Agricultura Tropical

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http://repositorio.ufes.br/handle/10/17346
Programa de Pós-Graduação em Agricultura Tropical

Centro: CEUNES
Telefone: (27) 3312 1701
URL do programa: http://agriculturatropical.ufes.br

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Navegando Agricultura Tropical por Autor "Amaral, José Augusto Teixeira do"

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    Dimensionamento amostral e determinação do tamanho ótimo de parcelas para avaliação de mudas de berinjela e jiló
    (Universidade Federal do Espírito Santo, 2017-07-18) Hell, Leonardo Raasch; Fernandes, Adriano Alves; Schmildt, Omar; Berilli, Sávio da Silva; Schmildt, Edilson Romais; Amaral, José Augusto Teixeira do
    The number of plants evaluated in experiments should be a representative sample of the population. Their data must be reliable so that they allow high likelihood of success in subsequent experiments. Add to this the fact that the specialized literature does not yet provide answers on plot and sample size for most crops in the seedling phase. The aim of this study was to determine the size of plots and of the sample in the evaluation of eggplant and jilo seedlings. For this, two experiments were carried out in the municipality of Colatina - ES, where both vegetable seedlings were produced in trays of expanded polystyrene containing 128 cells. The first objective was to determine the sample size needed to estimate the average quality characteristics of eggplant and jilo seedlings applied to a set of characteristics (leaf number, total leaf area, shoot fresh matter mass, root fresh matter mass, total fresh matter mass, and Dickson quality index). Central trend and variability measures were calculated, and normality of the sample data was verified and then the sample size was calculated by bootstrap simulation. The sampling design requirement is different among the different characteristics of the eggplant and jilo seedlings, and also different for the same characteristic between the two species. The sample size for evaluating seedlings, for the estimation error of 10% of the estimated mean, with a x confidence level of 95%, is 32 and 26 eggplant and jilo seedlings, respectively. The second one had the objective of determining the optimum plot size for experiments involving eggplant and eggplant Solanaceae, applied on a set of characteristics (shoot height, stem diameter, number of leaves, total leaf area, shoot dry matter mass, root dry matter mass, total dry matter mass, and Dickson quality index). Measurements of central tendency and variability of the sample data were calculated and the optimal plot size was calculated using the modified maximum curvature method with bootstrap simulation. The optimal plot size is different for the characteristics evaluated in eggplant and jilo seedlings. Considering the evaluation of all aerial and root characteristics, the optimal plot size is 6 and 5 seedlings, for eggplant and jilo, respectively.
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    Fertilizantes de liberação controlada no crescimento e desenvolvimento do mamoeiro 'THB'
    (Universidade Federal do Espírito Santo, 2017-07-18) Simão, Letícia Abreu; Gontijo, Ivoney; Schmildt, Omar; Schmildt, Edilson Romais; Amaral, José Augusto Teixeira do
    Brazil is one of the main producers and exporters of papaya. The main Brazilian states producing papaya are Bahia and Espírito Santo, which are responsible for about 60% of the national production. The controlled release fertilizer use is rarely used field in the state of Espírito Santo, especially for fruit trees. In the State, it has been applied in the eucalyptus crop. The use of these types of fertilizers has as one of the main advantages the reduction of labor for cover fertilizations. In these fertilizers, the release of nutrients is dependent on the granule size, temperature and humidity. The nutrients are made available by hydrolysis and by the action of microorganisms. The objective of this study was to evaluate the efficiency of controlled release fertilizers on growth and development of plants papaya 'THB' in the vegetative and productive stage using fertilizers Basacote P-MAX 6M (Formula 17- 43-00)® , Basacote NK-MAX 9M (Formula 17-43-00)® and DuraTec Top 14 (Formula 14-07-14)® . The experiment was carried out between June 2015 and November 2016, in the field, at the Santa Terezinha farm, Caliman Agrícola S. A., in Linhares, Espírito Santo state. It adopted the random block design with six replicates and five treatments. The treatments consisted of the application of doses of 25, 50, 75 and 100 g cova-1 of controlled release fertilizers Basacote P-MAX 6M® in the planting and ix a control that was the drip fertigation. In the production phase, treatments consisted of cover fertilization by applying two controlled release fertilizers, Basacote NK-MAX 9M® and Duratec Top 14® , at 3, 6, 9 and 12 months after planting. They were evaluated at flowering stem diameter (SD), the first flower insertion height, plant height (PH), leaf petiole length, number of leaves per plant and percentage of pit defined for sex; in the production phase it was evaluated SD, PH, number of marketable fruits, fruit mass, soluble solids and inner fruit firmness at 8, 13 and 17 months after planting; productivity was assessed by cumulative production, from 8 to 17 months. The new technology package is an alternative to fertigation, and Basacote P-MAX 6M® controlled release fertilizer can be applied to 25 g cova-1 at planting, and cover fertilization with Basacote NK-MAX 9M® and Duratec Top 14® after 90 days of planting.