), Carinthia (n = 6) and Vorarlberg (n = 2) were selected. From every farm, five serum blood samples were obtained by puncturing the vena jugularis to evaluate the macromineral and trace element status in clinically sound female sheep (n = 80; 12 different breeds) and female goats (n = 20; Saanen goats, Boer goats). The animals were kept for dairy farming (milking and/or meat production) or for landscaping. The mean age of both sheep and goats was 3.1 years (sheep: min. 0.5, max. 10; goats: min. 1, max. 5); 44% of the studied animals were lactating and 22% were pregnant at the time of sampling. The serum blood samples were sent to a laboratory and analysed using inductively coupled plasma optical emission spectrometry and inductively coupled plasma mass spectrometry. In summary, the supply with macrominerals and trace elements compared with reference values from the laboratory was adequate for As, Ca, Fe and Mg in sheep and for As, Ca, Cu, K, Mg and Se in goats. Although all animals in our study were examined for clinical signs of disease by the local veterinarian, oversupplies in sheep for the elements K and Mo and in goats for Fe as well as undersupplies in sheep and goats for Zn could be found in the serum of the studied animals.

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Section: Discussionmentioning

confidence: 99%

Macromineral and trace element supply in sheep and goats in Austria

Schweinzer¹,

Iwersen²,

Drillich³

et al. 2017

Vet. Med. - Czech

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“…Our mean fell within the common pasture and grass range of 0.1 to 1.0 mg kg −1 , and values were of similar scale to prior studies in New Zealand and overseas (Whitehead, 1984; Trávníček et al, 2011; Sivertsen et al, 2014; Bowley et al, 2017). Some 74% of the pasture concentrations were sufficient for sheep, which require 0.05 to 0.20 mg I kg −1 (Suttle, 2005), but just 13% contained sufficient I for cattle, which require 0.3 to 0.5 mg I kg −1 (Flachowsky, 2007). Goitrogenic white clover ( Trifolium repens L.) accompanies perennial ryegrass in pastures (Suttle, 2005), likely raising animal I requirements.…”

Section: Resultsmentioning

confidence: 99%

“…Some 74% of the pasture concentrations were sufficient for sheep, which require 0.05 to 0.20 mg I kg −1 (Suttle, 2005), but just 13% contained sufficient I for cattle, which require 0.3 to 0.5 mg I kg −1 (Flachowsky, 2007). Goitrogenic white clover ( Trifolium repens L.) accompanies perennial ryegrass in pastures (Suttle, 2005), likely raising animal I requirements. Other feed is supplemented when pasture growth is low in winter.…”

Section: Resultsmentioning

confidence: 99%

“…Deficiencies cause mental and physical retardation, goiter, and potentially death (Zimmermann, 2009). Sheep and cattle require feed I concentrations of 0.05 to 0.2 and 0.3 to 0.5 mg kg −1 respectively, for which pasture is the predominant source in many grazing systems (Suttle, 2005; Flachowsky, 2007; Grace and Knowles, 2012). The prevalence of I deficiency is due to low concentrations in inland soils, low soil bioavailability, and nonessentiality for terrestrial plants (Fuge, 1996; Zimmermann, 2009; Medrano‐Macías et al, 2016).…”

mentioning

confidence: 99%

“…and clover ( Trifolium spp.) (Suttle, 2005). These are predominantly organic glucosinolates (Hurrell, 1997).…”

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confidence: 99%

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Environmental Parameters Affecting the Concentration of Iodine in New Zealand Pasture

et al. 2019

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Iodine (I) is an essential trace element commonly deficient in agricultural systems. Whereas there is much information on I in food crops, there is a lacuna of knowledge on the environmental factors that affect pasture I concentrations. We aimed to identify the most important environmental factors affecting the concentration of I in New Zealand pastures, and the consequences to agricultural systems. Soil and pastoral samples were collected throughout the country and analyzed for I and other elements. The soils contained 1.1 to 86 mg I kg−1, with 0.005 to 1.4 mg kg−1 in the pasture. In 26% of pastures, I concentrations were insufficient for sheep nutrition, whereas 87% contained insufficient I for cattle nutrition. Pasture I concentrations were negatively correlated with the distance from the sea, and the concentration of oxalate‐extractable amorphous Al, Fe, and Si oxides, which immobilize soil I. Soil organic C and clay increased I retention in soil but did not significantly affect pasture I concentrations. Future work should investigate how soil properties affect pasture I uptake in inland areas. Core Ideas 87% of New Zealand pastures contained insufficient iodine for cattle. Pasture I levels are higher close to the sea. Pasture I levels are lower in soil that is high in Fe and Al (oxyhydr)oxides.

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Micronutrient Imbalance

and¹,

Jones²

2007

Diseases of Sheep

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Assessing the needs of sheep for trace elements

Cited by 12 publications

References 14 publications

Macromineral and trace element supply in sheep and goats in Austria

Macromineral and trace element supply in sheep and goats in Austria

Environmental Parameters Affecting the Concentration of Iodine in New Zealand Pasture

Micronutrient Imbalance

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