Chlorophyll in sunflower plants with omission of N, P and K in nutrient solution / Clorofila em plantas de girassol com omissão de N, P e K em solução nutritiva

• Autor(a) principal: Oliveira, Uasley Caldas de
• Data de Publicação: 2020
• Outros Autores: Lima, Janderson do Carmo, Bezerra, Mariana Nogueira, Souza, Aline dos Anjos, Santos, Anacleto Ranulfo dos, Souza, Girlene Santos de
• Tipo de documento: Artigo
• Idioma: eng
• Título da fonte: Revista Veras
• Texto Completo: https://ojs.brazilianjournals.com.br/ojs/index.php/BRJD/article/view/8318
• topic: Helianthus annuus L.; mineral nutrition; Macronutrients.

Helianthus annuus L. popularly known as sunflower is among the four largest crops interested in the production of fuel oil in the world, with great adaption to the different edaphoclimatic conditions in Brazil which makes it an important economic alternative in rotation, consortium and succession systems of crops in grain-producing regions. The objective of this work was to evaluate the chlorophyll indices in sunflower plants, submitted to the omission of N, P and K in nutrient solution.The experiment was carried out in a greenhouse, located at the Universidade Federal do Recôncavo da Bahia – UFRB. The treatments studied were: T1- Complete Solution; T2- 50% diluted solution; T3- Omission of N; T4- Omission of P; T5 – Omission of K. The application of treatments started 15 days after emergence, data were collected and submitted to Tukey analysis of variance at 5% probability.The omission of the studied macronutrients negatively affects the levels of chlorophyll a, b and total of sunflower plants.