Towards developing reliable models of leaf area on grapevines (Vitis vinifera L.)

Guisard, Y. and Birch, C. J. (2005). Towards developing reliable models of leaf area on grapevines (Vitis vinifera L.). In: G. Albagnac, V. Bellon-Maurel and S. Best, Information and Technology for Sustainable Fruit and Vegetable Production. 7th Fruit , Nut and Vegetable Production Engineering Symposium (FRUTIC 05), Montpellier, France, (). 12-16 September 2005.

Author Guisard, Y.
Birch, C. J.
Title of paper Towards developing reliable models of leaf area on grapevines (Vitis vinifera L.)
Conference name 7th Fruit , Nut and Vegetable Production Engineering Symposium (FRUTIC 05)
Conference location Montpellier, France
Conference dates 12-16 September 2005
Proceedings title Information and Technology for Sustainable Fruit and Vegetable Production
Place of Publication Montpellier, France
Publisher Cemagref
Publication Year 2005
Sub-type Fully published paper
Editor G. Albagnac
V. Bellon-Maurel
S. Best
Total pages 9
Collection year 2005
Language eng
Abstract/Summary A field study in three vineyards in southern Queensland (Australia) was carried out to develop predictive models for individual leaf area and shoot leaf area of two cultivars (Cabernet Sauvignon and Shiraz) of grapevines (Vitis Vinifera L.). Digital image analysis was used to measure leaf vein length and leaf area. Stepwise regressions of untransformed and transformed models consisting of up to six predictor variables for leaf area and three predictor variables for shoot leaf area were carried out to obtain the most efficient models. High correlation coefficients were found for log10 transformed individual leaf and shoot leaf area models. The significance of predictor variables in the models varied across vineyards and cultivars, demonstrating the discontinuous and heterogeneous nature of vineyards. The application of this work in a grapevine modeling environment and in a dynamic vineyard management context are discussed. Sample sizes for quantification of individual leaf areas and areas of leaves on shoots are proposed based on target margins of errors of sampled data.
Subjects E1
300302 Plant Growth and Development
620204 Grapes
Q-Index Code E1
Q-Index Status Provisional Code
Institutional Status UQ
Additional Notes Paper listed in Symposium program.

 
Versions
Version Filter Type
Citation counts: Google Scholar Search Google Scholar
Created: Thu, 23 Aug 2007, 20:37:51 EST