Characterising spatio-temporal variation in fruit composition for improved winegrowing management in California Cabernet Sauvignon

IF 2.5 3区农林科学 Q3 FOOD SCIENCE & TECHNOLOGY Australian Journal of Grape and Wine Research Pub Date : 2022-02-27 DOI:10.1111/ajgw.12542

B. Sams, R.G.V. Bramley, L. Sanchez, N.K. Dokoozlian, C.M. Ford, V. Pagay

{"title":"Characterising spatio-temporal variation in fruit composition for improved winegrowing management in California Cabernet Sauvignon","authors":"B. Sams, R.G.V. Bramley, L. Sanchez, N.K. Dokoozlian, C.M. Ford, V. Pagay","doi":"10.1111/ajgw.12542","DOIUrl":null,"url":null,"abstract":"<div>\n \n \n <section>\n \n <h3> Background and Aims</h3>\n \n <p>Spatial variability in yield and fruit composition in winegrape vineyards has been demonstrated, but few chemical compounds responsible for impacting wine composition have been analysed at a sample density high enough to compare with variability in remotely sensed imagery. The aims of this project were to evaluate spatial variability in grape composition at harvest in three seasons and to compare this with remotely sensed canopy vegetation data to assess its utility in underpinning targeted management.</p>\n </section>\n \n <section>\n \n <h3> Methods and Results</h3>\n \n <p>The composition of fruit samples were analysed to compare their spatial variability with aerial imagery products, the normalised difference vegetation index (NDVI) and the difference between canopy temperature from imagery (<i>T</i><sub>c</sub>) and ambient temperature from ground weather stations (<i>T</i><sub>a</sub>), (<i>T</i><sub>c</sub> − <i>T</i><sub>a</sub>). Zonal discrimination of fruit composition using <i>k-</i>means clusters generated from seasonal aerial imagery showed a difference as high as 2.7 kg/m in vine yield<sub>,</sub> up to 0.3 mg/g anthocyanins and 1.2 pg/g carbon-6 alcohols and aldehydes (C6) with these ‘quality zones’ reflected by the imagery in some vineyards and/or seasons.</p>\n </section>\n \n <section>\n \n <h3> Conclusions</h3>\n \n <p>The NDVI and (<i>T</i><sub>c</sub> − <i>T</i><sub>a</sub>) data collected at multiple time points were correlated with several attributes of fruit composition evaluated at harvest, but most correlations peaked at veraison. They were also strongest in vineyards in which the spatial variation showed stronger spatial structure.</p>\n </section>\n \n <section>\n \n <h3> Significance of the Study</h3>\n \n <p>Spatial variations in berry chemistry followed similar patterns to those seen in aerial imagery of vineyards with structured vigour zones. Furthermore, as most of the spatial structure in the variation of fruit composition is dominated by flavanols, opportunities for reduced analytical costs in winery laboratories also arise.</p>\n </section>\n </div>","PeriodicalId":8582,"journal":{"name":"Australian Journal of Grape and Wine Research","volume":"28 3","pages":"407-423"},"PeriodicalIF":2.5000,"publicationDate":"2022-02-27","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://onlinelibrary.wiley.com/doi/epdf/10.1111/ajgw.12542","citationCount":"4","resultStr":null,"platform":"Semanticscholar","paperid":null,"PeriodicalName":"Australian Journal of Grape and Wine Research","FirstCategoryId":"97","ListUrlMain":"https://onlinelibrary.wiley.com/doi/10.1111/ajgw.12542","RegionNum":3,"RegionCategory":"农林科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":null,"EPubDate":"","PubModel":"","JCR":"Q3","JCRName":"FOOD SCIENCE & TECHNOLOGY","Score":null,"Total":0}

引用次数: 4

Abstract

Background and Aims

Spatial variability in yield and fruit composition in winegrape vineyards has been demonstrated, but few chemical compounds responsible for impacting wine composition have been analysed at a sample density high enough to compare with variability in remotely sensed imagery. The aims of this project were to evaluate spatial variability in grape composition at harvest in three seasons and to compare this with remotely sensed canopy vegetation data to assess its utility in underpinning targeted management.

Methods and Results

The composition of fruit samples were analysed to compare their spatial variability with aerial imagery products, the normalised difference vegetation index (NDVI) and the difference between canopy temperature from imagery (T_c) and ambient temperature from ground weather stations (T_a), (T_c − T_a). Zonal discrimination of fruit composition using k-means clusters generated from seasonal aerial imagery showed a difference as high as 2.7 kg/m in vine yield_, up to 0.3 mg/g anthocyanins and 1.2 pg/g carbon-6 alcohols and aldehydes (C6) with these ‘quality zones’ reflected by the imagery in some vineyards and/or seasons.

Conclusions

The NDVI and (T_c − T_a) data collected at multiple time points were correlated with several attributes of fruit composition evaluated at harvest, but most correlations peaked at veraison. They were also strongest in vineyards in which the spatial variation showed stronger spatial structure.

Significance of the Study

Spatial variations in berry chemistry followed similar patterns to those seen in aerial imagery of vineyards with structured vigour zones. Furthermore, as most of the spatial structure in the variation of fruit composition is dominated by flavanols, opportunities for reduced analytical costs in winery laboratories also arise.

Abstract Image

查看原文

微信好友朋友圈 QQ好友复制链接

本刊更多论文

加州赤霞珠葡萄果实组成的时空变化特征及其对葡萄栽培管理的影响

背景和目的酿酒葡萄的产量和果实成分的空间变异性已经得到证实，但很少有影响葡萄酒成分的化学成分在足够高的样品密度下被分析，以与遥感图像的变异性进行比较。该项目的目的是评估三个季节收获时葡萄成分的空间变异性，并将其与遥感冠层植被数据进行比较，以评估其在支持有针对性管理方面的效用。方法与结果分析了水果样品的组成，比较了它们与航空影像产品、归一化植被指数(NDVI)以及影像冠层温度(Tc)与地面气象站环境温度(Ta)、(Tc−Ta)之间的空间变异性。利用季节航拍图像生成的k-means集群对果实成分进行地带区分，结果表明，葡萄产量的差异高达2.7 kg/m，花青素的差异高达0.3 mg/g，碳-6醇和醛(C6)的差异高达1.2 pg/g，这些“品质区”在某些葡萄园和/或季节的图像中得到了反映。结论在多个时间点采集的NDVI和(Tc - Ta)数据与收获时评估的果实成分的多个属性存在相关性，但大多数相关性在收获时达到峰值。它们在葡萄园中表现最强，空间变异表现出较强的空间结构。研究的意义浆果化学的空间变化遵循与具有结构活力区的葡萄园的航空图像相似的模式。此外，由于水果成分变化的大部分空间结构是由黄烷醇主导的，因此也出现了降低酒厂实验室分析成本的机会。

本文章由计算机程序翻译，如有差异，请以英文原文为准。

求助全文

约1分钟内获得全文去求助

来源期刊

Australian Journal of Grape and Wine Research 工程技术-食品科技

CiteScore

5.30

自引率

7.10%

发文量

审稿时长

3 months

期刊介绍： The Australian Journal of Grape and Wine Research provides a forum for the exchange of information about new and significant research in viticulture, oenology and related fields, and aims to promote these disciplines throughout the world. The Journal publishes results from original research in all areas of viticulture and oenology. This includes issues relating to wine, table and drying grape production; grapevine and rootstock biology, genetics, diseases and improvement; viticultural practices; juice and wine production technologies; vine and wine microbiology; quality effects of processing, packaging and inputs; wine chemistry; sensory science and consumer preferences; and environmental impacts of grape and wine production. Research related to other fermented or distilled beverages may also be considered. In addition to full-length research papers and review articles, short research or technical papers presenting new and highly topical information derived from a complete study (i.e. not preliminary data) may also be published. Special features and supplementary issues comprising the proceedings of workshops and conferences will appear periodically.