SAMPLE SIZE AND LINEAR RELATIONS IN TRAITS OF CUT AND GRAZING SORGHUM

Authors

DOI:

https://doi.org/10.18512/rbms2022v21e1279

Abstract

The objectives of this work were to determine the sample size (number of plants) needed to estimate the mean of cut and grazing sorghum (Sorghum bicolor (L.) Moench), Nutribem cultivar, traits and investigate the linear relations among traits. At 86 days after sowing, 110 plants of sorghum were selected at random. The traits evaluated for each plant were: plant height, stem diameter, number of nodes, number of leaves, leaf fresh matter, stem fresh matter, shoot fresh matter, leaf dry matter, stem dry matter, and shoot dry matter. The sample size was determined to estimate the means of the traits, assuming estimation errors equal to 1% (higher precision), 2%, ..., and 20% (lower precision) of the mean. Scatter plots, correlation analysis, and path analysis investigated the relationship among traits. Fourteen plants were needed to estimate the means of plant height, stem diameter, number of nodes, and number of cut and grazing sorghum leaves, with a maximum error of 10% of the mean and a 95% confidence level. With the same precision, to estimate the means of leaf, stem, and shoot fresh and dry matter, 48 plants are needed. Plant height positively correlates with stem and shoots fresh and dry matter. The number of leaves has a positive linear relation with leaf fresh and dry matter.

Author Biographies

ALBERTO CARGNELUTTI FILHO, ​Universidade Federal de Santa Maria

Alberto Cargnelutti Filho concluiu o doutorado em Agronomia pela Universidade Federal de Santa Maria em 2002. Atualmente é Professor Adjunto IV do Departamento de Fitotecnia da Universidade Federal de Santa Maria. Atua na área de Estatística Experimental, com ênfase em Técnicas Experimentais, Planejamento de Experimentos, Biometria aplicada ao Melhoramento Genética Vegetal e Amostragem. Em seu currículo Lattes os termos mais frequentes na contextualização da produção científica, tecnológica e artístico-cultural são: Zea mays L., avaliação de cultivares, precisão experimental, probabilidade, tamanho de amostra.

VALÉRIA ESCAIO BUBANS, ​Universidade Federal de Santa Maria

Programa de Pós-Graduação em Agronomia da Universidade Federal de Santa Maria

LUCAS FILLIPIN OSMARI, ​Universidade Federal de Santa Maria

Discente do Curso de Graduação em Agronomia

FELIPE MANFIO SOMAVILLA, Universidade Federal de Santa Maria

Discente do Curso de Graduação em Agronomia

VITHÓRIA MORENA ORTIZ, Universidade Federal de Santa Maria

Discente do Curso de Graduação em Agronomia

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Published

2023-02-08

How to Cite

CARGNELUTTI FILHO, A., BUBANS, V. E., FILLIPIN OSMARI, L., MANFIO SOMAVILLA, F., & MORENA ORTIZ, V. (2023). SAMPLE SIZE AND LINEAR RELATIONS IN TRAITS OF CUT AND GRAZING SORGHUM. REVISTA BRASILEIRA DE MILHO E SORGO, 21. https://doi.org/10.18512/rbms2022v21e1279

Issue

Vol. 21 (2022)

Section

Scientific Paper

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