تأثير الاضاءة ومعاملات الري على نشاط نبات دوار الشمس

Abstract

Abstract: This practical and field experiment was conducted in Tripoli, at Tajoura, during the growing season in 2020 for the sunflower plant (Helianthus annuus), to study the effect of two levels of high and low lighting, and two levels of 100% full irrigation, and 75% deficient irrigation. Net Photosynthesis and Transpiration were measured using a portable photosynthetic meter (Handheld Photosynthesis System CI -340 CID CO2 / H2O Infrared Gas Analysis (IRGA), at flowering for the plant of sunflower.