Interrelationship of Dietary Molybdenum and Copper on Growth and Tissue Composition of Cattle

Clawson, W.J.; Lesperance, A. L.; Bohman, V. R.; Layhee, D. C.

doi:10.2527/jas1972.343516x

Cited by 25 publications

(8 citation statements)

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“…Each of these components in the equation has certain assumptions. Also, two studies involving cattle yielded estimates of 1.8 and 0.8 μg/kg BW, respectively [ 21 , 22 ]. The CSIRO system [ 16 ] adopted 4.0 μg/kg BW as the net Cu requirement for maintenance based on a study developed by Suttle [ 23 ].…”

Section: Resultsmentioning

confidence: 99%

Macrominerals and Trace Element Requirements for Beef Cattle

et al. 2015

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Eighty-seven Nellore animals were utilized in this study to estimate net requirements for the maintenance and growth of beef cattle as well as the retention coefficients of 13 minerals: macrominerals (Ca, P, Mg, K, Na, and S) and trace elements (Cu, Fe, Mn, Se, Zn, Co, and Cr). The net requirements for maintenance and the true retention coefficient were estimated by using the regression between apparent retention and intake for each mineral. The net requirement for maintenance (μg/kg BW) and retention coefficients (%) were 163 and 85 for Cu, 2,097 and 53 for Fe, 32.3 and 24 for Mn, 3.72 and 48 for Se, 669 and 0.80 for Zn, 18.4 and 86 for Co, and 22.9 and 78 for Cr. The dietary requirements of macrominerals (g/kg DMI) were 5.12 for Ca, 2.38 for P, 0.96 for Mg, 2.40 for K, 0.79 for Na, and 1.47 for S. This is the first study using Nellore cattle to estimate mineral requirements; considering that Nellore cattle are the most common breed in Brazil and that Brazil is a major beef producer globally, this knowledge can help producers to improve animal performance by supplying the correct amount of minerals.

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Section: Resultsmentioning

confidence: 99%

Macrominerals and Trace Element Requirements for Beef Cattle

et al. 2015

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“…Copper intake is the primary interaction factor in Mo toxicity because sufficient Cu supplementation can counteract almost all disorders associated with high Mo intakes (Clawson et al, 1972). Ward (1994) identified dietary factors clearly related to Mo‐induced hypocuprosis as Cu intake, Cu availability, S intake, Fe intake, and the physical form of the feed.…”

Section: Molybdenum Toxicitymentioning

confidence: 99%

A Modified Risk Assessment to Establish Molybdenum Standards for Land Application of Biosolids

O’Connor

Brobst²,

Chaney³

et al. 2001

J of Env Quality

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The USEPA standards (40 CFR Part 503) for the use or disposal of sewage sludge (biosolids) derived risk-based numerical values for Mo for the biosolids --> land --> plant --> animal pathway (Pathway 6). Following legal challenge, most Mo numerical standards were withdrawn, pending additional field-generated data using modern biosolids (Mo concentrations <75 mg kg(-1) and a reassessment of this pathway. This paper presents a reevaluation of biosolids Mo data, refinement of the risk assessment algorithms, and a reassessment of Mo-induced hypocuprosis from land application of biosolids. Forage Mo uptake coefficients (UC) are derived from field studies, many of which used modern biosolids applied to numerous soil types, with varying soil pH values, and supporting various crops. Typical cattle diet scenarios are used to calculate a diet-weighted UC value that realistically represents forage Mo exposure to cattle. Recent biosolids use data are employed to estimate the fraction of animal forage (FC) likely to be affected by biosolids applications nationally. Field data are used to estimate long-term Mo leaching and a leaching correction factor (LC) is used to adjust cumulative biosolids application limits. The modified UC and new FC and LC factors are used in a new algorithm to calculate biosolids Mo Pathway 6 risk. The resulting numerical standards for Mo are cumulative limit (RPc)=40 kg Mo ha(-1), and alternate pollutant limit (APL) = 40 mg Mo kg(-1) We regard the modifications to algorithms and parameters and calculations as conservative, and believe that the risk of Mo-induced hypocuprosis from biosolids Mo is small. Providing adequate Cu mineral supplements, standard procedure in proper herd management, would augment the conservatism of the new risk assessment.

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“…is a copper-deficiency disease which occurs particularly in cattle and sheep and which is caused by the depressing effect of molybdenum (MO) on the physiological availability of copper (Cu) (Dye and O'Harra 1959;Clawson et al 1972;Case 1974). Characteristic symptoms in cattle are scouring, weight loss, depigmentation, reproductive impairment, and even death.…”

Section: Molybdenosismentioning

confidence: 99%

Molybdenosis: A Potential Problem in Ruminants Grazing on Coal Mine Spoils

Erdman¹,

Ebens²,

Case³

1978

Journal of Range Management

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Highlight: Copper-to-molybdenum ratios in all but two sweetclover samples collected on spoil at eight coal mines in the Northern Great Piains ranged from 0.449 to 51. Ratios of 51 or less in forage are reported to cause moiybdenosis, a nutritional disease occurring in molybdic regions of the world. Therefore, if the major forage on coalmine spoils is sweetclover or other species with similar Cu:Mo ratios, molybdenosis may be expected to occur in cattle and sheep grazing in these areas.

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Interrelationship of Dietary Molybdenum and Copper on Growth and Tissue Composition of Cattle

Cited by 25 publications

References 0 publications

Macrominerals and Trace Element Requirements for Beef Cattle

Macrominerals and Trace Element Requirements for Beef Cattle

A Modified Risk Assessment to Establish Molybdenum Standards for Land Application of Biosolids

Molybdenosis: A Potential Problem in Ruminants Grazing on Coal Mine Spoils

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