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首页> 外文期刊>Acta Horticulturae >Assessing petiole iron content in Vitis vinifera 'Chardonnay' using reflectance based hyperspectral indices.
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Assessing petiole iron content in Vitis vinifera 'Chardonnay' using reflectance based hyperspectral indices.

机译：使用基于反射的高光谱指数评估葡萄“霞多丽”中的叶柄铁含量。

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摘要

Iron chlorosis is a relevant nutritional disorder in vineyards grown in the Mediterranean area, which affects both berry yield and quality. Reflectance based remote sensing techniques might provide a valuable tool to characterize iron chlorosis incidence through the assessment of chlorophyll content. The study was conducted in ten vineyards (Vitis vinifera 'Chardonnay') to test the capability of reflectance based chlorophyll indices at assessing petiole iron content. Significant relationships emerged between petiole Fe concentration and reflectance based chlorophyll indices. Among the chlorophyll indices tested, the modified Normalized Difference 705 (mND705) and the modified Simple Ratio 705 (mSR705) were found to be significantly related (p<0.01) to petiole iron concentration with r2=0.82 and r2=0.72, respectively. In addition, the Chlorophyll Normalized Difference Index was also significantly related to petiole iron concentration although in a lesser extent (r2=0.53, p<0.05). The results obtained suggest that narrow-band chlorophyll indices derived from canopy reflectance might provide a useful tool to assess petiole iron concentration in 'Chardonnay' vineyards.
机译：铁质萎黄病是地中海地区生长的葡萄园中的一种相关营养失调，既影响浆果产量又影响质量。基于反射的遥感技术可能会提供一个有价值的工具，通过评估叶绿素含量来表征铁中毒的发病率。该研究在十个葡萄园（Vitis vinifera'Chardonnay'）中进行，以测试基于叶绿素指数的反射率评估叶柄铁含量的能力。叶柄中铁的浓度与基于反射率的叶绿素指数之间存在重要关系。在测试的叶绿素指数中，修改后的标准化差异705（mND 705 ）和修改后的简单比率705（mSR 705 ）之间存在显着相关性（p <0.01） r 2 = 0.82和r 2 = 0.72的叶柄铁浓度。此外，叶绿素标准化差异指数也与叶柄铁浓度显着相关，尽管程度较小（r 2 = 0.53，p <0.05）。获得的结果表明，来自冠层反射率的窄带叶绿素指数可能为评估“霞多丽”葡萄园的叶柄铁浓度提供了有用的工具。

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