Document Type : Research Paper


1 Ph.D. Candidate, Department of Agronomy, Faculty of Agriculture, Zabol University, Zabol, Iran.

2 Associate Professor, Department of Agronomy, Faculty of Agriculture, Zabol University, Zabol, Iran.

3 Professor, Department of Agronomy, Faculty of Agriculture, Zabol University, Zabol, Iran.


Drought stress is the most important factor in crop yield reduction. It is important to know how to cope with drought. This experiment is carried out to investigate the effect of organic growth stimulator (Hamoon green) on yield and some physiological indices of safflower under drought stress, during 2017-2018 in university of Zabol (Chahnime) as a split plot, based on RCBD with three replications. Experimental treatments include drought factor based on plant growth stages at three levels (complete irrigation throughout the growing season, irrigation up to terminal bud forms, and irrigation up to completed flowering) and spraying factor of organic growth stimulator at 4 levels (pure water), the foliar application has been Hamoon green 1 liter in 10 liters + calcium, Hamoon green 1 liter in 20 liters + calcium and Hamoon green 1 liter in 30 liters+ calcium. Results show that drought has reduced the height, 1000-seed weight, and oil percentage, by 44.41%, 31.24%, and 17.10%, respectively. Spraying hamoon green 1 liter in 10 liters+ calcium leads to an increase of 18.03%, 13.90%, and 13.74% for the above traits, compared to the control. The highest grain yield (1882.55 kg.ha-1), chlorophyll a, b, total and carotenoids (3.49, 0.94, 4.44, and 7.37 fw, respectively), selenium content (5.18 fw) and seed calcium content (2.91%) are obtained from hamoon green 1 liter in 10 liter + calcium and complete irrigation treatment. In general, it seems that by spraying 1 liter per 10 liters+ calcium, a good performance can be achieved.


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