caa a22 4500 445864338 CHVBK 20180317145453.0 cr unu---uuuuu 170323e20110201xx s 000 0 eng 10.1007/s11119-010-9159-4 doi (NATIONALLICENCE)springer-10.1007/s11119-010-9159-4 Within-season temporal variation in correlations between vineyard canopy and winegrape composition and yield [Elektronische Daten] [Andrew Hall, David Lamb, Bruno Holzapfel, John Louis] Remote optical imaging can rapidly acquire information describing spatial variability in vineyard block performance. Canopy characteristics were derived from very high spatial resolution (0.25m) optical imagery of a Cabernet Sauvignon vineyard acquired at various canopy growth stages. Within-season changes to correlation coefficients between vineyard canopy and ultimate composition and yield of harvested fruit were then investigated. Canopy area and density were observed to have significant relationships with yield and fruit quality indicators including berry size, anthocyanins and total phenolic content, but less significant relationships with total soluble solids. The strength and type of correlation varied with canopy growth stage. For anthocyanins and total phenolic content, correlations varied from non-significant before flowering to negative after flowering. For berry weight and yield, correlations varied from negative before flowering to positive after flowering. For total soluble solids, there were some significant relationships but no clear temporal pattern. The results confirm that remote sensing is a useful tool to determine spatial variability in fruit composition and yield. However, both the timing of image acquisition and the way in which canopy is quantified are important determinants of the direction and strength of correlations with fruit composition and yield. Springer Science+Business Media, LLC, 2010 Precision viticulture nationallicence Remote sensing nationallicence Fruit quality nationallicence Yield nationallicence Canopy nationallicence Phenology nationallicence CA : Grapevine canopy area nationallicence CD : Grapevine canopy density nationallicence NDVI : Normalised difference vegetation index nationallicence PAB : Photosynthetically active biomass nationallicence r : Coefficient of correlation nationallicence r 2 : Coefficient of determination nationallicence TSS : Total soluble solids nationallicence Hall Andrew National Wine and Grape Industry Centre, Charles Sturt University, Locked Bag 588, 2678, Wagga Wagga, NSW, Australia aut Lamb David Precision Agriculture Research Group, School of Science and Technology, University of New England, 2351, Armidale, NSW, Australia aut Holzapfel Bruno National Wine and Grape Industry Centre, Charles Sturt University, Locked Bag 588, 2678, Wagga Wagga, NSW, Australia aut Louis John National Wine and Grape Industry Centre, Charles Sturt University, Locked Bag 588, 2678, Wagga Wagga, NSW, Australia aut Precision Agriculture Springer US; http://www.springer-ny.com 12/1(2011-02-01), 103-117 1385-2256 12:1<103 2011 12 11119 https://doi.org/10.1007/s11119-010-9159-4 text/html Onlinezugriff via DOI 1 research-article jats NATIONALLICENCE 856 40 https://doi.org/10.1007/s11119-010-9159-4 text/html Onlinezugriff via DOI NATIONALLICENCE 700 1- Hall Andrew National Wine and Grape Industry Centre, Charles Sturt University, Locked Bag 588, 2678, Wagga Wagga, NSW, Australia aut NATIONALLICENCE 700 1- Lamb David Precision Agriculture Research Group, School of Science and Technology, University of New England, 2351, Armidale, NSW, Australia aut NATIONALLICENCE 700 1- Holzapfel Bruno National Wine and Grape Industry Centre, Charles Sturt University, Locked Bag 588, 2678, Wagga Wagga, NSW, Australia aut NATIONALLICENCE 700 1- Louis John National Wine and Grape Industry Centre, Charles Sturt University, Locked Bag 588, 2678, Wagga Wagga, NSW, Australia aut NATIONALLICENCE 773 0- Precision Agriculture Springer US; http://www.springer-ny.com 12/1(2011-02-01), 103-117 1385-2256 12:1<103 2011 12 11119 Metadata rights reserved Springer special CC-BY-NC licence nationallicence BK010053 XK010053 XK010000 NATIONALLICENCE NATIONALLICENCE NL-springer