Your search for keyword(s) "defoliation intensity" resulted in 8 record(s).

Title: Defoliation effects on herbage production and root growth of wet meadow forage species: Journal: Rangeland Ecology & Management; Authors: J. D. Volesky, W. H. Schacht, A. E. Koehler, E. Blankenship, and P. E. Reece; Date: 2011; Summary: The effects of defoliation intensity and frequency on aboveground production and root production of three species (slender wheatgrass, Nebraska sedge and \'Steadfast\' birdsfoot trefoil) were examined in highly controlled field study at the Gudmundsen Sandhills Laboratory (42Â° 04' N; 101Â° 26' W) 11 km north of Whitman, Nebraska. Forty-eight 48 containers of each species were transplanted in containers one meter apart in a 6 X 8 grid. One of six defoliation treatments (control, 2 clippings/low-intensity, 2 clippings/high-intensity, 5 clippings/low-intensity, 5 clippings/ ...; Agrovoc Control Words: Riparian zones, Rangeland, Defoliation; View more details about this article

Title: Defoliation impacts on Festuca campestris (Rydb.) plants exposed to wildfire: Journal: Journal of Range Management; Authors: A. D. Bogen, E. W. Bork, and W. D. Willms; Date: 2003; Summary: According to Bogen et al., grazing of foothills rough fescue (Festuca campestris) plants, that have been recently burned by wildfire, may be detrimental to the future reproduction and growth of those plants, depending on the time of year that defoliation takes place, not the grazing intensity. In the first growing season after burning, burned plants were smaller and produced less tillers and seedheads than non-burned plants. Burned plants clipped in July produced fewer tillers than plants clipped in May or September. The second growing season after burning, and one seas ...; Agrovoc Control Words: Riparian zones, Rangelands, Wildlife; View more details about this article

Title: How herbivory affects grazing tolerant and sensitive grasses in a central Texas grassland: Integrating plant response across hierarchical levels: Journal: Oikos; Authors: J. R. Brown, and J. W. Stuth; Date: 1993; Summary: Brown and Stuth compared tiller regrowth in Schizachyrium scoparium and Paspalum plicatulum at light, moderate, heavy and extreme levels of defoliation, over 4 years in a Texas grassland. Schizachyrium scoparium was able to compensate for lost leaf tissue during the course of the grazing season, while Paspalum was not. The Schizachyrium community declined due to preferred selection by cattle under light and heavy grazing. Schizachyrium tiller recruitment declined by 50% under grazing, while Paspalum tiller recruitment remained similar, with or without grazing; suggesting that repeat herbivo ...; Agrovoc Control Words: Riparian zones, Rangelands, Wildlife; View more details about this article

Title: Maximization of aboveground grassland production: The role of defoliation frequency, intensity, and history: Journal: Ecological Applications; Authors: C. L. Turner, T. R. Seastedt, and M. I. Dyer; Date: 1993; Summary: Turner et al. hypothesized that overcompensation most likely occurs in previously ungrazed tallgrass prairie as a result of stored photosynthate. In a 3-year experiment, the authors found that defoliation history largely controlled whether or not defoliated plants overcompensated for tissue removal. Plants on chronically grazed sites only compensated for foliage removed by grazers. They found that production on plots mowed 1-year prior was similar to sites that had been grazed long-term. Without prior mowing, however, aboveground production was 13-61% higher. On long-term grazed sites, pr ...; Agrovoc Control Words: Riparian zones, Rangelands, Wildlife; View more details about this article

Title: Clipping frequency and intensity effects on big bluestem yield, quality, and persistence: Journal: Journal of Range Management; Authors: J. R. Forwood, and M. M. Magai; Date: 1992; Summary: The forage production and quality of 'Kaw' big bluestem (Andropogon gerardii) differed depending on the frequency and intensity of repeated clipping in a 2-year Missouri field trial. Leaf crude protein declined with increasing regrowth periods and stem in vitro dry matter digestibility was unaffected by treatment, suggesting that leaf maturity has considerable affect on plant quality. Repeated clipping to 10-cm reduced total nonstructural carbohydrates significantly more than clipping to 20-cm, and stand improvement was observed in the higher stubble height plants. The ...; Agrovoc Control Words: Riparian zones, Rangelands, Wildlife; View more details about this article

Title: Effects of simulated herbivory on growth and reproduction of two beach annuals, Cakile edentula and Corispermum hyssopifolium: Journal: Canadian Journal of Botany; Authors: K. E. Gedge, and M. A. Maun; Date: 1992; Summary: Four experiments (two field, two greenhouse) were conducted at The University of Western Ontario and at Lake Huron [Pinery Provincial Park (43Â° 15â€™ N, 81Â° 50â€™ W), Port Franks (43Â° 15â€™ N, 81Â° 51â€™ W)]to examine how Cakile edentula var. lucustris (sea rocket) and Corispermum hyssopifolium (bugseed) responded to simulated and natural defoliation. Field trial one, wild plants were monitored for actual level of herbivory from June through July a ...; Agrovoc Control Words: Riparian zones, Grazing, Wildlife; View more details about this article

Title: Tiller defoliation patterns under short duration grazing in tallgrass prairie: Journal: Journal of Range Management; Authors: R. L. Gillen, F. T. McCollum, and J. E. Brummer; Date: 1990; Summary: Gillen et al. examined the impact of 3 short-duration grazing treatments (2, 3, and 4-grazing cycles, ranging from 3 to 9 days) and 2 stocking rates on Oklahoma tallgrass prairie over 2 years. Grass height was reduced by an average of 55% per grazing period under all treatments, except heavier stocking under the 2-cycle treatment which had the longest grazing period. Big bluestem (Andropogon gerardii) was preferred under all treatments, and was defoliated to a greater degree as grazing periods lengthened. On average, the percent of big bluestem and little bluestem (< ...; Agrovoc Control Words: Riparian zones, Rangelands, Wildlife; View more details about this article

Title: Effects of herbivory on twig dynamics of a Sonoran desert shrub Simmondsia chinensis (Link) Schn: Journal: Journal of Applied Ecology; Authors: B. A. Roundy, and G. B. Ruyle; Date: 1989; Summary: The authors of this study compared the vegetative and reproductive growth of moderately and heavily grazed jojoba (Simmondsia chinensis) plants to jojoba plants that had been rested from grazing for 7 years inside livestock exclosures. The density of jojoba plants was similar inside and outside of exclosures, however, grazed plants were shorter, had less canopy cover, and produced less flowers than ungrazed plants. Moderate grazing enhanced twig growth and heavy grazing decreased twig growth, however, plants exposed to both grazing levels were able to compensate for vege ...; Agrovoc Control Words: Riparian zones, Rangelands, Wildlife; View more details about this article