LAUSR.org creates dashboard-style pages of related content for over 1.5 million academic articles. Sign Up to like articles & get recommendations!

Plot size and number of replications for ryegrass experiments

Photo from wikipedia

portuguesOs objetivos deste trabalho foram determinar o tamanho otimo de parcela e o numero de repeticoes para avaliar a massa verde de azevem semeado a lanco. Foram conduzidos 20 ensaios… Click to show full abstract

portuguesOs objetivos deste trabalho foram determinar o tamanho otimo de parcela e o numero de repeticoes para avaliar a massa verde de azevem semeado a lanco. Foram conduzidos 20 ensaios de uniformidade, sendo cada ensaio composto por 16 unidades experimentais basicas (UEB) de 0,5 m2. Aos 117, 118 e 119 dias apos semeadura foi determinada a massa verde de azevem nas UEB de 5, 10 e 5 ensaios de uniformidade, respectivamente. Foi determinado o tamanho otimo de parcela pelo metodo da curvatura maxima do modelo do coeficiente de variacao. A seguir, foi determinado o numero de repeticoes em cenarios formados pelas combinacoes de i tratamentos (i = 3, 4, ..., 50) e d diferenca minima significativa do teste de Tukey a 5% de probabilidade, expressa em percentagem da media do experimento (d = 10%, 11%, ..., 20%). Conclui-se que o tamanho otimo de parcela para determinar a massa verde de azevem semeado a lanco e de 2,19m2 , com coeficiente de variacao de 9,79%. Para identificar como significativas a 5% de probabilidade pelo teste de Tukey, diferencas entre medias de tratamentos de 20%, o numero de repeticoes necessarias e de cinco, seis, sete e oito repeticoes, respectivamente, para experimentos com ate 5, 10, 20 e 50 tratamentos na cultura do azevem EnglishThe objective of this research was to determine the optimal plot size and the number of replications to evaluate the fresh matter of ryegrass sown to haul. Twenty uniformity trials were conducted, each trial with 16 basic experimental units (BEU) of 0.5 m2. At 117, 118 and 119 days after sowing, the fresh matter of ryegrass in the BEUs of 5, 10 and 5 uniformity trials, respectively, were determined. The optimal plot size was determined by the maximum curvature method of the variation coefficient model. Next, the replications number was determined in scenarios formed by combinations of i treatments (i = 3, 4, ... 50) and d minimum differences between means of treatments to be detected as significant at 5% of probability by the Tukey test, expressed in experimental mean percentage (d = 10, 11, ... 20%). The optimal plot size to determine the fresh matter of ryegrass seeded at the haul is 2.19 m2, with a variation coefficient of 9.79%. To identify as significant at 5% probability, by the Tukey test, differences between treatment means of 20%, are required five, six, seven and eight replications, respectively, in ryegrass experiments with up to 5, 10, 20 and 50 treatments

Keywords: number replications; plot size; size number; plot

Journal Title: Ciencia Rural
Year Published: 2020

Link to full text (if available)


Share on Social Media:                               Sign Up to like & get
recommendations!

Related content

More Information              News              Social Media              Video              Recommended



                Click one of the above tabs to view related content.