Data/hora: 11/06/2024 16:00:53

Provedor de dados: | 63
País: | Brazil
Título: | Leaf area prediction models for Zinnia elegans Jacq., Zinnia haageana regel and 'profusion cherry'
Autores: | Pinto,Ana Christina Rossini; Rodrigues,Teresinha de Jesus Deléo; Barbosa,José Carlos; Leite,Izabel Cristina.
Data: | 2004-02-01
Ano: | 2004
Palavras-chave: | Floriculture; Potted plants; Linear regression.
Resumo: | Leaf area measurements are of value in physiological and agronomic studies. The use of prediction models to estimate leaf area is a simple, accurate and nondestructive method. The present work suggests leaf area prediction models for Zinnia elegans ('Liliput' and 'Thumbelina'), Z. haageana ('Carpet Persa') and Z. elegans x Z. angustifolia ('Profusion Cherry'), potential flower potplant cultivars. At the stages of visible apical flower bud and flowering, 250 and 300 leaves were collected from greenhouse grown plants, respectively, at each season (fall, winter, spring and summer), totaling 1,000 and 1,200 leaves, for each developmental stage. The maximum length (L), maximum width (W) and real leaf area (RLA) were measured with a Digital Image Analysis System - Delta T Devices. The relation between RLA and the product of length by width (LW), was studied through linear models, for each cultivar, at each developmental stage. The models for the flower bud stage were: RLA = 0.0009 + 0.7765 LW ('Profusion Cherry'), RLA = 0.0021 + 0.8156 LW ('Thumbelina'), RLA = 0.0031 + 0.8003 LW ('Liliput'), RLA = 0.0036 + 0.7719 LW ('Carpet Persa'), and for flowering stage: RLA = 0.0029 + 0.7899 LW ('Profusion Cherry'), RLA = 0.8318 LW ('Thumbelina'), RLA = 0.001 + 0.8417 LW ('Liliput'), RLA = 0.0042 + 0.723 LW ('Carpet Persa'). Models were considered adequate to estimate leaf area.
Tipo: | Info:eu-repo/semantics/article
Idioma: | Inglês
Identificador: | http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0103-90162004000100009
Editor: | São Paulo - Escola Superior de Agricultura "Luiz de Queiroz"
Relação: | 10.1590/S0103-90162004000100009
Formato: | text/html
Fonte: | Scientia Agricola  v.61 n.1 2004
Fonte: | info:eu-repo/semantics/openAccess