Dimensionamento amostral e determinação do tamanho ótimo de parcelas para avaliação de mudas de berinjela e jiló
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Data
2017-07-18
Autores
Hell, Leonardo Raasch
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Universidade Federal do Espírito Santo
Resumo
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.
Descrição
Palavras-chave
Solanum melongena , Solanum gilo , Plot , Unidade experimental , Sampling , Amostragem , Experimental accuracy , Precisão experimental
Citação
HELL, Leonardo Raasch. Dimensionamento amostral e determinação do tamanho ótimo de parcelas para avaliação de mudas de berinjela e jiló. 2017. 31 f. Dissertação (Mestrado em Agricultura Tropical) - Programa de Pós-Graduação em Agricultura Tropical, Universidade Federal do Espírito Santo, São Mateus, 2017.