Effects of Adding NPK fertilizer and Spraying Glutamic Acid on the Growth of Tecoma stans

Abstract

This study was carried out at the College of Agriculture \ Horticulture Department \ Tikrit University for the 2021 growing season, in order to show the effect of spraying glutamic acid in different in three concentrations, and adding a balanced fertilizer (NP K) (20 20 20) in three quantities, on some characteristics of the mineral content of Tecoma stans. Spraying plants with three concentrations of glutamic acid (0.50, 0.25, 0) mg L -1, and adding a balanced fertilizer (NP K) in three quantities (1, 0.5, 0) grams of fertilizer / anvil and the interaction between them to show their effect on the characteristics of the mineral content in the leaves For Tecoma stans, according to a randomized complete block design. The results of the study indicated that the plants treated with a concentration of (0.50) mg L -1,  and the addition of (1) g/anvil of (NP K) fertilizer for Tecoma tree recorded a significant increase in all studied traits compared to With the control treatment, the percentage of the mineral content characteristics was (1.975%) for the nitrogen concentration in the leaves, and (12.493%) for the protein content, and the phosphorous concentration was (1.841%) and (1.84%) for the potassium concentration, while the electrolyte concentration was (7,925%). Compared with the lowest values recorded by the control treatment of no spraying with acid and without adding fertilizer, it was (1.850%) and (11.303%), (1.723%), (1.752%), (6.64%) in the leaves. for (nitrogen, protein, phosphorous, potassium and carbohydrates) respectively.