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 25 for “"below-ground biomass"”.
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Effect of Synthetic Chelating Agent Application to Soils on Phosphorus Availability
… Mehlich-1, and Mehlich-3 P and corn above- and below-ground biomass was quantified and analyzed for total P concentration. Without the presence of chelating agents, concentrations of WSP, Mehlich-1 P, Mehlich-3 P, above- and below-ground biomass, and TKP increased linearly as P fertilizer rates …
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Acclimation of marine macrophytes (Saccharina latissima and Zostera marina) to water flow
… root length in Z. marina but root length and below ground biomass were also significantly affected by sediment type, an indirect effect of water flow.
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The effects of the macroalga Gracilaria gracilis and increasing temperatures on the performance of the endemic Cape eelgrass Zostera capensis
… in greater leaf width, fouling and senescent biomass, as well as marginally greater leaf area and lower below-ground biomass at 30ᵒC. Increasing temperature also increased G. gracilis biomass, percent cover and fouling by microalgae. In addition, there was no interaction between temperature …
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The Potential for Carbon Sequestration in Soils on Lignite Coal Minelands in East Texas
… large amounts of carbon in their above- and below-ground biomass as well as in the soils. It has been estimated that if the world's deforested lands were reforested and properly managed, they could have the potential to sequester five billion megagrams of carbon per year (Kimmins 1997b). To …
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Seasonal Dynamics of Productivity and Photosynthesis of Three Biofuel Feedstocks: Field Comparisons of Miscanthus X Giganteus, Panicum Virgatum and Zea Mays
… led to increasing interest in the use of plant biomass as an alternative fuel source. One of the major limitations is in the amount of land area available to meet the needs of the expanding global population. To provide enough food, feed, fiber and fuel for the projected 9 billion people who …
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Quantifying the impacts of ozone pollution on the sustainability of pasture
… injury and premature senescence, reduced biomass production, declining production and yield, and impacts on forage quality. Ozone impacts on nodulation and nitrogen (N)-fixation in legumes have not extensively been investigated, but could have important consequences for pasture …
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Effects of Elevation and Nutrient Availability On the Primary Production of Spartina Alterniflora and the Stability of Southeastern Coastal Salt Marshes Relative to Sea Level Rise
… their effects on S. alterniflora above and below ground production, the primary drivers of accretion for these systems. 3 year averages of fertilized sample production showed a significant increase in above and below ground biomass with respect to the control (P<0.0001). Elevation also had a …
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Agronomic management to improve corn productivity under high-yielding environments
… became limited, plants produced more above-ground biomass at the expense of below-ground biomass. However, plants grown in a narrower spacing allocated more energy to producing below-ground biomass instead of above-ground biomass, subsequently reducing the shoot to root ratio. Which …
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Interactive effects of climate change and management on grassland greenhouse gas emissions
… changing plant productivity (either above and/or below-ground) and plant-soil properties. Plant species composition also plays a key role affecting the nutrient cycling thus GHG emissions in grasslands. The aim of this thesis is to understand how grassland management will influence C and N cycling …
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Comparative effects of conservation tillage systems on selected soil properties and yields of groundnut(arachis hypogaea)
… bulk density over time. However, the effects in groundnuts such as plant development, agronomic aspects such as biological nitrogen fixation and yields under conservation systems remain scanty. A study was carried out during the 2014/15 cropping season at Msekera research station in Chipata, …
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Comparative effects of conservation tillage systems on selected soil properties and yields of groundnut(arachis hypogaea)
… bulk density over time. However, the effects in groundnuts such as plant development, agronomic aspects such as biological nitrogen fixation and yields under conservation systems remain scanty. A study was carried out during the 2014/15 cropping season at Msekera research station in Chipata, …
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How successful is grassland restoration after removal of pine plantations on the eastern shores of Lake St Lucia?
… conditions by having massive storage organs below the ground. Using several response variables I was able to assess the effects of plantations on alpha- and beta-diversity and functional traits of forb and other grassland species and attempted to determine whether these disturbed grassland …
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Monitoring phytoremediation of petroleum hydrocarbon contaminated soils in a closed and controlled environment
… Lastly, using the monitoring data and the below ground biomass of the poplars from each of the experimental test cells, a rationally-based model was developed to be used as a starting point for quantitative prediction of the rate of PHC removal.
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Managing the continuous corn yield penalty with crop and residue management
… system? As grain yield level increased, stover biomass production increased, resulting in additional residue to be managed post-harvest, reinforcing the need to manage crop residue in not only continuous corn but also in high grain yield environments. Sizing down the stover material at harvest …
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The effects of elevated carbon dioxide concentration on leaf growth and development in Populus
… ([eCO2])<br/>causes increased above- and below-ground biomass compared to ambient conditions.<br/>Members of the Populus genus have risen to the forefront of plant research into the<br/>effects of [eCO2]. Members of the genus are extremely fast-growing, making them<br/>suitable candidates …
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Cover Crop Systems Impact on Biomass Production, Carbon-to-Nitrogen Ratio, Forage Quality, and Soil Health Indices in a Semiarid Environment.
… crop mixtures will produce greater above- and below-ground biomass and forage nutritive value and lower tissue carbon-to-nitrogen (C/N) ratios. We also hypothesize that these characteristics will promote greater soil organic carbon, total nitrogen, and microbial biomass and diversity compared …
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Assessment of carbon stock and selected soil fertility indicators in a bush encroached savanna at Erichsfelde farm, Namibia
… difference in the total (P=0.294>0.05) and above-ground (P=0.718>0.05) carbon stock. However, the below-ground carbon stock was significantly higher in the medium encroached site (P<0.001). This can be attributed to the fact that savanna vegetation accumulates most of its biomass underground as a …
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Plant ecology of the Namaqualand Strandveld : community structure and dynamics in a winter-rainfall desert
… the obscuration that the spatial distribution of below-ground biomass does not mirror the highly clumped above ground pattern, suggesting that competition for water is a likely possibility. Despite this evidence that interactions between individuals may shape the spatial structure of these …
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Nitrogen Fate and Transformations in the Production of Containerized Specialty Crops
… texture substrate resulted in higher above and below-ground biomass at experimental termination. Working with growers to develop best management practices will help to improve the use of N fertilizers and impact growers economically, while simultaneously reducing losses leading to less …
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HOW TO REDUCE TRANSPLANT STRESS IN URBAN TREES
… mediated carbon allocation, root growth and below ground biomass; and (iv) how severe pruning influences tree cooling capacity and microclimate amelioration in street conditions. The first experiment was conducted in a forest nursery, where seedlings of woody species were grown in a substrate …
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