Research Article
Morteza Abdi1, Reza Zarghami2,
Abstract
In order to study the effects of dryness stress and changes in the source and destination on the performance and the elements of performance in sunflower, a test was carried out in split plot form in the template of full random blocks experiments in three intervals. The test was performed at the research farm of Islamic Azad University, Varamin- Pishva Branch in Ghaleh-e-sin of Varamin in summer 2013. The main factor included four irrigation levels (dryness stress) based on the morphologic a1: desirable ( full irrigation once per eight days), a2: No irrigation from budding to flowering, a3: no irrigation from flowering to the beginning of seed filling, a4: no irrigation from seed filing to physiological maturity of seeds; and the sub-factors of changes in source and replacement reservoirs consisted of) b1: control without manipulation, b2: omission of 33% of the leave, and, b3: omission of 66% of leaves. Based on the results, different levels of irrigation had highly significant effects (P