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.
Results
Showing 1 to 19 of 19 for “"foliar nitrogen"”.
-
Effect of Foliar Nitrogen and Sulfur Applications on Aroma Profile of Vitis vinifera L. cv. Petit Manseng using Modified Quantitative Descriptive Analysis, SPME GC-MS and Electronic Nose Technology
… in 2011 and 2012 were fertilized with soil nitrogen at 0, and 30 kgN/ha, foliar nitrogen at 15kg/ha and foliar nitrogen plus sulfur at 15kg/ha and 5kg respectively. Point quadrat analysis demonstrated foliar nitrogen alone and nitrogen plus sulfur treatments increased percent gaps and lower …
-
Loblolly Pine (Pinus taeda L.) Plantation Response to Mechanical Site Preparation in the South Carolina and Georgia Piedmont
… soil organic matter (SOM) content; however, soil nitrogen, foliar nitrogen, bulk density, and macroporosity were not affected by site preparation. All treatments were equally deficient in foliar nitrogen. The Shear/Disc and Shear/Rake/Disc treatments had a significantly positive relationship …
-
The Effects of Nitrogen and Phosphorus Fertilizer on a Young Loblolly Pine Plantation on Lignite Mine Spoil in East Texas
<p>Five levels of nitrogen fertilizer combined with three levels of phosphorus fertilizer were tested in a two year-old loblolly pine plantation on a lignite mine spoil in East Texas. Growth parameters, foliar and spoil nitrogen and phosphorus concentrations were measured after two growing seasons. …
-
Structure of relict arctic plant communities along the north shore of Lake Superior
… curves. Species had their highest foliar nitrogen (N) and phosphorus (P) concentrations in the communities where they were most dominant. These correlations suggest that with a warmer and drier climate, the plants will experience increased moisture stress, especially in smaller …
-
Survival and growth of pine seedlings on strip-mined sites
… growth, ectomycorrhizal colonization, and foliar nutrient levels of container-grown white (Pinus strobus L.), loblolly (P. taeda L.), and Virginia pine (P. virginiana Mill.) seedlings were studied on a recontoured and a fiat bench strip-mine site in Southwestern Virginia. One-half of the …
-
Growth, water use efficiency and stable carbon isotopes in commercial clones of Eucalyptus
… area, leaf canopy density, specific leaf area, foliar nitrogen concentration and instantaneous rates of photosynthesis and transpiration, on growth, water use efficiency and the water cost of wood production. (iii) The complications associated with sampling for stable carbon isotope ratios …
-
Environmental Influences on Gas Exchange in Fertilized and Non-Fertilized Stands of Loblolly Pine
Spatial and temporal variation in foliar gas exchange on both a diurnal and seasonal scale was examined in 15-year-old fertilized and non-fertilized loblolly pine in the upper and lower thirds of crowns in stands located in the North Carolina sandhills. Photosynthesis rates between control and …
-
Evaluating the nutritional status of Fraser fir [Abies fraseri (Pursh) Poir.] Christmas trees using foliar analysis and DRIS application
… Christmas trees to determine the variation in foliar nitrogen (N) , phosphorus (P) , potassium (K), calcium (Ca), and magnesium (Mg) levels among plantation ages, sample locations within the crown, and effects due to seasonal changes. Extensive variation in nutrient concentrations existed with …
-
Quantification and Physiology of Carbon Dynamics in Intensively Managed Loblolly Pine (Pinus taeda L.)
… capacity, which paralleled changes in foliar nitrogen. Leaf area accumulation and enhanced growth following fertilization was partly due to enhanced C fixation capacity [Chapter 4]. Fertilization altered the contribution of autotrophic and heterotrophic respiration to total soil CO2 …
-
Mono-Oxygenase Activity and Nutritional Ecology of Larvae of the Gypsy Moth, Lymantria Dispar
… season oak vs. pine is not attributable to lower foliar nitrogen, since oak contains more N per dry weight than does pine; however, foliar water content is higher in late season pine compared with oak. Use of a model system, in which larvae were reared on artificial diets prepared from lyophilized …
-
Managing symbiotically-fixed nitrogen on mined land for tree crops
… coal contain low levels of organic matter and nitrogen. It was hypothesized that nitrogen-fixing plants could be incorporated into a reforestation system in a manner that would meet the short term and long-term nitrogen needs of crop trees while rebuilding the soil and litter nitrogen pools and …
-
Response of marula to simulated browsing on a productivity gradient
… new shoots, new shoot length, leaf biomass and foliar nitrogen along a productivity gradient. Conversely, marula saplings showed a trend of decreasing flavonoid content, condensed tannin concentration, Neutral-detergent fibre, acid-detergent fibre, and acid-detergent lignin in response to to …
-
The short-term effects of fertilization on loblolly pine (Pinus taeda L.) photosynthesis, dark respiration, and leaf area
The initial physiological processes leading to enhanced growth of loblolly pine subsequent to fertilization are not clearly understood. Much of the debate revolves around the temporal response of photosynthesis (Pn) to fertilization or even if Pn increases at all due to enhanced nutrition. This …
-
Photosynthesis and transpiration in a dry-land Pinus radiata forest
… measured at a range of temperatures and leaf nitrogen concentrations in order to quantify parameters describing photosynthetic capacity and temperature response in a biophysical model of C₃ photosynthesis. Increasing leaf temperature from 8 °C to 30 °C caused a four-fold increase in Vcₘₐₓ the …
-
Foliar Herbivory on Understory Oaks as a Function of Forest Type and Prescribed Burning
… related leaf loss to plant water status, leaf nitrogen (N) concentrations, light, and general environmental conditions. The study took place within the Drury Conservation Area, located in Taney County, Missouri. Study sites representing unburned and burned savanna and forest habitats were …
-
Ecology of greater gliders, Petauroides Volans Kerr 1792, in relation to variations in habitat quality in eucalypt forests in south-east New South Wales
… primarily determined by the concentrations of nitrogen, phosphorus and potassium in the mature foliage of the eucalypts. I investigated this hypothesis in relation to the Greater Glider Petauroides votans. The first main objective of my study was to examine why population densities of P. votans …
-
Ecology of greater gliders, Petauroides Volans Kerr 1792, in relation to variations in habitat quality in eucalypt forests in south-east New South Wales
… primarily determined by the concentrations of nitrogen, phosphorus and potassium in the mature foliage of the eucalypts. I investigated this hypothesis in relation to the Greater Glider Petauroides votans. The first main objective of my study was to examine why population densities of P. votans …
-
Dynamics of water, carbon, and nitrogen in forest and alpine tundra ecosystems in the Pacific Northwest and the Rocky Mountains of the U.S. under future climate change
… and alter future dynamics of water, carbon, and nitrogen in these ecosystems; 2) other aspects of global change such as elevated atmospheric CO2 concentrations and an extended growing season will alleviate the impacts of physiological stress on ecosystem function and element dynamics; and 3) …