Models for estimating yacon leaf area

ABSTRACT The recent exploration of yacon demands scientific information for improving the crop production technology. This study aimed to set a leaf area estimate model for yacon plants, using non-destructive measurements of leaf length (L) and/or width (W). Sixty-four representative yacon plants were randomly selected in an experimental field during the full vegetative growth. One thousand leaves of various sizes were taken from those plants for setting and validating a model. The logarithmic model best fitted this purpose, the result of multiplying length by width being used as independent variable. Yacon leaf area can be determined with high precision and accuracy by LALW = (-27.7418 + (3.9812LW / ln LW ) , disregarding the leaf size.

摘要：当前针对雪莲果（yacon）的相关研究亟需科学依据以优化其作物生产技术。本研究以叶长（L）和/或叶宽（W）的非破坏性测量为手段，旨在构建雪莲果植株的叶面积估算模型。研究于营养生长旺盛期在试验田内随机选取64株具有代表性的雪莲果植株，从中采集1000片不同大小的叶片用于模型的构建与验证。结果表明，对数模型为该研究的最优拟合模型，以叶长与叶宽的乘积作为自变量。无需考虑叶片大小，通过公式LALW = -27.7418 + (3.9812LW / ln LW)即可实现雪莲果叶面积的高精密度与高准确度测定。