The Effect of Potassium, Microelements and Cultivar on the Activity of Invertase and Cellulase Enzymes for the Fruits of Date Palm (phoenix dactylifera L) Grown in Thi-Qar

Abstract The study was conducted during the growing season 2022 in one of private orchards Nasiriya district, center Thi-Qar governorate, with aim knowing effect spraying fruits potassium and microelements on activity enzymes invertase cellulase for two cultivars date palm, Al-Shwethi Al-Sayer, stages Al-Khalal Al-Rutab, as sprayed at concentrations (0 2 4) ml L -1 trace elements (0, 1 2) 10 trees were selected from palms 5 cultivar (5 trees) Al-Sayer cultivar, results showed that there a significant potassium, concentration exceeded 4 , highest rates Khalal stage 38.61 30.90 units gm min respectively, achieved had difference effectiveness interstitial stage, which amounted to 38.16 30.77 respectively. rate enzyme 39.04 22.00 units, 33.50 17.73 wet phases, All double triple interactions between factors an impact Significantly increased both phases.