Journal
SCIENTIA HORTICULTURAE
Volume 219, Issue -, Pages 191-199Publisher
ELSEVIER SCIENCE BV
DOI: 10.1016/j.scienta.2017.03.014
Keywords
Vitis vinifera L.; Tempranillo; Nitrogen; Anthocyanins; Flavonols; Flavonoid
Categories
Funding
- Instituto Nacional de Investigacion y Tecnologia Agraria y Alimentaria (INIA)-Gobierno de La Rioja [RTA2013-00053-C03-01]
- Gobierno de La Rioja4 [R-11-1]
- INIA-Gobierno de La Rioja
- European Social Fund
- MINECO
Ask authors/readers for more resources
Foliar fertilization with nitrogen compounds has been reported to have a substantial impact on grape composition. Overall, this practice has been associated with an increase of grape nitrogen compounds. However, much less is known about its real impact on phenolic composition, especially through more than one year. In the current work, grape phenolic composition was studied after carrying out foliar treatments with two nitrogen sources (phenylalanine and urea) at 0.9 kg N/ha over two consecutive vintages. Phenylalanine treatments increased the concentration of a few anthocyanin compounds in comparison with control, although hydroxycinnamic acids were decreased in the first year of the study. In contrast, urea application increased some flavanol compounds in the second year, while no effect was observed in the first one. Overall, it was not observed a significant decrease of phenolic compounds which, in contrast, has been traditionally associated with high nitrogen supply by soil fertilization. In conclusion, the foliar application of phenylalanine and urea at 0.9 kg N/ha did not exert a big impact on grape phenolic composition. (C) 2017 Elsevier B.V. All rights reserved.
Authors
I am an author on this paper
Click your name to claim this paper and add it to your profile.
Reviews
Recommended
No Data Available