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Technical Brief

Indirect Estimation of Leaf Area Index in VSP-Trained Grapevines Using Plant Area Index

Johanna Döring, Manfred Stoll, Randolf Kauer, Matthias Frisch, Susanne Tittmann
Am J Enol Vitic.  2014  65: 153-158  ; DOI: 10.5344/ajev.2013.13073
Johanna Döring
1Hochschule Geisenheim University (HGU), Department of General and Organic Viticulture, Von-Lade-Str. 1, 65366 Geisenheim, Germany
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  • For correspondence: Johanna.Doering@hs-gm.de
Manfred Stoll
1Hochschule Geisenheim University (HGU), Department of General and Organic Viticulture, Von-Lade-Str. 1, 65366 Geisenheim, Germany
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Randolf Kauer
1Hochschule Geisenheim University (HGU), Department of General and Organic Viticulture, Von-Lade-Str. 1, 65366 Geisenheim, Germany
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Matthias Frisch
2Justus Liebig University, Institute of Agronomy and Plant Breeding II, Heinrich-Buff-Ring 26, 35392 Giessen, Germany
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Susanne Tittmann
1Hochschule Geisenheim University (HGU), Department of General and Organic Viticulture, Von-Lade-Str. 1, 65366 Geisenheim, Germany
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Abstract

Leaf area index (LAI) and canopy structure are important parameters affecting grape quality and yield of grapevines. Two different experimental protocols as well as the average LAI value of the different protocols for indirect estimation of LAI by gap fraction analysis in VSP-trained grapevines (Vitis vinifera L. cv. Riesling) were tested in this study using plant area index (PAI). Measurements were performed using a plant canopy analyzer. Directly measured LAI and estimated PAI were compared. Protocol SFC (sensor facing the canopy) gave accurate estimates of LAI by measuring PAI along a diagonal transect including eight vines on each side. The correlation between directly measured LAI and estimated PAI was very high (R2 = 0.93) and the root mean square error was lowest of the methods tested here (RMSE = 0.21). Eight measurements below the canopy were enough to accurately estimate LAI. By applying the empirical calibration equation, the measurements provide accurate LAI estimates. Nevertheless, local calibration is required. The method presented provides a useful tool for rapid and precise LAI estimation in VSP training systems and for supporting canopy or management decisions based on LAI.

  • leaf area
  • leaf area index
  • plant area index
  • gap fraction analysis
  • grapevine
  • ©2014 by the American Society for Enology and Viticulture
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You have accessRestricted access
Indirect Estimation of Leaf Area Index in VSP-Trained Grapevines Using Plant Area Index
Johanna Döring, Manfred Stoll, Randolf Kauer, Matthias Frisch, Susanne Tittmann
Am J Enol Vitic.  2014  65: 153-158  ; DOI: 10.5344/ajev.2013.13073
Johanna Döring
1Hochschule Geisenheim University (HGU), Department of General and Organic Viticulture, Von-Lade-Str. 1, 65366 Geisenheim, Germany
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  • For correspondence: Johanna.Doering@hs-gm.de
Manfred Stoll
1Hochschule Geisenheim University (HGU), Department of General and Organic Viticulture, Von-Lade-Str. 1, 65366 Geisenheim, Germany
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Randolf Kauer
1Hochschule Geisenheim University (HGU), Department of General and Organic Viticulture, Von-Lade-Str. 1, 65366 Geisenheim, Germany
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Matthias Frisch
2Justus Liebig University, Institute of Agronomy and Plant Breeding II, Heinrich-Buff-Ring 26, 35392 Giessen, Germany
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Susanne Tittmann
1Hochschule Geisenheim University (HGU), Department of General and Organic Viticulture, Von-Lade-Str. 1, 65366 Geisenheim, Germany
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You have accessRestricted access
Indirect Estimation of Leaf Area Index in VSP-Trained Grapevines Using Plant Area Index
Johanna Döring, Manfred Stoll, Randolf Kauer, Matthias Frisch, Susanne Tittmann
Am J Enol Vitic.  2014  65: 153-158  ; DOI: 10.5344/ajev.2013.13073
Johanna Döring
1Hochschule Geisenheim University (HGU), Department of General and Organic Viticulture, Von-Lade-Str. 1, 65366 Geisenheim, Germany
  • Find this author on Google Scholar
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  • For correspondence: Johanna.Doering@hs-gm.de
Manfred Stoll
1Hochschule Geisenheim University (HGU), Department of General and Organic Viticulture, Von-Lade-Str. 1, 65366 Geisenheim, Germany
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Randolf Kauer
1Hochschule Geisenheim University (HGU), Department of General and Organic Viticulture, Von-Lade-Str. 1, 65366 Geisenheim, Germany
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Matthias Frisch
2Justus Liebig University, Institute of Agronomy and Plant Breeding II, Heinrich-Buff-Ring 26, 35392 Giessen, Germany
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Susanne Tittmann
1Hochschule Geisenheim University (HGU), Department of General and Organic Viticulture, Von-Lade-Str. 1, 65366 Geisenheim, Germany
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