ResumoO feijão-comum (Phaseolus vulgaris L.) é um dos mais tradicionais pratos da culinária brasileira, merecendo assim atenção de estudiosos das diversas áreas do conhecimento. A secagem consiste na remoção de grande parte de água inicialmente contida no produto com o intuito de promover longos períodos de armazenamento. O ajuste de modelos matemáticos para representação da cinética de secagem de produtos agrícolas contribui para a melhoria da eficiência do processo e, ainda, permite estimar o tempo de secagem. Objetivou-se, neste trabalho, estimar as curvas de secagem dos grãos de feijão da Cultivar BRS Estilo, bem como obter o coeficiente de difusão efetivo e as propriedades termodinâmicas nas temperaturas de secagem de 60, 70 e 80 °C. Aos dados experimentais foram ajustados diversos modelos matemáticos utilizados para representação da secagem de produtos agrícolas. Dentre os modelos que apresentaram melhor ajuste aos dados experimentais, o de Henderson e Pabis Modificado foi o que melhor se ajustou aos dados nas diferentes condições de secagem. O aumento da temperatura do ar de secagem proporciona o aumento da energia livre de Gibbs e da difusividade de água nos grãos, reduz a entalpia e mantém a entropia negativa.Palavras-chave adicionais: difusividade; energia livre de Gibbs; Phaseolus vulgaris L.

The Cerrado has fruit species of great potential of use in commercial systems of agricultural production. They are obliged to carry out studies on the production of seedlings, contributing to a perpetuation of these species. The objective of this study was to evaluate the effect of different substrates and different doses of Basacote® on the emergence and early development of B. gaudichaudii plants. The experiment was conducted in a greenhouse in the experimental area of the Goiano Federal Institute-Campus Ceres. Experiment 1 was composed of six treatments (six compositions) and experiment 2 consisted of 5 treatments (five doses of Basacote®). The experimental design was a randomized complete block with four replicates and 12 plants per experimental plot. The variables analyzed were emergence, height, lap diameter, number of leaves, root system length, survival rate and fresh and dry matter of the aerial part and root system. The substrate composed of bovine manure + Plantmax® + soil provides better conditions for growth and development of mamacadella plants. The mamacadela seedlings do not tolerate high levels of organic matter in the substrate. For the production of Brosimum gaudichaudii seedlings the use of the 6.48 g dose of Basacote® plant-1 is indicated.

Desenvolvimento inicial de mamacadela implantada por semeadura direta e mudas Initial development of mamacadela implanted by direct seeding and seedlings

Gabiroba is a species with potential for commercial cultivation due to its desirable agronomic characteristics, such as high yield and high levels of soluble solids. The objective of this study was to characterize fruits and seeds phenotypically and to evaluate the genetic structure in three natural subpopulations of Campomanesia adamantium, based on quantitative data. Fruits of gabiroba plants from three subpopulations were collected, sampling 10 mother plants per subpopulation, with collection of at least 10 fruits per matrix, totaling 300 fruits. Physical characterization data of fruits and seeds were submitted to descriptive analysis, analysis of variance and correlation among characters. There was significant variation for the length, width and fruit mass in C. adamantium at all hierarchical levels evaluated: among subpopulations and among mother plants within subpopulations. Most of the variation, for the three variables under study is found among fruits within mother plant, and then, there is greater variation among mother plants within subpopulation. The levels of variation found within the subpopulations were low. The correlation analysis demonstrated the existence of positive and high correlations between the variables such as, fruit length and fruit width, fruit length and fruit mass, fruit width and fruit mass. For a possible breeding program and / or conservation of the species, it is recommended to represent large number of subpopulations to ensure an adequate representativeness of the observed variability.

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