Response of Barley Crop Growth to Concentrations and Number of Sprays of NPK Nano-Compound Fertilizer

Abstract

This study was conducted in Al-Alam district - Tikrit during the agricultural season 2021-2022, to study the efficiency of spraying Nano-fertilizers on the growth indicators of barley plants grown in plastic pots. In this study, the NPK fertilizer was used after converting it into nanoparticles. Statistical analysis was conducted at (P≤0.05) and the results were as follows: The interaction between the different concentrations of NPK fertilizer in Nano form and the number of sprays during the growing season significantly affected the vegetative traits, as the interaction between the concentration 2gm/L and spraying twice during the growing season gave the highest plant height, root length, shoot weight, root weight, number of leaves/plant, and the highest leaf area/plant were (84.58 cm, 55.0 cm, 1.18 gm, 1.71 gm and 56.88 cm2), respectively. The interaction between the concentrations of Nano-fertilizer and the number of applications had a significant effect on the plant content of chlorophyll in its three types, as the concentration of 2 gm/L and spraying twice gave the highest content of chlorophyll a, b and total chlorophyll reached (94.74, 68.18 and 168.88) µgm/gm weight. Straight leaves