Avaliação da compactação do solo por meio de imagens digitais em diferentes sistemas de preparo do solo na cultura do feijão

• Ano de defesa: 2011
• Autor(a) principal: Leite, Daniel Mariano
• Orientador(a): Vieira, Luciano Baião
• Banca de defesa: Fernandes, Haroldo Carlos , Fernandes Filho, Elpídio Inácio
• Tipo de documento: Dissertação
• Tipo de acesso: Acesso aberto
• Idioma: por
• Instituição de defesa: Universidade Federal de Viçosa
• Programa de Pós-Graduação: Mestrado em Engenharia Agrícola
• Departamento: Construções rurais e ambiência; Energia na agricultura; Mecanização agrícola; Processamento de produ
• País: BR
• Palavras-chave em Português: Máquinas agrícolas; Sensoriamento remoto; Phaseolus vulgaris L.
• Palavras-chave em Inglês: Agricultural machinery; Remote sensing; Phaseolus vulgaris L.
• Área do conhecimento CNPq: CNPQ::CIENCIAS AGRARIAS::ENGENHARIA AGRICOLA
• Link de acesso: http://locus.ufv.br/handle/123456789/3592

The productivity of beans in Brazil is considered low around 820 kg ha-1, can reaching values above 3000 kg ha-1, several environmental factors may limit the performance of culture, especially those related to the soil. In this form it was objectified with the accomplishment of this work to evaluate the compacting of the ground in the culture of beans in different systems of preparation of the ground, by means of digital images. This study was conducted at the Universidade Federal de Viçosa, in Viçosa, MG, we used the randomized block design with six replicates, four treatments evaluated (tillage, conventional tillage, minimum tillage using grate and minimum tillage scarificator) using the SAS 9.2 software to perform the statistical analysis. We evaluated the percentage of emergence and seedling emergence index, the spectral response using vegetation indices, the final stand, yield components and final yield of grain. For the emergence percentage and rate of seedling emergence, were assessed in seedling emergence in a length of 10 m on the center line of each experimental unit. Vegetation indices (NDVI, RS, GNDVI, VARI, WDRVI and SAVI) were calculated from the values of the numbers of digital images and the estimated values of reflectance, for the acquisition of images was used a platform containing two digital cameras, a sensitive in the visible (RGB) and the other sensitive to near infrared region, this platform was attached to a balloon inflated with helium gas. Already, for the final stand, the component of income and productivity of grains were counted the number of plants, pods, seeds and the mass of 100 seeds in the three central lines in 4 linear meters of each experimental unit. According to the results found no difference in emergence percentage and emergence rate index in treatments. Vegetation indices derived from the values of the numbers of digital images were only able to differ from the treatments at 70 days after planting. Already, the indices obtained by the estimated values of reflectance differed treatments at 34 and 70 days after planting. The final stand, yield components and grain yield did not vary as to the systems of tillage.