Leaf area prediction models for Zinnia elegans Jacq., Zinnia haageana regel and 'profusion cherry'

Scientia Agricola

Ana Christina Rossini Pinto²  Teresinha De Jesus Deléo Rodrigues²  José Carlos Barbosa¹  Izabel Cristina Leite² 

[1] ,UNESP FCAV Depto. de Biologia Aplicada à AgropecuáriaJaboticabal SP ,Brasil

关键词: floriculture;    potted plants;    linear regression;    floricultura;    plantas envasadas;    regressão linear;   

DOI  :  10.1590/S0103-90162004000100009

来源: SciELO

【 摘 要 】

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.

【 授权许可】

CC BY   
 All the contents of this journal, except where otherwise noted, is licensed under a Creative Commons Attribution License