Optimal plot size for cabbage experiments

Authors

DOI:

https://doi.org/10.33448/rsd-v9i11.9744

Keywords:

Brassica oleracea L. var. capitata L.; experimental planning; Hatheway; maximum curvature; maximum curvature of the coefficient of variation; plateau regression.

Abstract

Among the factors that influence the detection of minimum significant differences between treatments in conventional experiments is the size of the plot, whose correct determination allows the reduction of experimental error, consequently, increases the precision of the experiment and the reliability of the interpretations and conclusions obtained. There are different methods to estimate the optimal plot size, which relate plot size and residual variation, highlighting among these the methods of maximum curvature, maximum modified curvature, maximum curvature of the coefficient of variation and regression with plateau response. In addition to these, there is the Hatheway method that takes into account factors such as number of treatments, repetitions and levels of significance. Since there is little work to estimate the optimal plot size in experiments with species of the genus Brassica, the present study aimed to increase the experimental precision in experiments with cabbage in the municipality of Alegre - ES by determining the optimal plot size with based on Hatheway's methods, maximum curvature, maximum curvature of the coefficient of variation and plateau regression. The work was carried out by means of a blank test carried out in the experimental area of the Center for Agricultural Sciences of the Federal University of Espírito Santo, Alegre - ES, in which both productive and growth variables were evaluated. At the end of the project, propose the optimal plot size to be used in experiments with cabbage in order to increase the experimental precision and the reliability of the results obtained in future experiments.

References

Haesbaert, FM, Santos, D, Lúcio, AD, Benz, V.; Antonello, B. I. & Ribeiro, A. L. P. (2011). Tamanho de amostra para experimentos com feijão-de-vagem em diferentes ambientes. Ciência Rural, 41, 38-44.

Hatheway, W H. (1961). Convenient plot size. Agronomy Journal, 53 (4), 279-280.

Henriques Neto, D.; Sedyama, T.; Souza, M. A.; Leite, L. F. C. & BLANCO, F. F. (2009). Tamanho de parcela para a avaliação da produção em trigo irrigado, sob dois sistemas de plantio. Revista Ciência Agronômica, 40 (1), 86-93.

Lessman, K. J. & ATKINS, R. E. (1963). Optimum plot size andrelative efficiencyflattice designs for grain sorghum yieldtests. Crop Science, 3 (5), 477-481.

Lin, C. S. & Binns, M. R. (1986). Relative efficiency of randomized block design having different plot size and number of replications and plots per block. Agronomy Journal, 78, 531-534.

Lúcio, A. D.; Carpes, R. H.; Storck, L.; Lopes, S. J.; Lorentz, L. H. & Paludo, A. L. (2008). Variância e média da massa de frutos de abobrinha-italiana em múltiplas colheitas. Horticultura Brasileira, 26, 335-341.

Lúcio, A. D.; Haesbaert, F. M.; Santos, D.; Schwertner, D. V. & Brunes, R. R. (2012). Tamanhos de amostra e de parcela para variáveis de crescimento e produtivas do tomateiro. Horticultura Brasileira, 30, 660-668.

Lúcio, A. D.; Souza, M. F.; Heldwein, A. B.; Lieberknecht, D.; Carpes, R. H. & Carvalho, M. P. (2003). Tamanho da amostra e método de amostragem para a avaliação de características do pimentão em estufa plástica. Horticultura Brasileira, 21, 180-184.

Meier, V. D. & Lessman, K. J. (1971). Estimation of optimum field plot shape and size for testing yield in Crambea byssinica Hochst. Crop Science, 11 (5), 648-650.

Oliveira, G. M. V.; Mello, J. M.; Lima, R. R.; Scolforo, J. R. S. & Oliveira, A. D. (2011). Tamanho e forma de parcelas experimentais para Eremanthus erythropappus. Cerne, 17 (3), 327-338.

Paranaíba, P. F.; Ferreira, D. F. & Morais A. R. (2009b). Tamanho ótimo de parcelas experimentais: proposição de métodos de estimação. Revista Brasileira de Biometria, 27, 255-268.

Paranaíba, P. F.; Morais, A. R. & Ferreira, D. F. (2009a). Tamanho ótimo de parcelas experimentais: comparação de métodos em experimentos de trigo e mandioca. Revista Brasileira de Biometria, 27, 81-90.

Silva, L.F.O.; Campos, K.A.; Morais, A.R.; Cogo, F.D. & Zambon, C.R. (2012). Tamanho ótimo de parcela para experimentos com rabanete. Revista Ceres, 59 (5), 624-629.

Smith, H.F. (1938). An empirical law describing heterogeneity in theyields of agricultural crops. Journal of Agricultural Science, 28, 1-23.

Downloads

Published

12/11/2020

How to Cite

Mateus, V. . de F. ., Rodriguês Moreira, G. ., Euclides Pechara da Costa Jaeggi, M. ., Sales Rocha, R. ., Guarnier da Silva, R. de K., Martins Pereira, I. ., Oliveira, T. . R. A. de, Cruz, D. P. da ., Blunck Rezende Moreira, T., Bastos dos Santos Oliveira, W. ., Gonçalves da Rocha, J. ., de Castro Monteiro, E. ., Gomes de Souza, A., Queiroz da Silva Sanfim de Sant’Anna, C. ., de Amaral Gravina, G. ., Figueiredo Daher, R. ., Rangel Rodrigues, R., do Carmo Parajara, M. ., Nogueira Batista, J. ., & de Araújo Capetini, S. . (2020). Optimal plot size for cabbage experiments. Research, Society and Development, 9(11), e2239119744. https://doi.org/10.33448/rsd-v9i11.9744

Issue

Section

Agrarian and Biological Sciences