Your search for keyword(s) "ryegrass" resulted in 7 record(s).

Title: Water quality implications of nitrate leaching from intensively grazed pasture swards in the northeast US: Journal: Agriculture, Ecosystems & Environment; Authors: W. L. Stout, S. L. Fales, L. D. Muller, R. R. Schnabel, and S. R. Weaver; Date: 1999; Summary: Nitrate leaching was measured on orchardgrass (Dactyls glomerata) or ryegrass (Lolium perrene) dairy farm pastures that were either fertilized with nitrogen or inter-seeded with alfalfa (Medicago sativa) or white clover (Trifolium repens). Nitrate leaching varied by year, forage species, and seeding/fertilizer treatment. Pastures with inter-seeded legumes had higher levels of nitrate leaching in the year with lower precipitation; whereas the opposite was true in the fertilized pasture since fertilizer applica ...; Agrovoc Control Words: Riparian zones, Rangelands, Wildlife; View more details about this article

Title: Annual ryegrass seed yield response to grazing during early stem elongation: Journal: Agronomy Journal; Authors: W. C. Young, III, D. O. Chilcote, and H. W. Youngberg; Date: 1996; Summary: Researchers in Oregon set out to determine the effects of four grazing durations by sheep in early stages of stem elongation on annual ryegrass (Lolium multiflorum) seed yield. Results of this experiment suggest that annual ryegrass may be grazed, up to the time when all primary tillers have had their apical meristems removed, without a deleterious effect on seed yield. Results also suggest that a short grazing period, such as G1 (grazing until 1/3 of primary tillers had their apical meristems removed), may actually increase seed yield. The primary effect of all grazing ...; Agrovoc Control Words: Riparian zones, Rangelands, Wildlife; View more details about this article

Title: Defoliation effects on seasonal production and growth rate of cool-season grasses: Journal: Agronomy Journal; Authors: D. P. Belesky, and J. M. Fedders; Date: 1994; Summary: This 3-year experiment in West Virginia was designed to determine the effects of repeated defoliation, based on canopy height, on the seasonal distribution of herbage mass and growth rates of cool-season grasses. The seasonal distribution of cool-season grass dry matter was influenced by defoliation regimes based on canopy height and intensity of removal (50 vs 75%). The grasses investigated had rapid and sustained increases in instantaneous growth rates when managed as hay in the early season, but when defoliated during the early season they had relatively low and constant instantaneous gro ...; Agrovoc Control Words: Riparian zones, Rangelands, Wildlife; View more details about this article

Title: Effect of timing and intensity of first defoliation on subsequent production of 4 pasture species: Journal: Journal of Range Management; Authors: A. J. Leyshon, and C. A. Campbell; Date: 1992; Summary: The appropriate initial grazing date and severity was determined for 3 seeded pasture grasses (Altai wild ryegrass (Leymus angustus), Russian wild ryegrass (Psathyrostachys junceus), crested wheatgrass (Agropyron desertorum)) and a pasture alfalfa (Medicago sativa), using simulated grazing and forage yield measurements. Initial clipping height affected subsequent forage yield more than timing of initial clipping, and the results suggested that moderate clipping, which may increase forage yield during the treatme ...; Agrovoc Control Words: Riparian zones, Rangelands, Wildlife; View more details about this article

Title: Responses of endophyte-bearing and endophyte-free varieties of Lolium perenne L. to fungicide treatment and simulated herbivory

Journal: Journal of Range Management

Authors: R. E. J. Boerner, A. J. Scherzer, and B. G. Sturgis

Date: 1990

Summary: Fungal endophytes, which naturally grow in some plant leaves and stems, can act as a defense against herbivory and may or may not be advantageous to plants, depending on their exposure to herbivores and the effects of the endophyte on plant growth. Boerner et al. compare the effects of moderate and severe simulated grazing among perennial ryegrass (Lolium perenne) plants, with and without fungal endophytes, and plants whose fungal endophytes had been removed with fungicide. Increasing the level of herbivory decreased shoot and root mass, and total plant yield of all plan ...

Agrovoc Control Words: Riparian zones, Rangelands, Wildlife

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Title: Defoliation frequency and intensity effects on pasture forage quality

Journal: Journal of Range Management

Authors: I. Motazedian, and S. H. Sharrow

Date: 1990

Summary: Different clipping intensities and intervals were applied to plots of mixed perennial ryegrass (Lolium perenne) and subclover (Trifolium subterraneum) in this study to determine the effects of different grazing management strategies on forage quantity and quality in improved pastures containing these species. Digestible dry matter yield increased with increasing defoliation interval. With the exception of forage digestibility (DMD) in 1980, both digestibility and crude protein content (CPC) of the forage produced decreased linearly as the period betw ...

Agrovoc Control Words: Riparian zones, Rangelands, Wildlife

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Title: Defoliation effects on dry matter production of a perennial ryegrass-subclover pasture

Journal: Agronomy Journal

Authors: I. Motazendian, and S. H. Sharrow

Date: 1986

Summary: This study was initiated in Oregon in 1980 to monitor the effects on forage production of simultaneously varying both defoliation frequency and defoliation intensity in a grass-clover (Lolium perenne-Trifolium subterraneum) pasture. Dry matter yield was directly related to defoliation interval. The relationship between dry matter yield and defoliation interval was generally a power curve with yield increasing rapidly as the period between defoliation events increased from 1-49 days. The erect-growing perennial ryegrass-dominated sward in 1980 had it ...

Agrovoc Control Words: Riparian zones, Rangelands, Wildlife

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