01.1 - Graduação (Sede)
URI permanente desta comunidadehttps://arandu.ufrpe.br/handle/123456789/2
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Resultados da Pesquisa
Item Desenvolvimento de modelos matemáticos para estimativa da área foliar de leguminosas forrageiras(2020-10-27) Guimarães, Larissa Morane Pinto; Cunha, Márcio Vieira da; http://lattes.cnpq.br/8936474723708253; http://lattes.cnpq.br/4555295690063951The leaf area is an important characteristic of forage plants. Through it, it is possible to monitor the development of plants and calculate the leaf area index, which has been used as a parameter for the management of forage plants. The objective of this work was to evaluate mathematical models to estimate leaf area of the styling leguminous seabrana (Stylosanthes seabrana BL Maass & 't Mannetje), Leucena (Leucaena leucocephala (Lam.) De Wit.) And Gliricidia (Gliricidia sepium (Jacq.) Kunth ex Walp.) Depending on the length, width and product of the leaf length and width. 200 expanded leaves were collected per legume species. For measurements of leaf dimensions (length and width), a measuring tape graduated in centimeters was used and for the leaf area, the Easy Leaf Area Free application was used for smartphones. Descriptive statistical analysis of the studied variables (leaf area, length and width) was performed and three linear models were tested for each species and for the set of leaves of all species, totaling 12 models, using the leaf area as a dependent variable. The performance of the models was evaluated by RMSE (root mean squared error) and R2. The model with the product of leaf length and width as an independent variable showed the best fit and estimate of the leaf area. Thus, it was possible to estimate the leaf area of forage legumes with greater precision through the product of leaf length and width, in all legumes, notably in Gliricídia. In addition, the best model was obtained by integrating all leaves of the species. The Easy Leaf Area Free smartphone application proved to be efficient and easy to use to estimate the leaf area of the studied legumes.Item Caracterização morfológica e produção de matéria seca de diferentes leguminosas nativas(2021-11-24) Santos, André Evaristo dos; Santos, Mércia Virginia Ferreira dos; http://lattes.cnpq.br/9565465836878202; http://lattes.cnpq.br/3609738904440535Brazil is extremely rich in natural resources, being the cradle of plant species of forage interest. As national animal production occurs almost entirely in pastoral systems, which is the cheapest form of animal feed, it is necessary to study forage species adapted to different edaphoclimatic conditions, as well as persistent ones to contribute to the sustainability of production systems animals to pasture. Desmanthus spp and Stylosanthes spp are legumes that occur spontaneously in Northeastern Brazil, with desirable characteristics for cultivation and feeding of ruminants. The objective was to evaluate the morphological and productive characteristics of accessions of Stylosanthes spp and Desmanthus spp from different locations, which make up the Active Germplasm Bank (BAG) of the Federal Rural University of Pernambuco (UFRPE). The plants were cultivated in a greenhouse at the Department of Animal Science and transferred to the BAG / UFRPE, located in the Experimental Station of Sugarcane do Carpina, North wood zone of the state at latitude 7º, 51 '04' 'S, longitude 35º, 14 '27' 'The altitude of 180m in 2017. Variance was observed in all morphological and productive characteristics studied, both for Desmanthus genotypes and for Stylosanthes genotypes, showing the variability between materials and the possibility of being selected superior to the future.