Thesis (Ph. D.)--University of Hong Kong, 2004. / Also available in print.

Thesis (M.S.)--Montana State University--Bozeman, 2005. / Typescript. Chairperson, Graduate Committee: Cathy L. Cripps. Includes bibliographical references (leaves 194-212).

Thesis (M.S.)--University of Wisconsin--Madison, 1948. / Typescript. eContent provider-neutral record in process. Description based on print version record. Includes bibliographical references (leaves [24]-26).

Thesis (Ph. D.)--University of Texas at Austin, 2005. / Vita. Includes bibliographical references.

Thesis (MMedVet (Gyn))--University of Pretoria, 2005. / Includes bibliographical references.

Thesis (Ph. D.)--University of Missouri-Columbia, 1999. / Typescript. Vita. Includes bibliographical references (leaves 246-266). Also available on the Internet.

Thesis (Ph. D.)--Faculty of Veterinary Science, University of Sydney, 2005. / Title from title screen (viewed 13 January 2009). Degree awarded 2005; thesis submitted 2004. Submitted in fulfilment of the requirements for the degree of Doctor of Philosophy to the Faculty of Veterinary Science. Includes bibliographical references. Also available in print form.

Resumo: O trabalho foi realizado no município de Jaboticabal, SP (575 m de altitude, 21°15΄ 22˝ S e 48° 15΄ 58˝ W), tendo como objetivo verificar o efeito de doses de nitrogênio (uréia) e de esterco de bovino no estado nutricional, crescimento e produtividade de rabanete. O delineamento experimental foi blocos ao acaso, em esquema fatorial 2x4x4, com três repetições. Os tratamentos resultaram da combinação dos fatores cultivar (25 e 19), doses de esterco (0, 25, 50 e 75 t ha-1 em base seca) e doses de N (0, 60, 120 e 180 kg ha-1). O aumento nas doses de esterco e de N proporcionaram maiores altura de planta, área foliar, massa fresca e seca de raízes e produtividade comercial de ambas as cultivares, mas com maior contribuição do N do que do esterco. A máxima produtividade comercial da cv. 19 (20,3 t ha-1) foi obtida com 75 t ha-1 de esterco e 139 kg ha-1 de N, enquanto da cv. 25 (11,9 t ha-1) com 75 t ha-1 de esterco e 180 kg ha-1 de N. As doses de máxima eficiência econômica observadas para a cv. 25 foram 65,1 t ha-1 e 180 kg ha-1 de esterco e N, respectivamente, enquanto para a cv. 19 foram 63,6 t ha-1 e 144,7 kg ha-1 de esterco e N, respectivamente. / Abstract: This work was carried out in Jaboticabal, SP (575 m of altitude, 21°15΄ 22˝ S and 48° 15΄ 58˝ W) aiming verify nitrogen (urea) and cattle manure doses effect in the radish nutritional status, growth and productivity. The experimental design used was the randomized blocks within a 2x4x4 factorial scheme, 3 replications. The treatments resulted from the following combination: cultivars (25 and 19), cattle manure doses (0, 25, 50, and 75 t ha-1 dry basis) and N doses (0, 60, 120 and 180 kg ha-1). The increasing cattle manure and urea doses provided higher plant height, leaf area, root fresh and dry mass and commercial productivity in both cultivars, N contributing more than the cattle manure though. The cv 19 maximum commercial productivity (20.34 t ha-1) was obtained using 75 ton ha-1 of cattle manure and 139 kg ha-1 of N. to the cv 25 (11.90 t ha-1) with 75 t ha-1 of cattle manure and 180 kg ha-1 of N. The maximum economic efficiency dose observed to cv 25 were 65.1 t ha-1 and 180 kg ha-1 of cattle manure and N, respectively, while to cv 19 were 63.6 t ha-1 and 144.7 kg ha-1 of cattle manure and N, respectively. / Orientador: Arthur Bernardes Cecílio Filho / Coorientador: Edson Luiz Mendes Coutinho / Banca: Renato de Mello Prado / Banca: Joaquim Gonçalves de Pádua / Mestre

TELES, Thaisa Grazielle Radin Magalhães. Influência da adubação com npk na produção e composição química de brachiaria brizantha cv mg-4. 2006. 63 f. : Dissertação (Mestrado) - Universidade Federal do Ceará, Centro de Ciências, Departamento de Zootecnia, Programa de Pós-Graduação em Zootecnia. Fortaleza-CE, 2006. / Submitted by Eric Santiago (erichhcl@gmail.com) on 2016-08-09T14:19:58Z No. of bitstreams: 1 2006_dis_tgrmteles.pdf: 815694 bytes, checksum: 3a19e4e0cd45e633a7a0c3b534f56ef1 (MD5) / Approved for entry into archive by Nádja Goes (nmoraissoares@gmail.com) on 2016-08-09T14:34:11Z (GMT) No. of bitstreams: 1 2006_dis_tgrmteles.pdf: 815694 bytes, checksum: 3a19e4e0cd45e633a7a0c3b534f56ef1 (MD5) / Made available in DSpace on 2016-08-09T14:34:11Z (GMT). No. of bitstreams: 1 2006_dis_tgrmteles.pdf: 815694 bytes, checksum: 3a19e4e0cd45e633a7a0c3b534f56ef1 (MD5) Previous issue date: 2006 / This work was carried out in the Departments of Soil Science and Animal Science of the Federal University of Ceara, Campus do Pici, Fortaleza-CE, to evaluate the production and chemical composition of Brachiaria brizanta (Hochst ex A. Rich) Stapf. cv. MG-4, when subjected to different combinations of doses of NPK, in a greenhouse. The experiment was composed of sixteen combinations of doses NPK as matrix experimental PueblaII Plan, completely randomized design, with five repetitions. It was used a Argisol Red Yellow Distrophic Arênico and, as a source N, P and K, were used ammonium sulfate and urea, triple superphosphate and potassium chloride, respectively. Cutting uniformity of the plants was conducted at 42 days after germination, to 15 cm from the ground. The first cut of use was made 28 days after the cutting of uniformity to 15 cm from the ground and the second cut of use to 28 days after the first cut of use to 15 cm from the ground. The material collected the first and second cutting wire separated into leaves and stems and put the assessments of dry matter (DM) of the shoot, crude protein (CP) and determine the levels of N, P and K of the leaves and stems. The doses of 360-370-360 g / pot of NPK provide 95% of the increased production of MST observed. There are squared effects of doses of N, at doses of 373, 407 and 317 of N mg/dm3 for maximum production estimated MST, MSF and MSC, respectively. Using up the doses of 360 mg P and K/dm3 of soil, returned to linear effect of doses of P for production of MST and MSF, however, there was no effect on production of MSC. Were obtained linear effects of doses of K on the production of MST, MSF and MSC. The doses of N and K linearly affected the levels of PBF, while P had no significant effect, and the levels of PCBs were not affected by doses of NPK. The levels of PBF were higher than levels found in stems. The phosphate fertilizer and foremost, the nitrogen, caused an increase in the accumulated amount of N, P and K. the increase of nitrogen reduced the level of P in the leaves. / O presente trabalho foi realizado nos Departamentos de Ciências dos Solos e Zootecnia da Universidade Federal do Ceará, Campus do Pici, Fortaleza-CE, com o objetivo de avaliar a produção e composição química da Brachiaria brizanta (Hochst ex A. Rich) Stapf. cv. MG-4, quando submetida a diferentes combinações de doses de NPK, em casa de vegetação. O experimento foi constituído de dezesseis combinações de doses NPK, conforme matriz experimental Plan PueblaII, delineamento inteiramente casualizado, com cinco repetições. Utilizou-se um Argissolo Vermelho Amarelo Distrófico Arênico e, como fonte N, P e K, foram utilizados sulfato de amônio e uréia, superfosfato triplo e cloreto de potássio, respectivamente. O corte de uniformização das plantas foi realizado aos 42 dias após a germinação, a 15 cm do solo. O primeiro corte de utilização foi realizado 28 dias após o corte de uniformização a 15 cm do solo e, o segundo corte de utilização aos 28 dias após o primeiro corte de utilização a 15 cm do solo. O material colhido do primeiro e segundo corte fio separado em folhas e colmos e submetido as avaliações de produção de matéria seca (MS) da parte aérea, proteína bruta (PB) e determinação dos teores de N, P e K das folhas e colmos. As doses de 360-370-360 g/vaso de NPK proporcionam 95% da maior produção de MST observada. Verificam-se efeitos quadráticos das doses de N, com as doses de 373, 407 e 317 mg/dm3 de N para produção máxima estimada de MST, MSF e MSC, respectivamente. Utilizando-se as doses de 360 mg de P e de K/dm3 de solo, obteve-se efeito linear das doses de P para produção de MST e MSF, entretanto, não houve efeito para produção de MSC. Foram obtidos efeitos lineares das doses de K sobre a produção de MST, MSF e MSC. As doses de N e K afetaram linearmente os teores de PBF, enquanto as de P não surtiram efeito significativos, e os teores de PBC não foram afetados pelas doses de NPK. Os teores de PBF foram superiores aos teores encontrados nos colmos. A adubação fosfatada e principalmente, a nitrogenada, provocaram aumento na quantidade acumulada de N, P e K. o aumento da adubação nitrogenada reduziu o teor de P nas folhas.

Increased nitrogen (N) deposition onto boreal peatlands and forests is anticipated with further expansion of Alberta's oil sands industry and consequently, an increase in sources of nitrogen oxide emissions. Increased N deposition has the potential to affect peatland flora and alter N cycling patterns in peatlands, therefore it is imperative to investigate at what level of excess N deposition these effects take place. This thesis discusses results from the first two years of a five year N fertilization study being conducted at a peatland complex near the hamlet of Mariana Lake in northeastern Alberta, Canada aimed at quantifying the N "critical load" for these peatland ecosystems. At the study site there are forty-two experimental plots - half in an ombrotrophic bog, the other half in the poor fen - with varying N fertilization treatments ranging from 0 kg/ha/year to 25 kg/ha/year. To investigate nitrogen uptake by plants at the Mariana Lake study site, I measured nitrogen (N) and carbon (C) concentrations of Sphagnum capitulum tissue and vascular plant foliar tissue. For Sphagnum species, I also analyzed C:N ratios and capitulum N storage. To investigate potential growth response of the target Sphagnum species, measurements were taken for linear growth (the vertical elongation of the Sphagnum shoots), stem mass density (the weight of Sphagnum stems occupying a volume after capitula were removed), and ultimately, net primary production (the product of the prior two measurements). Capitulum mass density (biomass) was measured as well to investigate possible changes in Sphagnum capitulum growth. Also, during the height of the growing season (mid-July, 2011 and 2012), the plant communities in each treatment plot were sampled to provide "baseline" data necessary for documenting any shifts in plant distribution or community composition that may occur after N additions.