Leaf area estimation from linear measurements in different ages of Crotalaria juncea plants
An. acad. bras. ciênc
;
89(3): 1851-1868, July-Sept. 2017. tab, graf
Artigo
em Inglês
| LILACS
| ID: biblio-886743
ABSTRACT
ABSTRACT The goal of this study was to estimate the leaf area of Crotalaria juncea according to the linear dimensions of leaves from different ages. Two experiments were conducted with C. juncea cultivar IAC-KR1, in the 2014/2015 sowing seasons. At 59, 82, 102, 129 days after sowing (DAS) of the first and 61, 80, 92, 104 DAS of the second experiment, 500 leaves were collected, totaling 4,000 leaves. In each leaf, the linear dimensions were measured (length, width, length/width ratio and length × width product) and the specific leaf area was determined through Digimizer and Sigma Scan Pro software, after scanning images. Then, 3,200 leaves were randomly separated to generate mathematical models of leaf area (Y) in function of linear dimension (x), and 800 leaves for the models validation. In C. juncea, the leaf areas determined by Digimizer and Sigma Scan Pro software are identical. The estimation models of leaf area as a function of length × width product showed superior adjustments to those obtained based on the evaluation of only one linear dimension. The linear model Ŷ=0.7390x (R2=0.9849) of the real leaf area (Y) as a function of length × width product (x) is adequate to estimate the C. juncea leaf area.
Texto completo:
DisponíveL
Índice:
LILACS (Américas)
Assunto principal:
Folhas de Planta
/
Crotalaria
País/Região como assunto:
América do Sul
/
Brasil
Idioma:
Inglês
Revista:
An. acad. bras. ciênc
Assunto da revista:
Ciência
Ano de publicação:
2017
Tipo de documento:
Artigo
País de afiliação:
Brasil
Instituição/País de afiliação:
Universidade Federal de Pelotas/BR
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