Modelling the phenological development of cv. Touriga Nacional and Encruzado in the Dão Wine Region, Portugal
The grapevine vegetative cycle, which is morphologically described by its phenological stages, is strongly determined by weather conditions. Phenological models are widely applied in viticulture and are based on the assumption that air temperature is the preponderant environmental factor which deter...
| Main Authors: | , , , , , |
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| Format: | Article |
| Language: | English |
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International Viticulture and Enology Society
2021-09-01
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| Series: | OENO One |
| Subjects: | |
| Online Access: | https://oeno-one.eu/article/view/4646 |
| _version_ | 1818788912044179456 |
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| author | Pedro Rodrigues Vanda Pedroso Carla Henriques Ana Matos Samuel Reis João A. Santos |
| author_facet | Pedro Rodrigues Vanda Pedroso Carla Henriques Ana Matos Samuel Reis João A. Santos |
| author_sort | Pedro Rodrigues |
| collection | DOAJ |
| description | The grapevine vegetative cycle, which is morphologically described by its phenological stages, is strongly determined by weather conditions. Phenological models are widely applied in viticulture and are based on the assumption that air temperature is the preponderant environmental factor which determines vine development. In this study, phenological development models (PDMs) were calibrated and validated to simulate several intermediate stages between budbreak and veraison for cv. Touriga Nacional (TN) and cv. Encruzado (EN) winegrape varieties, which are widely grown in the Dao Wine Region, Portugal. These are thermal models, with which the daily sum of the rate of forcing (R) was calculated using a sigmoid function. For this purpose, a high-quality and comprehensive dataset was used which combines phenology data and weather station data in several vineyard sites spread over the region. The model showed an overall high performance (global RMSE of 5.4 days for EN and 5.0 days for TN), although it depended on the phenological stage and variety. The RMSE ranged from 3.2 to 6.2 for TN, and from 3.9 to 6.8 for EN. For both varieties and in all phenological stages, the RMSE was significantly lower than the standard deviation of the phenological observations. For TN, the model efficiency was greater than 0.71 for all phenological stages. In future studies, these models will be combined with specific models that simulate the evolution of winegrape berry quality indicators commonly used for harvest decision support. The relatively low complexity of the selected PDMs enables their use as a crop management and decision support tool. To our knowledge, no previous studies have been carried out on either of these two varieties and their intermediate phenological timings. The present study is an illustration of conceivable model development under diverse environmental conditions, thus allowing similar approaches to be adopted in other wine regions on a worldwide scale. |
| first_indexed | 2024-12-18T14:31:12Z |
| format | Article |
| id | doaj.art-ef3f5b4fd8614968959244c7d36b1270 |
| institution | Directory Open Access Journal |
| issn | 2494-1271 |
| language | English |
| last_indexed | 2024-12-18T14:31:12Z |
| publishDate | 2021-09-01 |
| publisher | International Viticulture and Enology Society |
| record_format | Article |
| series | OENO One |
| spelling | doaj.art-ef3f5b4fd8614968959244c7d36b12702022-12-21T21:04:35ZengInternational Viticulture and Enology SocietyOENO One2494-12712021-09-0155310.20870/oeno-one.2021.55.3.4646Modelling the phenological development of cv. Touriga Nacional and Encruzado in the Dão Wine Region, PortugalPedro Rodrigues0Vanda Pedroso1Carla Henriques2Ana Matos3Samuel Reis4João A. Santos5CERNAS-IPV Research Centre, Polytechnic Institute of Viseu, Campus Politécnico, Repeses, 3504-510 Viseu, PortugalDRAPC/ Centro de Estudos Vitivinícolas do Dão, Quinta da Cale, 3520-090 Nelas, PortugalSchool of Technology and Management, Polytechnic Institute of Viseu, Campus Politécnico, Repeses, 3504-510 Viseu, Portugal - Centre for Mathematics of the University of Coimbra (CMUC)School of Technology and Management, Polytechnic Institute of Viseu, Campus Politécnico, Repeses, 3504-510 Viseu, Portugal - Centre for Research in Digital Services (CISeD), Polytechnic Institute of Viseu, Campus Politécnico, Repeses, 3504-510 Viseu, PortugalCoLAB VINES&WINES-National Collaborative Laboratory for the Portuguese Wine Sector, Associação para o Desenvolvimento da Viticultura Duriense (ADVID), Edifício Centro de Excelência da Vinha e do Vinho, Régia Douro Park, 5000-033 Vila Real, PortugalCentre for the Research and Technology of Agro-Environmental and Biological Sciences, CITAB, Universidade de Trás-os-Montes e Alto Douro, UTAD, 5000-801 Vila Real, Portugal; jsantos@utad.pt (J.A.S.).The grapevine vegetative cycle, which is morphologically described by its phenological stages, is strongly determined by weather conditions. Phenological models are widely applied in viticulture and are based on the assumption that air temperature is the preponderant environmental factor which determines vine development. In this study, phenological development models (PDMs) were calibrated and validated to simulate several intermediate stages between budbreak and veraison for cv. Touriga Nacional (TN) and cv. Encruzado (EN) winegrape varieties, which are widely grown in the Dao Wine Region, Portugal. These are thermal models, with which the daily sum of the rate of forcing (R) was calculated using a sigmoid function. For this purpose, a high-quality and comprehensive dataset was used which combines phenology data and weather station data in several vineyard sites spread over the region. The model showed an overall high performance (global RMSE of 5.4 days for EN and 5.0 days for TN), although it depended on the phenological stage and variety. The RMSE ranged from 3.2 to 6.2 for TN, and from 3.9 to 6.8 for EN. For both varieties and in all phenological stages, the RMSE was significantly lower than the standard deviation of the phenological observations. For TN, the model efficiency was greater than 0.71 for all phenological stages. In future studies, these models will be combined with specific models that simulate the evolution of winegrape berry quality indicators commonly used for harvest decision support. The relatively low complexity of the selected PDMs enables their use as a crop management and decision support tool. To our knowledge, no previous studies have been carried out on either of these two varieties and their intermediate phenological timings. The present study is an illustration of conceivable model development under diverse environmental conditions, thus allowing similar approaches to be adopted in other wine regions on a worldwide scale.https://oeno-one.eu/article/view/4646Phenological developmentModelingGrapevineTouriga NacionalEncruzadoDão Wine Region |
| spellingShingle | Pedro Rodrigues Vanda Pedroso Carla Henriques Ana Matos Samuel Reis João A. Santos Modelling the phenological development of cv. Touriga Nacional and Encruzado in the Dão Wine Region, Portugal OENO One Phenological development Modeling Grapevine Touriga Nacional Encruzado Dão Wine Region |
| title | Modelling the phenological development of cv. Touriga Nacional and Encruzado in the Dão Wine Region, Portugal |
| title_full | Modelling the phenological development of cv. Touriga Nacional and Encruzado in the Dão Wine Region, Portugal |
| title_fullStr | Modelling the phenological development of cv. Touriga Nacional and Encruzado in the Dão Wine Region, Portugal |
| title_full_unstemmed | Modelling the phenological development of cv. Touriga Nacional and Encruzado in the Dão Wine Region, Portugal |
| title_short | Modelling the phenological development of cv. Touriga Nacional and Encruzado in the Dão Wine Region, Portugal |
| title_sort | modelling the phenological development of cv touriga nacional and encruzado in the dao wine region portugal |
| topic | Phenological development Modeling Grapevine Touriga Nacional Encruzado Dão Wine Region |
| url | https://oeno-one.eu/article/view/4646 |
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