Global ETD Search
Search theses and dissertations gathered from participating repositories worldwide. Every result links back to the library that holds it. No account is needed.
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Showing 1 to 20 of 20 for “"grazing animals"”.
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Mathematical models of the physiological mechanisms affecting the adaptation of growing cattle during and after a period of undernutrition
[NOT OCR'D] Grazing animals in the semi-arid tropics are subjected to short or long periods of moderate to severe undernutrition. Many simulation models were developed to represent the mechanisms of ruminant adaptation. These mechanisms include, among others, the differential mobilization of …
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Effects of heat stress and fescue toxicosis on the immune system and other physiological parameters
… and is the most important cool season grass for grazing animals. Certain fungi also grow on these grasses which produce toxins, resulting in reduced feed intake (FI), body weight (BW) and a compromised thermoregulatory system when consumed by animals . Our first study showed that sensitizing rats …
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The Use of Native Hawaiian Plants by Landscape Architects in Hawaii
… native flora and fauna resulting from introduced grazing animals, invasive flora, fire and a loss of habitat due to urbanization and agricultural use. Scientists believe that protecting these plants can be achieved by eliminating or reducing threats to native ecosystems, generating and maintaining …
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The Use of Veld Restoration Techniques for Rehabilitating Degraded Waterberg Mountain Bushveld in Lapalala Wilderness Reserve, Limpopo Province
… newly emerging seedlings must be protected from grazing animals. The practice of brush-packing has proven effective for this purpose. Double layers of brush-packing create a favourable environment for seedling establishment and growth, offering longer protection than single layers. This …
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Sodium relations in pasture and fodder plants grown in New Zealand
… herbage sodium levels are below those needed for grazing animals. Moreover, as a direct result of the increased use of potassic fertilisers, particularly in the North Island, most pastures now have potassium levels well in excess of plant needs. Because potassium suppresses plant uptake of sodium …
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Grazing and Range Management - Alberta
Livestock grazing and range management have had major impacts on grassland vegetation in Alberta. Grazing animals have had impacts on plant communities in Alberta since before fur traders occupied the land. Over the years both livestock and wildlife have been studied and managed to try and ensure …
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Assessing the reliability of plant-wax markers to delineate diet choice and feed efficiency in beef heifers
Estimating feed efficiency in grazing environments is challenging due to difficulties in quantifying food intakes and diet choices in free-grazing animals. The plant-wax marker technique may be a useful tool to redress this problem. However, its reliability needs to be validated before its wider …
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The Effects of Phosphorus and Nitrogen Fertilization on Tall Fescue Nutrient Content, Yield and Baleage Quality
… be imbalanced and cause nutritional disorders in grazing animals. To improve the nutrition of tall fescue, it is known that fertilization of phosphorus (P) can help improve leaf nutrient content of P, magnesium (Mg), and calcium (Ca). Additionally, nitrogen (N) fertilization is known to improve …
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Evaluation of methodology for detection and quantification of coliform bacteria and their survival in soil and water.
… practices such as the spreading of slurry and grazing animals in the proximity of supplies all increase the risk of contamination. The presence of coliform bacteria and in particular E. coli, in private water supplies is an indication of the potential for the water supply to be contaminated …
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Effects of frequent burning on grass-grazer interactions in a mesic savanna
… rangelands to manipulate food availability for grazing animals. After fires, large areas of the landscape are quickly covered with nutritious new regrowth, which grazers move into and utilise as a food resource. The effect of this change in animal grazing patterns on the grass communities is not …
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Factors restricting recruitment of Ascophyllum nodosum L (Le Jolis)
… high in the zone where canopy is continuous and grazing animals few. Settlement could account for the restricted range if it were enhanced under canopy or on the upper shore. Settlement was monitored under canopy and in the open at four shore levels during spring 1983. Propagules settled …
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Precision Nutrition Tools to Support Extensive Forage-Based Livestock Systems
… to improve the health and performance of animals through individualized feeding and management. Several developments in precision nutrition exists for ration formulation, feedstuff analysis, and individualized feeding, particularly in intensive livestock systems. Although research in …
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Simple sequence repeat analysis and qualitative pathway analysis of Rathayibacter toxicus
… it produces a dangerous neurotoxin, tunicamycin. Grazing animals that consume toxic galls develop convulsions and staggers, often resulting in death. Rathayibacter toxicus is indigenous to Australia, but concern for global spread and potential impact to livestock industries resulted in its …
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Effects of Early Spring Growth Annual Ryegrass Pasture Consumption on Parameters Associated with Laminitis in Horses
Ten adult Quarter Horses (5 mares and 5 geldings) were placed in dry lot for 90 days and allowed free choice access to a diet consisting of average quality orchard grass hay, salt and water. The horses were then allowed free choice access to early-growth annual ryegrass pasture, salt and water for …
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Release and Transport of Bacteria and Nutrients from Livestock Manure Applied to Pastureland
… confined animal systems and by direct deposit by grazing animals are both major sources of fecal bacteria and nutrients in runoff. Therefore, an understanding of the overland transport mechanisms for fecal bacteria and nutrients is very important for the development of best management practices to …
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The ecology and utilization of dryland lucerne pastures on deep sands in the Upper South East of South Australia
A grazing experiment involving Merino wethers in several stocking rate (SR) and grazing method (GM) treatment combinations was undertaken on pastures based on dryland lucerne (cv. Hunter River) at Kynoch Station on deep sandy soils in the Upper South East of South Australia (Mediterranean climate …
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Nutritional constraints to lamb growth at pasture
… supply were measured in early weaned lambs grazing pure species swards of Rere lucerne (Medicago sativa, L), Huia white clover (Trifolium repens, C), Ruanui perennial ryegrass (Lolium perenne, R) and Matua prairie grass (Bromus catharticus, P). A study of the factors regulating intake was …
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Novel forage legumes for sustainable summer pasture mixtures in Saskatchewan
… forage dry matter yield (DMY), quality, grazing animal preference and performance, and cost-benefits analysis of binary legume-grass mixtures at AAFC SCRDC-Swift Current (Brown soil site) and WBDC-Lanigan (Thin Black soil zone) Saskatchewan. Experiment 1 forage varieties included AC …
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Behavior and Physiological Responses of Livestock Under Different Grazing Systems
… responses of heifers was evaluated when grazing either toxic tall fescue with wildtype endophyte (WE) or tall fescue with a novel endophyte (NE). Heifers (n = 24) were assigned to either WE or NE pastures for a 56-d grazing study during the summers of 2020 and 2021. Heifer average daily …
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Effect of urinary nitrogen, dairy shed effluent and nitrogen fertiliser on nitrate leaching from a pasture soil
… the pasture to 40-70 mm heights at typical grazing intervals. Drainage water was collected and analysed for nitrate-N, nitrite-N, ammonium-N, bromide and ¹⁵N. Over the period of the experiment (May 1996 to April 1998), the dominant form of N leached was nitrate-N. The annual average …