Copper, Molybdenum, Zinc and Sulphur in Norwegian Forages and their Possible Role in Chronic Copper Poisoning in Sheep

Fr⊘slie, Arne; Norheim, Gunnar

doi:10.1080/00015128309435355

Cited by 15 publications

(7 citation statements)

References 8 publications

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“…With regard to the needs of ruminants, there has been concern about the rather low Co content in roughage harvested in several regions in Norway, and the Mo content has also been variable in some investigations, and suboptimal at some sites (Frøslie & Norheim, 1983;Synnes & Øpstad, 1995;Johansen et al, 2003). In this context, whether the supply of these elements is sufficient for optimal functioning of the Rhizobium -clover symbiosis has never been addressed.…”

Section: Introductionmentioning

confidence: 96%

Nitrogen fixation by red clover as related to the supply of Cobalt and Molybdenum from some Norwegian soils

Bakken¹,

Synnes²,

Hansen

2004

Acta Agriculturae Scandinavica, Section B - Soil & Plant Sc

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Section: Introductionmentioning

confidence: 96%

Nitrogen fixation by red clover as related to the supply of Cobalt and Molybdenum from some Norwegian soils

Bakken¹,

Synnes²,

Hansen

2004

Acta Agriculturae Scandinavica, Section B - Soil & Plant Sc

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“…A Cu:Mo ratio below six in more than 85% of the reference forages in our studies is in agreement with earlier works. However, both our and the previous studies of Frøslie and Nordheim (1983), Synnes and Øpstad (1995) and Rivedal et al (2003) have shown that due to extremely low concentrations of Mo, the Cu:Mo ratio might be above the recommended interval at some locations, even in coastal areas. Moreover, the ratio does not allow the antagonistic influence of other elements, such as sulphur and iron, but the Cu:Mo ratios become less important as the sulphur content of the diet increases (Underwood & Suttle, 1999).…”

Section: Cobaltmentioning

confidence: 55%

“…In Northern Scandinavia, timothy and meadow fescue are the most important forage crops and there has been concern about the concentrations of Co as well as the Cu:Mo ratio in silage and hay in several regions. Occasionally, deficiency of Co and/or Cu has been reported in cattle and sheep herds in coastal areas of Norway (Frøslie & Nordheim, 1983;Ulvund, 1995;Sivertsen & Plassen, 2004) and in Sweden (Anonymous, 2007). In contrast, Cu poisoning of sheep has been reported in some inland areas (Frøslie & Nordheim, 1983;.…”

Section: Introductionmentioning

confidence: 96%

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Is it possible to counterbalance deficiencies or imbalances in cobalt, copper and/or molybdenum in forage based diets by including more and other plants?

Johansen

Bakken

Synnes³

2009

Acta Agriculturae Scandinavica, Section A - Animal Science

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To investigate whether species other than perennial grasses may contribute to a more balanced trace element supply for livestock, three studies have been conducted in coastal areas of Norway. From two series of field trial samples of green fodder crops were collected. Fodder vetch, broad beans and lupin may improve the supply of Co but do not solve severe deficiencies. None of the investigated species appeared to have the potential to counterbalance severe deficiencies in Cu and/ or Mo. In a third study, samples of common dicotyledonous forbs and leaves from trees were collected from semi-natural pastures. Rumex species and tree leaves were high in Co (0.39Á1.1 mg Co kg DM (1 ) and may be good sources for Co to grazing animals. Ranunculus repens was relatively high in Cu (10Á13 mg kg DM (1 ) whereas the Cu:Mo ratio was not consistently high. Tree leaves on the other hand, would counterbalance a low Cu:Mo ratio.

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“…A survey of hepatic copper levels in sheep in Norway was done in 1975 [2,3]. Hepatic copper accumulation in sheep in Norway is primarily influenced by molybdenum levels in pasture and roughage [4]. Soil acidity and other factors governing the uptake of molybdenum in plants may be influenced by anthropogenic changes in the environment [1].…”

Section: Introductionmentioning

confidence: 99%

Hepatic Cobalt and Copper Levels in Lambs in Norway

Sivertsen

Plassen

2004

Acta Vet Scand

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Sivertsen T, Plassen C: Hepatic cobalt and copper levels in lambs in Norway. Acta vet. scand. 2004, 45, 69-77. -Cobalt and copper concentrations were measured in 599 lamb livers collected at slaughter from 58 sheep flocks in 6 different parts of Norway in 1993. Information about pasture, additional feeding and mineral supplements in the flocks was obtained through a questionnaire. Average hepatic levels of cobalt in the lamb flocks varied from <0.003 to 0.22 µg/g ww, and of copper from 5 to 240 µg/g ww. Flocks with deficient or marginal cobalt status were found in all parts of southern Norway, but primarily in the west and south-west. Some flocks with marginal copper status were found in the south-west, while flocks with signs of excessive hepatic copper concentrations were found mainly in inner parts of central and northern Norway. Hepatic copper concentrations were significantly higher in lambs that had grazed mountain pastures than in those that had grazed lowland pastures in the summer.

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Copper, Molybdenum, Zinc and Sulphur in Norwegian Forages and their Possible Role in Chronic Copper Poisoning in Sheep

Cited by 15 publications

References 8 publications

Nitrogen fixation by red clover as related to the supply of Cobalt and Molybdenum from some Norwegian soils

Nitrogen fixation by red clover as related to the supply of Cobalt and Molybdenum from some Norwegian soils

Is it possible to counterbalance deficiencies or imbalances in cobalt, copper and/or molybdenum in forage based diets by including more and other plants?

Hepatic Cobalt and Copper Levels in Lambs in Norway

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