Tamanho ótimo de parcela para a cultura do feijão-vagem

Abstract

Resumo -Com o objetivo de estimar o tamanho ótimo de parcela e de verificar o comportamento da precisão experimental em diferentes tamanhos de parcela e formas de considerar a produção de feijão-vagem, foram conduzidos os seguintes ensaios em branco: 1) em estufa no outono-inverno; 2) em túnel no outono-inverno; 3) em ambiente não protegido no outono-inverno; 4) em túnel na primavera-verão; e 5) em ambiente não protegido na primavera-verão. Foi mensurada a fitomassa fresca de vagens por duplas de plantas. Para as parcelas de diferentes tamanhos (X) foi estimada a variância e a sua relação com X. O tamanho ótimo de parcela foi estimado pelo método da máxima curvatura modificada, e as diferenças mínimas significativas entre médias, foram estimadas pelo método de Hatheway. Analisar a fitomassa fresca de vagens total reduz a variabilidade em experimentos com feijão-vagem e o tamanho ótimo da parcela recomendado para esta cultura é de 16 plantas para experimentos em estufa e de 12 plantas para experimentos em túneis e experimentos em ambientes não protegidos. Palavras-chave -Phaseolus vulgaris L. Ambiente protegido. Precisão experimental.Abstract -With the aim of estimating the optimum plot size and verify the behavior of the experimental precision in different plot sizes and shapes to consider the production of snap beans, the following white experiments were conducted: 1) in a greenhouse during the autumn and winter; 2) in a poly-tunnel during the autumn and winter; 3) in an unprotected environment during the autumn and winter; 4) in a poly-tunnel during the spring and summer; and 5) in an unprotected environment during the spring and summer. The fresh pod mass was measured for pairs of plants. For each different plot size (X) the variation and its relation to X was estimated. The optimum plot size was estimated using the method of maximum modified curvature, and the significant minimum differences between averages were estimated using the Hathaway method. Analyze the total fresh biomass of pods reduces variability in experiments with green beans and optimum plot size recommended for this crop is 16 plants in a greenhouse for experiments and plans for 12 tunnel experiments and experiments in non-protected.

Optimum plot size for experiments with the sunflower1

“…Table 4 shows values for the estimates of d in accordance with the pre-established conditions. Analysing this table, significant decreases can be seen in the values of d (gains in experimental precision) with increases in the size of small plots, although this increase in precision is small with additional increases in the area of plots over a certain size limit, agreeing with the results obtained by various authors (BRUM et al, 2008;DONATO et al, 2008;HENRIQUES NETO et al, 2004;LÚCIO et al, 2011;LÚCIO et al, 2012;MARTIN et al, 2004;;SANTOS et al, 2012).…”

Uniformity trial size in estimates of plot size in restrict areas

“…Some studies have been carried out to estimate plot size in the sweet pepper (LORENTZ; LÚCIO, 2009;LÚCIO et al, 2004), tomato (LÚCIO et al, 2010(LÚCIO et al, , 2012, lettuce (LÚCIO et al, 2011) and green bean (SANTOS et al, 2012). However, these studies were not concerned with investigating whether the sizes used in the uniformity trial were sufficient to accurately estimate the plot size.…”

Accuracy in the estimates of zucchini production related to the plot size and number of harvests

“…There are several papers defining the number of plants per plot in experiments with horticulture of multiple harvests (MELLO et al, 2004;LORENTZ et al, 2005;CARPES et al, 2010;LÚCIO et al 2010;SANTOS et al, 2012). However, there is a lack of papers that associate this size to the number of harvests that should be done so that there is a smaller variability in the production data collected and, consequently, greater experimental accuracy.…”