Leaf area estimation in some species of fruit tree by using models as a non-destructive method

Abstract

Leaf area estimation in some species of fruit tree by using models as a nondestructive method.Abstract --Introduction. Leaf area measurements are used commonly in the study of growth and development of fruit trees. These measurements can be made destructively by using a variety of sensitive instruments and/or non-destructively by using models of leaf area estimation. For models of leaf area estimation, some leaf parameters such as the length and width of leaves are usually used in the measurements. Construction of a model of leaf area estimation. Computer programs such as Excel, SAS and SPSS may be used in this process. In brief, after a leaf has been placed on a sheet of paper and photocopied, a digital planimeter or suitable tool may be used to measure the actual leaf area. The leaf width (W) and length (L) of the leaves sampled can be measured by a simple ruler. After this, regression analysis of the data may be performed separately for each genotype, species or cultivar. The analysis can be conducted with various subsets of the independent variables; for instance, leaf length (L), leaf width (W), L 2 , W 2 and [L 2 / W 2 ] to develop the best model for predicting leaf area. Regression analyses should be carried out until the deviation sum of squares is minimized. Models of leaf area estimation for specific crops. In our study, prediction models of leaf area were developed by referring to the relevant current literature that studied such fruits as avocado, banana, blackberry, cacao, cherry, chestnut, grape, guava, kiwifruit, lotus plum, peach, pistachio, rabbiteye blueberry, red currant, red raspberry, sour orange, strawberry, pecan and white mulberry. Advantages and disadvantage of the models of leaf area estimation. Some advantages and a disadvantage of models of leaf area estimation are presented. Conclusion. Our mini-review has shown that the models which have been formulated and which will develop in the future for some fruit species can be reliably used.Turkey / fruit-growing / models / forecasting / leaf area / methods / measurement / evaluation Évaluation non destructive de la surface foliaire de certaines espèces fruitières à l'aide de modèles.Résumé --Introduction. Des mesures de la surface foliaire sont généralement utilisées pour étudier la croissance et le développement des arbres fruitiers. Ces mesures peuvent utiliser des instruments de précision et être destructives et/ou utiliser des modèles permettant l'évaluation de la surface foliaire et être non destructives. Pour ce type de modèle, certains paramètres de la feuille comme la longueur et la largeur des feuilles sont habituellement considérés. Construction d'un modèle d'éva-luation de la surface foliaire. Des programmes informatiques tels qu'Excel, SAS ou SPSS peuvent être utilisés dans ce contexte. Brièvement, après qu'une feuille ait été placée sur du papier et photocopiée, un planimètre numérique ou un autre outil approprié peut être utilisé pour mesurer la surface réelle de la feuille. La largeur de feuille (L) et la longueur (l) des fe...

Models for leaf area estimation in dwarf pigeon pea by leaf dimensions

“…In this method there is no need of acquisition and use of expensive equipment and, especially, the leaf destruction (Peksen 2007;Demirsoy 2009;Rouphael et al 2010).…”

A simple and non-destructive model for individual leaf area estimation in citrus

“…The main advantages of reliable models for estimating leaf area are the preservation of the canopy because of the possible utilization of the same leaves through equations [8], the lack of expensive equipment and labor, and the ease and rapidity in getting final results [6,9]. In fact, the utilization of regression equations for estimating leaf area through simple measurements of leaf dimensions is an inexpensive, easy, rapid, accurate and non-destructive alternative for assessing general plant leaf area in the field [5,9].…”

“…In fact, the utilization of regression equations for estimating leaf area through simple measurements of leaf dimensions is an inexpensive, easy, rapid, accurate and non-destructive alternative for assessing general plant leaf area in the field [5,9]. However, any proposed model should be validated with different leaf samples before using it for other experiments [6], as the accuracy of the prediction is dependent on the variation of leaf shape amongst species or cultivars [10].…”

“…Leaf area estimation may be improved by using multiple regressions with leaf length and width, dimensions that are closely related to the leaf area. Furthermore, a representative leaf sample, consisting of leaves of different sizes, should be used in order to increase the reliability of the model [6,7].…”

Method for estimating leaf coverage in strawberry plants using digital image processing

“…The work presented by Córcoles et al (2013) presents the option of automate this task, monitoring with drones, and GPS incorporated system with mission routes covering the strawberry plants area, especially if cultivated in the field (Xiang & Tian, 2011). In addition, it could help researches that requires the estimation of leaf coverage to study other abnormalities presents in plants through their leaflets (Demirsoy, 2009). Similarly, the algorithm meets the requirements for its portability on mobile devices, in accordance with current trends in technological consumption (Li, 2014).…”