An Artificial Rumen System for Range Nutrition Studies

Dyne, George M. Van

doi:10.2307/3895110

Cited by 6 publications

(1 citation statement)

References 5 publications

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“…In order to equate micro-and macrodigestion, one or more standard forage samples should be included in each microdigestion trial (Van Dyne, 1963a;Tilley and Terry, 1963). This permits adjustment of microdigestion estimates of range forages in terms of the standard: This ratio is then multiplied by the microdigestion value for the standard sample when it was digested by inocula from animals fed the standard forage on dry-lot:…”

Section: Methodsmentioning

confidence: 99%

Gaseous Nitrogen Losses and Range Fertilization

Dyne¹,

Meyer²

1964

Journal of Range Management

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Knowledge of quantitative forage intake by grazing animals is basic to range management. Forage intake is measured only with difficulty, and few data are available. Two recent monographs (Agricultural Board, 1962; Joint Committee, 1962) discuss measurement of digestibility of range forage, fecal output, and utilization (i.e., disappearance) of herbage. Measurement of range forage intake requires, however, a concomitant evaluation of forage digestibility and fecal output. Range herbage disappearance may be proportional to, but is greater than forage consumption by livestock because of herbage losses such as those due to weathering and trampling, and forage consumption by insects and rodents. A review of textbooks on range management, animal nutrition, and animal production reveals only one which gives estimates of quantitative forage intake by range livestock. Stoddart and Smith (1955) quote figures of daily range forage intake by cattle, but give no data on intake by sheep. This article presents a new technique of determining forage intake based on in vitro or in 1 Acknowledgment is expressed to H. F. Heady, G. P. Lojgreen, and W. C. Weir for their interest and suggestions in this work, which was supported in part by Regional Research Project W-34-Range Livestock Nutrition. Computational time was supported in part by N.I.H.

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Section: Methodsmentioning

confidence: 99%

Gaseous Nitrogen Losses and Range Fertilization

Dyne¹,

Meyer²

1964

Journal of Range Management

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Comparison of microdigestion techniques under range and drylot conditions

Dyne

Weir

1966

J. Agric. Sci.

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The nutritive evaluation of range forages often is limited by the size of the forage sample available, by the difficulty of determining both the quantity and quality of the forage eaten, and by the labour and other costs of making total faecal collections in digestion trials under range conditions. Microdigestion techniques utilizing either the nylon bag in the rumen (hereafter referred to as nylon bag in vivo) and artificial rumen techniques (hereafter referred to as in vitro) have been reviewed by Annison & Lewis (1959), Barnett & Reid (1961), and Johnson (1963). Forage evaluation could be greatly simplified if such microdigestion techniques could be utilized under range conditions. Following preliminary studies (Van Dyne, 1962), the research reported in this paper was undertaken to evaluate these techniques under both range drylot conditions in studying the intake and digestion of forages. Other aspects of these trials are reported elsewhere (Van Dyne & Weir, 1964; Van Dyne & Meyer, 1964; Van Dyne & Lofgreen, 1964; Van Dyne & Heady, 1965a, b).

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Forage Digestibility and Diet of Deer on Southern Upland Range

Short¹

1971

The Journal of Wildlife Management

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An Artificial Rumen System for Range Nutrition Studies

Cited by 6 publications

References 5 publications

Gaseous Nitrogen Losses and Range Fertilization

Gaseous Nitrogen Losses and Range Fertilization

Comparison of microdigestion techniques under range and drylot conditions

Forage Digestibility and Diet of Deer on Southern Upland Range

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