Your search for keyword(s) "fertilization" resulted in 9 record(s).

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Title: Litter mass, deposition rate, and chemical composition in bahiagrass pastures managed at different intensities: Journal: Crop Science; Authors: J. C. B. Dubeux, L. E. Sollenberger, S. M. Interrante, J. M. B. Vendramini, and R. L. Stewart; Date: 2006; Summary: Authors evaluate the effects of management intensity, defined in terms of N fertilization and stocking rate, on litter mass, deposition rate, and chemical composition in continuously stocked 'Pensacola' bahiagrass (Paspalum notatum) pastures in Florida. Treatments were three management treatments: low, moderate, and high. Greater management intensity resulted in less litter mass on the pasture early in the growing season and more litter mass later in the season. Rate of litter decomposition was generally greatest for high treatment. Increasing management intensity from low to high resulted ...; Agrovoc Control Words: Riparian zones, Rangelands, Wildlife; View more details about this article

Title: Grazing management and nitrogen fertilization effects on vaseygrass persistence in limpograss pastures: Journal: Crop Science; Authors: Y. C. Newman, and L. E. Sollenberger; Date: 2005; Summary: Effects of grazing management and N fertilization on the persistence of vaseygrass (Paspalum urvillei), a weedy species in limpograss (Hemarthria altissima) pastures were examined at the Beef Research Unit at the University of Florida Gainesville (29° 38\' N; 82° 22\'W). Six treatments combinations of grazing regimes (continuous or rotational), stubble height (15 cm or 30 cm) and fertilizer application rates (50 or 150 kg N ha^-1) were applied to 16 plots in a split-plot design. Treatment effects were measured on ...; Agrovoc Control Words: Weeds, Fertilizer application, Grazing; View more details about this article

Title: Effects of management on species dynamics of Canadian aspen parkland pastures: Journal: Journal of Range Management; Authors: J. Waddington, D. H. McCartney, and L. P. Lefkovitch; Date: 1999; Summary: Aspen parkland vegetation response to continuous and rotational grazing combined with fertilizing and seeding were determined in this study. Vegetative cover was greater on the continuously grazed pastures than rotationally grazed pastures. Pastures managed with four-field rotational grazing had greater cover than pastures managed with six-field rotational grazing. Changes in species composition occurred in all pastures, regardless of grazing system or fertilizer and seeding treatments applied. However, overgrazing caused increases of less desirable species in the continuously grazed pastu ...; Agrovoc Control Words: Riparian zones, Rangelands, Wildlife; View more details about this article

Title: Herbivore effects on plant species density at varying productivity levels: Journal: Ecology; Authors: L. Gough, and J. B. Grace; Date: 1998; Summary: In this study, Gough and Grace studied plant community responses to fertilization and herbivory in Louisiana brackish and freshwater marshes. Species density was greater in plots that were grazed because grazing pressure limited the ability of dominant plants to outcompete other plants and reduce plant community diversity. Biomass was greatest in plots that were fertilized, suggesting that plant growth is limited by the nutrient availability in these marshes. These results indicate that grazing can enhance productivity and species diversity of brackish and freshwater marshes in Louisiana wh ...; Agrovoc Control Words: Riparian zones, Rangelands, Wildlife; View more details about this article

Title: Reversal of grazing impact on plant species richness in nutrient-poor vs. nutrient-rich ecosystems: Journal: Ecology; Authors: M. Proulx, and A. Mazumder; Date: 1998; Summary: To test the hypothesis that the impacts of grazers on plant species richness reverse under contrasting nutrient richness, Proulx and Mazumder analyzed unpublished and published data from lake, stream, marine, grassland, and forest ecosystems. They analyzed data from 30 studies providing 44 comparisons of plant species richness under low vs. heavy grazing pressure in enriched or nutrient-rich and non-enriched or nutrient-poor ecosystems. Based on all of their comparisons, plant species richness decreases with high grazing in nutrient-poor ecosystems, while it increases with high grazing in nu ...; Agrovoc Control Words: Riparian zones, Rangelands, Wildlife; View more details about this article

Title: Growth responses of Carex ramenskii to defoliation, salinity, and nitrogen availability: Implications for geese-ecosystem dynamics in western Alaska: Journal: Ecoscience; Authors: R. W. Ruess, D. D. Uliassi, C. P. H. Mulder, and B. T. Person; Date: 1997; Summary: The authors observed the effects of clipping and fertilizing on the growth of Carex ramenskii, both in the field and in the greenhouse. In the first year, fertilized plots showed higher peak season biomass, off-take biomass, and aboveground net primary productivity (AGNPP). Clipping did not significantly affect peak season biomass, however, off-take biomass and AGNPP were significantly higher in the clipped plots. Similar results from fertilization was seen in the second year, but clipping significantly decreased peak season biomass. Fertilization increased plant N con ...; Agrovoc Control Words: Riparian zones, Rangelands, Wildlife; View more details about this article

Title: Nitrogen fertilization stimulates herbivory by snowshoe hares in the boreal forest: Journal: Canadian Journal of Zoology; Authors: V. O. Nams, N. F. G. Folkard, and J. N. M. Smith; Date: 1996; Summary: In the Yukon, a study of snowshoe hares, Lepus americanus, showed that they produced more pellets on plots with more fertilizer, than on plots with less fertilizer. Snowshoe hares also produced more pellets near plots with more fertilizer than near plots with less fertilizer. Also, fertilization increased the ratio of time spent on plots to time spent off of the plots. From the results, one could conclude that the change in pellet density reflects a change in hare movement rather than in defecation rate. Thus, the authors concluded that hares concentrated their activit ...; Agrovoc Control Words: Riparian zones, Rangelands, Wildlife; View more details about this article

Title: Mowing and fertilization effect on productivity and spectral reflectance in Bromus inermis plots: Journal: Ecological Applications; Authors: M. I. Dyer, C. L. Turner, and T. R. Seastedt; Date: 1991; Summary: Vegetation measurements were used to determine the effects of three intensities of simulated grazing and fertilizer use on plant production. These measurements were then used to assess the use of remote sensing techniques for landscape scale vegetation measurements in a field consisting primarily of Bromus inermis, a cool-season grass. Mowing to 5 or 10-cm increased biomass production compared to control. 20-cm mowed plots and average biomass production was 67% greater on fertilized plots, with and without mowing, than unfertilized plots. Effects of mowing were most obvious in mid-season w ...; Agrovoc Control Words: Riparian zones, Rangelands, Wildlife; View more details about this article

Title: Factors limiting seasonal growth and peak biomass accumulation in Eriophorum vaginatum in Alaskan tussock tundra: Journal: Journal of Ecology; Authors: G. R. Shaver, F. Chapin III, and B. L. Gartner; Date: 1986; Summary: Clipped and unclipped plants were exposed to various light, temperature, and fertilizer treatments to determine the factor limiting the growth of Eriophorum vaginatum in an Alaskan tundra. Varying light and temperature levels did not affect plant growth, however, fertilizers greatly enhanced plant growth and nitrogen was determined to be the nutrient that was limiting growth of E. vaginatum plants in this area. Clipping reduced root biomass, individual tiller weight, and end of season total biomass, however, clipping increased N and P concentrations ...; Agrovoc Control Words: Riparian zones, Rangelands, Wildlife; View more details about this article

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