Instituto de Ciências Agrárias – CRP
URI permanente desta comunidadehttps://locus.ufv.br/handle/123456789/11787
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Item SPEED Stat: a free, intuitive, and minimalist spreadsheet program for statistical analyses of experiments(Crop Breeding and Applied Biotechnology, 2020) Carvalho, André Mundstock Xavier de; Mendes, Felipe Queiroz; Mendes, Fabrícia Queiroz; Tavares, Laene de FátimaSPEED Stat is a new spreadsheet program for univariate statistical analyses, focused on the dominant profile of agricultural experimentation. The program can perform analysis of variance; tests for normality, homoscedasticity, additivity, outliers; complex contrasts; multiple comparison tests; Scott-Knott's grouping analysis; regression analysis; and others. It has available at speedstatsoftware.wordpress.com.Item Propolis extract in postharvest conservation banana 'prata'(Revista Brasileira de Fruticultura, 2016-03) Passos, Flávia Regina; Mendes, Fabrícia Queiroz; Cunha, Mariana Crivelari da; Pigozzi, Mariana Teixeira; Carvalho, André Mundstock Xavier deIn the present work were evaluated the effects of propolis coatings of various botanical sources on quality traits of bananas cv. Prata (Musa sapientum L.) stored at room temperature. ´Prata´ bananas were selected and submitted to five postharvest treatments: four coatings applied by immersion in propolis extracts at a concentration of 2.5% (w/v) and a control (without coating). Propolis extracts were applied as 1) a wild type aqueous propolis extract, 2) a wild type hydroalcoholic propolis extract, 3) a rosemary green type hydroalcoholic propolis extract and 4) a red type hydroalcoholic propolis extract. The bananas were evaluated at three-day intervals along 12 days for fresh weight losses, flesh firmness, soluble solids (SS), titratable acidity (TA), the ratio SS/TA and pH. Sensory analyses were performed after three and six days of storage by 55 not trained panelists designed for acceptability. At the end of the twelve-day storage period, bananas coated either with the rosemary green hydroalcoholic extract or with the aqueous extract presented lower fresh weight losses in comparison to the bananas of the control treatment. No differences were determined in relation to flesh firmness and along the storage period TA values decreased and pH values increased in bananas of all treatments. SS contents increased towards the end of the storage period that, consequently, contributed to increases in the SS/TA ratio. The most significant increase in SS/TA ratio was determined in bananas coated with the red type hydroalcoholic extract. Taste panelists did not detect significant differences amongst coated and not coated cv. Prata bananas up to six days of storage.Item Suco misto de laranja e cenoura em diferentes concentrações(The Journal of Engineering and Exact Sciences, 2018) Santana, Kelly Isis; Passos, Flávia Regina; Carvalho, André Mundstock Xavier de; Mendes, Fabricia QueirozObjetivou-se neste estudo avaliar físico-químicamente e sensorialmente suco misto de laranja e cenoura em diferentes concentrações. As análises físico-químicas foram realizadas em intervalos de oito dias por 22 dias de armazenamento. A análise sensorial foi realizada através do teste de aceitação no oitavo dia de armazenamento. Os sólidos solúveis e a acidez titulável não variaram entre os tratamentos. A acidez titulável variou ao longo do período de armazenamento, sendo esta variação acompanhada pelo aumento do pH. O tratamento controle apresentou menor teor de resíduo seco, diferindo do tratamento com 20% de suco de cenoura. Ao final do período de armazenamento, o teor de resíduo seco apresentou um aumento significativo. Os açúcares redutores diminuíram gradualmente em todos os tratamentos no decorrer do período de armazenamento dos sucos. Os tratamentos com 10% e 20% de suco de cenoura obtiveram melhor aceitação, não tendo sido verificado diferença significativa entre o tratamento controle.Item Propolis extract in postharvest conservation of Solo papaya cv. ‘Golden’(Semina: Ciências Agrárias, 2016-09-18) Passos, Flávia Regina; Mendes, Fabrícia Queiroz; Pinto, Marina de Carvalho Eufrásio; Araújo, Emiliane Andrade; Carvalho, André Mundstock Xavier deThe high perishability of papaya (Carica papaya L.) reduces the lifespan as well as limits marketing. Coating fruit is an alternative process to aid food preservation. The objective of this study was to evaluate the effects of propolis extract coating on physicochemical characteristics of papaya stored at room temperature. Solo papayas cv. ‘Golden’ were randomly divided into five postharvest treatments: three forms of dip-coating (70% alcohol, hydroalcoholic extract of propolis at 2.5%, and hydroalcoholic extract of propolis at 5%) and two controls (one uncoated and one with refrigerated uncoated fruit). Each four days, weight loss, fruit firmness, soluble solids (SS), titratable acidity (TA), SS/ TA ratio, and hydrogen potential (pH) were evaluated throughout 12 days of storage. A sensory analysis was performed on the fourth day of storage, being appraised by untrained tasters through acceptance testing. Refrigerated, 2.5% propolis, and 5% propolis treatments promoted the lowest weight losses. Flesh firmness of 5% propolis treatment was superior to that of control, alcohol, and 2.5% propolis treatments. Moreover, 5% propolis treatment achieved a great SS, differing only from alcohol treatment. Both TA and SS/TA had no variations among treatments, but along storage time. Flesh pH of refrigerated papaya showed significant differences in relation to other treatments. Also, refrigerated fruit presented chilling injury symptoms. Propolis-coated papaya showed sensory acceptability similar to those of the other treatments on the 4 th day of storage. Therefore, propolis coating renders Solo papaya cv. ‘Golden’ a promising alternative to control fruit weight losses and firmness.Item An evaluation of the use of statistical procedures in soil science(Revista Brasileira de Ciência do Solo, 2016-08-29) Tavares, Laene de Fátima; Carvalho, André Mundstock Xavier de; Machado, Lucas GonçalvesExperimental statistical procedures used in almost all scientific papers are fundamental for clearer interpretation of the results of experiments conducted in agrarian sciences. However, incorrect use of these procedures can lead the researcher to incorrect or incomplete conclusions. Therefore, the aim of this study was to evaluate the characteristics of the experiments and quality of the use of statistical procedures in soil science in order to promote better use of statistical procedures. For that purpose, 200 articles, published between 2010 and 2014, involving only experimentation and studies by sampling in the soil areas of fertility, chemistry, physics, biology, use and management were randomly selected. A questionnaire containing 28 questions was used to assess the characteristics of the experiments, the statistical procedures used, and the quality of selection and use of these procedures. Most of the articles evaluated presented data from studies conducted under field conditions and 27 % of all papers involved studies by sampling. Most studies did not mention testing to verify normality and homoscedasticity, and most used the Tukey test for mean comparisons. Among studies with a factorial structure of the treatments, many had ignored this structure, and data were compared assuming the absence of factorial structure, or the decomposition of interaction was performed without showing or mentioning the significance of the interaction. Almost none of the papers that had split-block factorial designs considered the factorial structure, or they considered it as a split-plot design. Among the articles that performed regression analysis, only a few of them tested non-polynomial fit models, and none reported verification of the lack of fit in the regressions. The articles evaluated thus reflected poor generalization and, in some cases, wrong generalization in experimental design and selection of procedures for statistical analysis.Item Nutrient demand by the carrot crop is influenced by the cultivar(Revista Brasileira de Ciência do Solo, 2014-12-02) Aquino, Rosiane Filomena Batista Almeida; Assunção, Natália Silva; Aquino, Leonardo Angelo; Aquino, Priscila Maria de; Oliveira, Guilherme Anthony de; Carvalho, André Mundstock Xavier deFarmers must carefully choose the cultivar to be grown for a successful carrot crop. The yield potential of the cultivar may influence nutrient demand and should be known to plan for fertilization application. The aim of this study was to evaluate the cultivar effect on carrot yield and on the nutrient content and quantities allocated to leaves and roots. Three experiments were set up in two crop seasons in Rio Paranaíba, MG, Brazil. In the first season, typical summer, 10 summer cultivars were sown. In the second season, summer-winter (transition), two experiments were set up, one with summer cultivars and the other with winter cultivars. The treatments consisted of the carrot cultivars distributed in randomized blocks with four replications. Fresh and dry matter of the roots and leaves was quantified. Yield was calculated based on fresh matter of the roots. The nutrient content in leaves and roots was determined at the time of harvest. These contents and the dry matter production of roots and leaves were used to calculate nutrient uptake and export. The greatest average for total and commercial yield occurred in the crop under summer conditions. Extraction of N and K for most of the cultivars in the three experiments went beyond the amounts applied through fertilizers. Thus, there was contribution of nutrients from the soil to obtain the yields observed. However, the amount of P taken up was considerably less than that applied. This implies that soil P fertility will increase after cropping. The crop season and the cultivars influenced yield, nutrient content in the leaves and roots, and extraction and export of nutrients by the carrot crop.