scholarly journals Trace Element Nutrition, Selenium

2020 ◽  
Author(s):  
Keyword(s):  
Trace Element ◽  
Trace Element Nutrition

Trace element nutrition status and dietary intake of children with phenylketonuria

1990 ◽  
Vol 52 (1) ◽  
pp. 159-165 ◽  
Author(s):  
C Reilly ◽  
J E Barrett ◽  
C M Patterson ◽  
U Tinggi ◽  
S L Latham ◽  
...  
Keyword(s):  
Dietary Intake ◽  
Trace Element ◽  
Nutrition Status ◽  
Trace Element Nutrition

Current issues in trace element nutrition of grazing livestock in Australia and New Zealand

1999 ◽  
Vol 50 (8) ◽  
pp. 1341 ◽  
Author(s):  
D. G. Masters ◽  
G. J. Judson ◽  
C. L. White ◽  
J. Lee ◽  
N. D. Grace
Keyword(s):  
Trace Elements ◽  
New Zealand ◽  
Trace Element ◽  
Recent Work ◽  
Cost Effective ◽  
Trace Element Composition ◽  
Scientific Data ◽  
Pastoral System ◽  
Trace Element Nutrition ◽  
Grazing Livestock

Improving trace element nutrition of grazing animals, in a way that is cost effective and that meets consumer perceptions and preferences, is a continuing challenge. This review focuses on research over the past 10 years, addressing issues and perspectives on the roles, risks of inadequacy, and supplementary remedies of key trace elements, both essential and deleterious, which have an impact on the productivity and product quality of grazing livestock throughout Australia and New Zealand. The emphasis is on copper (Cu), cobalt (Co), iodine (I), selenium (Se), and, to a lesser extent, zinc (Zn) — the trace elements most frequently found to be deficient in parts of Australia and New Zealand. Research continues to elucidate new roles for trace elements in the animal, and as this leads to a better understanding of requirements, diagnostic criteria and supplementation strategies need re-evaluation. Newer perspectives on marginal deficiency for Cu, I, Se, and Zn are given and issues for risk management discussed. Advances in sustained delivery of trace elements such as Co (as vitamin B12), I, and Se are reported. The diagnosis and management of marginal Cu deficiency continue to be difficult, especially in New Zealand where recent work has shown that dietary antagonists [iron (Fe), molybdenum (Mo), and sulfur (S)] may impair Cu absorption at lower intakes than previously thought. There is still a dearth of scientific data on the advantages of using so-called organic trace element supplements (metals complexed or chelated with amino acids or peptides). Nevertheless their usage continues to increase. There is increasing evidence that trace elements influence the pathophysiology arising from the ingestion of toxins. This review summarises recent work on the role of Co in annual ryegrass toxicity; Cu, Se, and Zn in lupinosis; Cu and alkaloid toxicity; Zn and facial eczema; and Co and white liver disease. Trace elements are required to support immune function (e.g. as imposed parasite infection) and marginal deficiencies may be exacerbated by an immunological challenge. The roles of Cu, Co, Mo, Se, and, to a lesser extent, chromium and Zn have attracted attention and under conditions of stress there may be an additional need for these elements. Diversification in farming has led to the introduction of species such as deer (Cervus), alpacas (Camilids), emus, and ostriches (Ratites) and the paucity of information on trace element requirements for these species, and also for horses, indicates the need for further work. The effect of supplementation on trace element composition of meat, milk, and wool is also reviewed, both in terms of product characteristics and human health. Of the deleterious elements, cadmium has attracted the most interest and concern because of its introduction into the pastoral system from phosphate-based fertilisers.

scholarly journals Trace element nutrition in the tropical zebu cattle type. Lessons from the Gilgel Gibe catchment, Ethiopia

Afrika Focus ◽  
2014 ◽  
Vol 27 (1) ◽  
Author(s):  
Veronique Dermauw
Keyword(s):  
Trace Elements ◽  
Trace Element ◽  
Bos Indicus ◽  
Zebu Cattle ◽  
Health Production ◽  
Animal Products ◽  
Trace Element Status ◽  
Trace Element Nutrition ◽  
The Tropics ◽  
The Impact

In the tropics, cattle are majorly dependent on natural pastures growing on poor soils and as a result prone to trace element deficiencies. This work investigated several aspects of trace element nutrition in zebu (Bos indicus) cattle, the most widely used cattle type in the tropics. Through several trials conducted at the Gilgel Gibe catchment, Ethiopia, we aimed to study factors influencing the flow of trace elements from soil to plant and grazing zebu cattle, and to investigate the impact of trace element status on health, production and trace elements in animal products. Overall, trace element, e.g., Cu, deficiencies were widely prevalent. Environment and certain grazing strategies were intimately related and affected trace element supply whereas cattle type affected trace element status. The effect of trace element status on trace elements in animal products was obvious, whereas the impact on health and production was less clear-cut. Key words: trace elements, minerals, cattle, zebu, Bos indicus, Ethiopia, tropics 

Trace element nutrition of grazing ruminants. 2. Hepatic copper storage in young and adult sheep and cattle given varying quantities of oxidized copper particles and other copper supplements

1986 ◽  
Vol 37 (2) ◽  
pp. 189 ◽  
Author(s):  
JP Langlands ◽  
JE Bowles ◽  
GE Donald ◽  
AJ Smith
Keyword(s):  
Trace Element ◽  
Post Partum ◽  
Precautionary Measure ◽  
Merino Sheep ◽  
Copper Particles ◽  
Hepatic Copper ◽  
Soluble Glass ◽  
Hereford Cattle ◽  
Trace Element Nutrition ◽  
Copper Storage

Hepatic copper (Cu) storage was determined by biopsy after oxidized Cu wire was given to sucking lambs at 0-43 days of age, and to weaned Merino sheep and Hereford cattle varying in age. Cu-calcium edetate (Cu-EDTA) and soluble glass pellets were also evaluated as Cu supplements. A dose of 45 mg oxidized particles/kg liveweight was predicted to induce a mean maximum response of 84 and 179 mg Cu/kg DM in hepatic concentrations in weaned Merino sheep and Hereford cattle at 49 and 100 days from dosing respectively; these responses should not result in unacceptable hepatic concentrations in cattle, or in sheep of low Cu status, but the response is variable, and supplementation as a precautionary measure without prior indications of Cu insufficiency is not desirable. The particles were effective when given to lambs from birth, but did not increase hepatic Cu concentrations in lambs when ewes were dosed post partum. A dose of 1 g particles/lamb was as effective as a 2 g dose in increasing hepatic Cu concentration, and lambs given 2 g were lighter than those given 1 g; the dose increased hepatic Cu concentrations for at least 292 days. Cu-EDTA was given subcutaneously at the rate of 50 mg Cu for sheep and 150 mg Cu for cattle, and was as effective in increasing hepatic Cu concentration as 45 mg oxidized particle/kg liveweight; it did not produce the severe reactions frequently reported in the literature. The soluble glass pellet was less effective, but studies with a later prototype suggest that subsequent formulations may be more satisfactory.

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