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  • About
  • The Global ETD Search service is a free service for researchers to find electronic theses and dissertations. This service is provided by the Networked Digital Library of Theses and Dissertations.
    Our metadata is collected from universities around the world. If you manage a university/consortium/country archive and want to be added, details can be found on the NDLTD website.
1

Análise do crescimento, do desenvolvimento e da produtividade da cultura do milho (Zea mays L.): experimentos e modelos / Analysis of growth, development and productivity in maize (Zea mays L.): experiments and models

Barros, Alexandre Hugo Cezar 30 June 1997 (has links)
Submitted by Nathália Faria da Silva (nathaliafsilva.ufv@gmail.com) on 2017-07-20T11:41:59Z No. of bitstreams: 1 texto completo.pdf: 35422444 bytes, checksum: a45fecbec1e455b7c88b6fc1de4c1c43 (MD5) / Made available in DSpace on 2017-07-20T11:41:59Z (GMT). No. of bitstreams: 1 texto completo.pdf: 35422444 bytes, checksum: a45fecbec1e455b7c88b6fc1de4c1c43 (MD5) Previous issue date: 1997-06-30 / Conselho Nacional de Desenvolvimento Científico e Tecnológico / Desenvolveu-se um modelo agrometeorológico para simular o crescimento, o desenvolvimento e a produtividade da cultura do milho (Zea mays L.). O modelo foi testado com os dados obtidos na Estação Experimental de Vitória de Santo Antão - PE. Três partes principais constaram do modelo. Na primeira foram computados os ganhos energéticos, representados pela fotossíntese. Na segunda, as perdas do sistema relativas à respiração de manutenção e crescimento. Após o estabelecimento do incremento diário de matéria seca para as diversas partes da planta, na terceira parte, procurou-se estabelecer as relações com o incremento da área foliar. Levaram-se em consideração as interações das condições meteorológicas e o estado fisiológico das plantas. As pressuposições fundamentaram-se em resultados disponíveis na literatura. O modelo proposto mostrou-se consistente para simular o crescimento, o desenvolvimento e a produtividade da cultura do milho, sendo similar aos valores obtidos experimentalmente. Os parâmetros mais sensíveis no modelo foram a eficiência fotossintética e a respiração de manutenção. / An agrometeorological model was developed to simulate the growth, the development and the productivity of maize (Zea mays L.). The model was tested with data obtained at the Experimental Station of Vitória de Santo Antão - PE. The model consisted of three major parts. ln the first part, the energetic gains represented by the photosynthesis were computed. In the second one, the system losses relative to the maintenance respiration and growth were evaluated. In the third one, after the establishment of the daily dry matter increment for the various plant parts, it was attempted to establish the relations with the foliar leaf increment. The interations of the meteorological conditions and the plant physiological estate. The presuppositions were based on the results available in the literature. The proposed model showed to be consistent to simulate the growth, the development and the productivity of maize cropping, being similar to those values which were experimentally obtained. The parameters most sensitive in the model were the photosynthetic efficiency and the maintenance respiration.

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