The Role of Selected Treatments in the Parameters of Leaf Growth and Yield of Stevia Plants Under Deficit Irrigation System

Abstract A field experiment was conducted at Research Station A, which is one of the research stations affiliated with College Agricultural Engineering Sciences - University Baghdad (Al-Jadriya), a cloth house (Saran) and shading rate 25%. The study aimed to increase plant yield, whether foliar or active compounds, link water consumption presence absence leaf area (plant cutting). carried out using randomized complete block design (RCBD) according split-plot arrangement three replicates. Each main experimental unit contained 5 rows (representing secondary units), where distance between row another 75 cm, plants 20 cm. Then, separation left units 1.5 m. plots represented irrigation factor (I 1 full treatment, I 2 deficit treatment an amount 50% added comparison for two irrigations immediately after cutting. Besides, 3 Conversely, sub-plots were represents all treatments that treated 30 days cutting, spraying kinetin concentration 10 mg.L -1 . Plus, growth retardant Cycocel (CCC) 100 , pinching Licorice extract results showed significant decrease in number branches, area, leaves dry weight each level first second cuttings. However, content chlorophyll decreased relative All superior branches yield significantly per Also, Licorice, kinetin, cycocel Though comparison, b