terclim by ICS banner
IVES 9 IVES Conference Series 9 Does foliar fertilization with Seaweed improve the productivity and quality of ‘Merlot’ grape must?

Does foliar fertilization with Seaweed improve the productivity and quality of ‘Merlot’ grape must?

Abstract

Developing technologies that help vines survive and produce in quantity and quality within current times is mandatory. In this sense, in the 2021/2022 agricultural harvest, the influence of the foliar application of seaweed – Laminaria japonica was studied, aiming at productivity and quality of the must in the ‘Merlot’ grape. In the city of “Santana do Livramento”, “Rio Grande do Sul” (RS), Brazil; in a 15-year-old commercial vineyard of ‘Merlot’ clone ENTAV-INRA® 347, grafted onto ‘SO4’ rootstock, the following treatments were applied on 6 occasions: No treatment (control) and; Foliar application of Laminaria japonica seaweed (commercial product: Exal (ALAS), 2 kg ha-1) The treatments consisted of 4 replications (interval) and each interval had 4 plants. The response variables evaluated at harvest time were: productivity (t ha-1). Using the WineScanTM SO2 equipment (FOSS®, Denmark) the must was evaluated: density [g (cm3)-1], sugars (g L-1), pH, tartaric acid (g L-1), malic acid (g L-1), gluconic acid (g L-1), ammonia content (mg L-1), potassium content (mg L-1), total acidity (g L-1 in tartaric acid). The treatment with foliar application of seaweed stood out in productivity (11.3 t ha-1) when compared to the control treatment (9.8 t ha-1). In the must, the potassium content showed significant differences between the treatments, with a reduced level being obtained with the foliar application of seaweed. It is preliminarily concluded that the application of foliar fertilizer based on seaweed (Laminaria japonica) increased the productivity of ‘Merlot’ vines and reduced the potassium content in the must.

Acknowledgements: To the Company “Algas” América Latina Agricultura Sustentável (ALAS), in the names of its managing partners, Luis Augusto Bennemann de Souza and Fernando Carbonari Collares, for the donation of organic fertilizer composed of Marine Algae (Exal), and for the contribution with some inputs to the execution of this research.

Download the abstract

DOI:

Publication date: June 13, 2024

Issue: Open GPB 2024

Type: Poster

Authors

Juan Saavedra del Aguila1*, Isabel Cristina Robaina Figueira Freitas1, Jansen Moreira Silveira1, Joana Darque Ribeiro Ozório1, Etiane Skrebsky Quadros1, Fabrício Domingues2, Lília Sichmann Heiffig-del Aguila3

1 Federal University of Pampa (UNIPAMPA)/Campus Dom Pedrito, Bachelor’s Degree in Enology
2 Consultant in Winegrowing and Agribusiness Management
3 Embrapa Temperate Climate

Contact the author*

Keywords

Vitis vinifera, sustainability, organic fertilizer, organic production, climate change

Tags

IVES Conference Series | Open GPB | Open GPB 2024

Citation

Related articles…

The dynamics of δ13C and δ18O in musts during berries development

Aim: Many processes or reactions that occur in plants involved isotopic discrimination. Water availability, for example, affects the isotopic ratio of carbon (δ13C) and oxygen (δ18O). In viticulture, δ13C is used in experiments related to water relations and irrigation in vineyards. δ18O is used much less but it could be a good complement to δ13C. The aim of this study was to generate knowledge on how these isotopic ratios, measured in musts, could help to better understand the water behavior of grape varieties. 

Read More

Multi-trait selection in ancient grapevine varieties

The selection of ancient grapevine varieties aims to achieve genetic gains in several important traits that can make the variety more interesting for the objectives of the producers. Traditionally, yield and quality traits of the must have been considered for selection, but many others can be taken into account. Linear mixed models are fitted to the data to predict the empirical best linear unbiased predictors (EBLUPs) of genotypic effects for each evaluated trait, which will be the basis for selection.

Read More

High density balsamic vinegar: application of stable isotope ratio analysis to determine watering down.

Aceto balsamico di Modena IGP (ABM) is an Italian worldwide appreciated PGI (Protected Geographical Indication) vinegar,  obtained from cooked and/or concentrated grape must (at least 20% of the volume), with the addition of at least 10% of wine vinegar and a maximum 2% of caramel for color stability (EU Reg. 583/ 2009).

Read More

Maturità fenolica e cellulare come metodo di valutazione dell’interazione vitigno-ambiente: il caso del Cabernet-Sauvignon

ln the current work, phenolic and cellular maturation curves were used to assess the degree of adaptation of the cultivar Cabernet sauvignon to the sites under esamination. Five wine­-producing zones with different pedoclimatic characteristics and latitudes were considered (Marche, Toscana, Emilia, Friuli and Slovenia).

Read More

“Q & A” of the european commission for labeling and desalcoholization for wines: european wine “soft-law”?

Recently, the European Commission seems to have inaugurated a new mechanism for regulating the wine sector. Through two communications, articulated in the form of “Questions & Answers”, concerning the new rules for labeling (24.11.2023) and dealcoholization of wine (15.01.2024), the Commission is not simply “explaining” the new rules but, in an approach close to the theory of “Circulaire Normative” established in comparative law, chooses among different interpretations and even adds Praeter Legem constraints.

Read More