Effect of seaweed extracts, urea, and integrated nano-fertilizer on the kinetic parameters of urease enzyme in rice-cultivated

• Main Authors: Al-Juthery, Hassanein Hayyawi, Al-Taweel, Luma Salih Jabbar
• Format: Conference Proceeding
• Language: English
• Subjects: Algae; Enzymes; Fertilizers; Flowering; Ripening; Seaweeds; Soils; Ureas
• ISSN: 0094-243X; 1551-7616
• DOI: 10.1063/5.0204875

To investigate the impact of adding seaweed extracts, urea, and complete nano-fertilizer on the effectiveness of urease enzyme at the rhizosphere in the flowering and full maturity stages in soil planted with rice, an experiment was carried out in one of the agricultural fields affiliated to Babylon Governorate / Al-Tali’ah district. The experiment was applied according to an RCBD with three replications in a simple one-way experience. The treatments and their symbols must be mentioned in full according to their sequence. The results of the Duncan test showed the following. The combination of A2NC1 containing half of the integrated nano fertilizer and the whole recommendation of Algae extracts had the highest maximum Speed (Vmax)in the flowering and complete ripening stages of 209.6 and 185.8 µgN-NH4+ g−1 soil 2h-1, respectively compared to the comparison treatment which recorded the lowest Speed of 91,78 µgN-NH4+ g−1 soil 2h−1. In the flowering stage, the combination of A2U consisting of urea with marine algae extracts recorded the lowest value of Michaelis’ constant of 4.263 mmol compared to the control treatment, which recorded 13.797 mmol in the flowering stage. In the stage of full maturity, the fertilizer treatment A2, which consisted of applying the recommended marine algae extracts, recorded the lowest value of Michaelis constant of 5.27 mmol compared to the control treatment, which recorded 12.07 mmol.