Lettuce production in greenhouse under fertirrgation with nitrogen and potassium silicate
| Autor: | Renan Soares de Souza, Roberto Rezende, Tiago Luan Hachmann, Cláudia Salim Lozano, André Felipe Barion Alves Andrian, Paulo Sérgio Lourenço de Freitas |
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| Jazyk: | angličtina |
| Rok vydání: | 2017 |
| Předmět: | |
| Zdroj: | Acta Scientiarum: Agronomy, Vol 39, Iss 2 (2017) |
| Druh dokumentu: | article |
| ISSN: | 1679-9275 1807-8621 |
| DOI: | 10.4025/actasciagron.v39i2.32897 |
| Popis: | The objective of this study was to evaluate the effect of nitrogen and potassium silicate on the productive and commercial aspects of curly lettuce, Vera cultivar. The experimental design was completely randomized (CRD), with ten treatments and three replications. The treatments, arranged in a factorial design according to the Plan Puebla III matrix (Turrent & Laird, 1975), consisted of the combination of five doses of nitrogen (9; 54; 90; 126 and 171 kg ha-1) and five doses of potassium silicate (1.15; 6.90; 11.50; 16.10 and 21.85 kg ha-1). A control treatment without application of nitrogen and potassium silicate was also inserted. The crop was grown in a greenhouse and the doses were applied as sidedressing using drip micro-irrigation system. Total fresh matter, commercial fresh matter, non-commercial fresh matter, number of leaves and commercial trade index were evaluated. The commercial fresh matter and the number of commercial leaves per plant were affected only by nitrogen fertigation and increased linearly with the increase in the nitrogen dose of N, with the best responses observed at the highest dose of this element (171 kg ha-1). Potassium silicate had effect only in non-commercial fresh matter, not influencing the other characteristics. |
| Databáze: | Directory of Open Access Journals |
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