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…

Oxygen consumption by diferent oenological tanins in a model wine solution

INTRODUCTION: Oenological tannins are widely used in winemaking to improve some characteristics of wines [1] being the antioxidant properties probably one of the main reasons [2]. However, commercial tannins have different botanical sources and chemical composition [3] which probably determines different antioxidant potential. There are some few references about the antioxidant properties of commercial tannins [4] but none of them have really measured the direct oxygen consumption by them. The aim of this work was to measure the kinetics of oxygen consumption by different commercial tannins in order to determine their real capacities to protect wine against oxygen. MATERIAL AND METHODS: 4 different commercial tannins were used: T1: condensed tannin from grape seeds, T2: gallotannin from chinese gallnuts, T3: ellagitannin from oak and T4: tannin from quebracho containing condensed tannins and ellagitannins.

Read More

Defoliation combined with exogenous ABA application results in slower ripening and improved anthocyanin profile

Reducing sugar accumulation in grape (Vitis vinifera L.) berries may be a way to mitigate the effect of climate change. Managing canopy and crop load is an effective way to do so, however, reducing canopy size has been demonstrated to induce undesirable effects on anthocyanins. The aim of this study was to test if an application of exogenous ABA on the grape berries of defoliated vines (⅔ of the leaves removed) can result in slower sugar accumulation while maintaining grape and wine quality. An experiment with defoliation and exogenous ABA application on directly on clusters (factorial design 2×2) was performed with ‘Tempranillo’ fruit-bearing cuttings.

Read More

ANTI-TRANSPIRANT MODULATION OF GRAPE RIPENING: EFFECTS ON MERLOT VINE DEVELOPMENT AND ROSÉ WINE PHENOLIC AND AROMATIC PROFILES

Climate changes are impacting viticultural regions throughout the world with temperature increases being most prevalent.1 These changes will not only impact the regions capable of growing grapes, but also
the grapes that can be grown.2 As temperatures rise the growing degree days increase and with it the sugar accumulation within the berries and subsequent alcohol levels in wine. Consequently, viticultural
practices need to be examined to decrease the levels of sugars.

Read More

Soil, foliar, and juice nitrogen application: influence on fruit and wine for Chardonel grown in Virginia

Nitrogen (N) is applied in the vineyard or the winery in wine production systems. The influence of different routes of N application is not well understood.

Read More

Exploring multisensory interactions through the study of astringency diversity of mono-varietal Italian red wines

According to the OIV Focus 2017 estimating the vine varieties distribution in the world, Italy is the richest grape producing country in terms of varieties.

Read More