文章基本信息

标题：Leaf area estimation in Jatropha curcas (L.): an update
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作者：Marcos André dos Santos ; Alfredo Jarma-Orozco ; Flavio Lozano-Isla 等
期刊名称：AIMS Environmental Science
印刷版ISSN：2372-0344
电子版ISSN：2372-0352
出版年度：2018
卷号：5
期号：5
页码：353-371
DOI：10.3934/environsci.2018.5.353
摘要：We aimed to propose a reliable and accurate model using non-destructive measurements of leaf length (L) and/or width (W) for estimating leaf area (LA) of three genotypes of purging nut ( Jatropha curcas L.), i.e. Astrea and Barranca , both Colombian and a Mexican genotype. For model construction, ~500 healthy leaves were collected from at least 20 healthy plants naturally grown at each locations, and encompassed the full spectrum of measurable leaf sizes. Equations with L and/or W were generated; however, the best fit were made when product between L and W (LW). To validate these models, independent data set of 450 leaves were used. Thus, we developed a single model ( Yi = β0 * LWβ1) with high precision and accuracy, random dispersion pattern of residuals and unbiased. In spite of this, a single equation, joining all the studied genotypes, was developed [LA = 0.822 * (LW)0.983; standard errors: β0 = 0.020, β1 = 0.004; R2a = 0.976], which greatly simplifies the process of measuring the leaf area of the genotypes, a fact that should be highlighted.
关键词：purging nut; estimate model; leaf length; leaf width; reevaluation