1. Nitrogen, phosphorus and potassium nutrition on ornamental Ipomoea purpurea growth
- Author
-
Armando Reis Tavares, Letícia Rico Strafacci, Karina Gonçalves Gonçalves Da, Shoey Kanashiro, and Mauricio Lamano Ferreira
- Subjects
floriculture. morninglory. mineral nutrition. npk. ,Agriculture - Abstract
The study aimed to evaluate the effect of nitrogen, potassium, and phosphorus on I. purpurea growth. Plants were weekly fertilized with 50 mL of Hoagland & Amon (1950) modified nutrient solution as follow: Nitrogen solution with 0, 0.0888, 0.2001, 0.6003 or 1.801 g L-1 of ammonium nitrate; Phosphorus solution with 0, 2.1, 5.5, 10.3 or 13.5 mL L-1 phosphoric acid, and Potassium solution with 0, 0.3728, 1.1183, 1.8638 or 2.2065 g L-1 potassium chloride. I. purpurea showed high demand for N, reflected on an increase of leaf area. Higher concentration of N promoted preferential investment in photosynthetic areas, as confirmed by the leaf/root ratio. I. purpurea is responsive P fertilization, mainly to promote stem and root growth. I. purpurea was not responsive to K fertilization. The results showed that fertilization with 0.2001 g L-1 ammonium nitrate and 5.5 mL L-1 phosphoric acid is recommended for I. purpurea cultivation.
- Published
- 2021
- Full Text
- View/download PDF