2010
DOI: 10.1590/s0103-90162010000400005
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Abstract: In order for sunflower cultivation to be economically sustainable, research should be based upon suitable experimental techniques. Since this kind of information is not readily available, the aim of this study was to estimate the seed production heterogeneity index and the optimal experimental plot size, and to verify experimental precision in sunflower experiments. Sunflower seed yield figures for plots of 1-meter rows (0.4 m spacing) were collected. The experiments were carried out in the 2004/05 and 2005/06… Show more

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Cited by 15 publications
(12 citation statements)
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“…Differences of around 15% can be detected with the use of plots of eight basic units (5.04 m 2 ), seven replications and 12 or more cultivars; using plots of ten basic units (6.30 m 2 ), seven replications and four or more cultivars; or twelve basic units (7.56 m 2 ), five replications and eight or more cultivars. Similar results were obtained by Lorentz et al (2010) who, with a sunflower crop, and using plots of 4.00 m 2 , with five replications and four treatments, obtained a value for d of 24.51%, very close to that obtained in this work of d = 23.61%, when using plots of 3.78 m 2 with the same number of replications and treatments.…”
Section: Resultssupporting
confidence: 89%
See 1 more Smart Citation
“…Differences of around 15% can be detected with the use of plots of eight basic units (5.04 m 2 ), seven replications and 12 or more cultivars; using plots of ten basic units (6.30 m 2 ), seven replications and four or more cultivars; or twelve basic units (7.56 m 2 ), five replications and eight or more cultivars. Similar results were obtained by Lorentz et al (2010) who, with a sunflower crop, and using plots of 4.00 m 2 , with five replications and four treatments, obtained a value for d of 24.51%, very close to that obtained in this work of d = 23.61%, when using plots of 3.78 m 2 with the same number of replications and treatments.…”
Section: Resultssupporting
confidence: 89%
“…This shows that there was some correlation between the basic units in the plot, which helped in the use of reasonably small plots, in this case of 4 (four) working basic units (2.52 m 2 ). This result agrees with that of Lorentz et al (2010) who An experiment conducted by Oliveira et al (2010) to evaluate the yield of sunflower cultivars, used plots with a working area of 8.64 m 2 . However, according to the results obtained in this study, the size for the plot could be significantly reduced without compromising the data being collected, since plot sizes with a working area of 2.52 m 2 proved wellsuited to the evaluation of grain yield in sunflower cultivars.…”
Section: Resultssupporting
confidence: 88%
“…Os tratamentos constaram dos híbridos triplos Olisun 3 e Olisun 5 (alto oleicos), híbridos simples Igrasol 827, Charrua, Aguará 3, Aguará 4 e Aguará 6 e híbrido simples modificado Igrasol 830. As parcelas foram dimensionadas com cinco metros de comprimento e oito fileiras de cultivo, espaçadas a 0,7 metros, situando acima do dimensionamento mínimo de parcelas na cultura do girassol (LORENTZ et al, 2010). O estande final foi de 45 mil plantas ha -1 , sendo as avaliações realizadas em 20 plantas na área útil da parcela.…”
Section: Methodsunclassified
“…A produtividade de grãos foi determinada no centro das parcelas (eliminando-se 1,0 m de bordadura, em todos os lados da parcela), em uma área útil de 7,2 m² (3,0 m x 2,4 m), atendendo, assim, ao tamanho ótimo de parcela para girassol (Lorentz et al 2010) e milho (Cargnelutti Filho et al 2011). Para ambas as culturas, a umidade dos grãos foi corrigida para 13% (Brasil 2009).…”
Section: Key-wordsunclassified