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Prediction of Nitrogen Dosage in 'Alicante Bouschet' Vineyards with Machine Learning Models.
Brunetto, Gustavo; Stefanello, Lincon Oliveira; Kulmann, Matheus Severo de Souza; Tassinari, Adriele; Souza, Rodrigo Otavio Schneider de; Rozane, Danilo Eduardo; Tiecher, Tadeu Luis; Ceretta, Carlos Alberto; Ferreira, Paulo Ademar Avelar; Siqueira, Gustavo Nogara de; Parent, Léon Étienne.
Afiliação
  • Brunetto G; Soil Science Department, Federal University of Santa Maria, Santa Maria 97105-900, Brazil.
  • Stefanello LO; Soil Science Department, Federal University of Santa Maria, Santa Maria 97105-900, Brazil.
  • Kulmann MSS; Forest Science Department, Federal University of Santa Maria, Santa Maria 97105-900, Brazil.
  • Tassinari A; Soil Science Department, Federal University of Santa Maria, Santa Maria 97105-900, Brazil.
  • Souza ROS; Forest Science Department, Federal University of Santa Maria, Santa Maria 97105-900, Brazil.
  • Rozane DE; Fruticulture Department, State University of Paulista "Julio Mesquita Filho", Registro 11900-000, Brazil.
  • Tiecher TL; Rio Grande do Sul Federal Institute, Campus Restinga, Porto Alegre 91791-508, Brazil.
  • Ceretta CA; Soil Science Department, Federal University of Santa Maria, Santa Maria 97105-900, Brazil.
  • Ferreira PAA; Soil Science Department, Federal University of Santa Maria, Santa Maria 97105-900, Brazil.
  • Siqueira GN; Soil Science Department, Federal University of Santa Maria, Santa Maria 97105-900, Brazil.
  • Parent LÉ; Soil Science Department, Federal University of Santa Maria, Santa Maria 97105-900, Brazil.
Plants (Basel) ; 11(18)2022 Sep 16.
Article em En | MEDLINE | ID: mdl-36145819
Vineyard soils normally do not provide the amount of nitrogen (N) necessary for red wine production. Traditionally, the N concentration in leaves guides the N fertilization of vineyards to reach high grape yields and chemical composition under the ceteris paribus assumption. Moreover, the carryover effects of nutrients and carbohydrates stored by perennials such as grapevines are neglected. Where a well-documented database is assembled, machine learning (ML) methods can account for key site-specific features and carryover effects, impacting the performance of grapevines. The aim of this study was to predict, using ML tools, N management from local features to reach high berry yield and quality in 'Alicante Bouschet' vineyards. The 5-year (2015-2019) fertilizer trial comprised six N doses (0-20-40-60-80-100 kg N ha-1) and three regimes of irrigation. Model features included N dosage, climatic indices, foliar N application, and stem diameter of the preceding season, all of which were indices of the carryover effects. Accuracy of ML models was the highest with a yield cutoff of 14 t ha-1 and a total anthocyanin content (TAC) of 3900 mg L-1. Regression models were more accurate for total soluble solids (TSS), total titratable acidity (TTA), pH, TAC, and total phenolic content (TPC) in the marketable grape yield. The tissue N ranges differed between high marketable yield and TAC, indicating a trade-off about 24 g N kg-1 in the diagnostic leaf. The N dosage predicted varied from 0 to 40 kg N ha-1 depending on target variable, this was calculated from local features and carryover effects but excluded climatic indices. The dataset can increase in size and diversity with the collaboration of growers, which can help to cross over the numerous combinations of features found in vineyards. This research contributes to the rational use of N fertilizers, but with the guarantee that obtaining high productivity must be with adequate composition.
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Texto completo: 1 Coleções: 01-internacional Base de dados: MEDLINE Tipo de estudo: Clinical_trials / Prognostic_studies / Risk_factors_studies Idioma: En Revista: Plants (Basel) Ano de publicação: 2022 Tipo de documento: Article País de afiliação: Brasil País de publicação: Suíça

Texto completo: 1 Coleções: 01-internacional Base de dados: MEDLINE Tipo de estudo: Clinical_trials / Prognostic_studies / Risk_factors_studies Idioma: En Revista: Plants (Basel) Ano de publicação: 2022 Tipo de documento: Article País de afiliação: Brasil País de publicação: Suíça