Evaluation of agricultural traits of three winter Safflower cultivars under drought stress conditions in different growth stages
Subject Areas : Crop Production Researchsaeed akbarimehr 1 , MohammadJavad Mirhadi 2 , Ghorban Noormohammadi 3
1 - Department of Agronomy, Takestan Branch, Islamic Azad University, Takestan, Iran.
2 - Associate Professor, Department of Agronomy, Science and Research Branch, Islamic Azad University, Tehran, Iran.
3 - Professor, Department of Agronomy, Science and Research Branch, Islamic Azad University, Tehran, Iran.
Keywords: Drought stress, Safflower, Variety, Yield ,
Abstract :
Safflower is an oily plant native to Iran, and at the same time, it has good resistance to drought and salt stress, which is a suitable plant for self-sufficiency in this field due to the lack of oil and the large volume of its import to the country. This research was conducted in order to evaluate three varieties of winter safflower under drought stress conditions in different stages of growth in terms of seed and oil yield and other traits. This experiment was carried out in the form of split plots in the form of a basic design of randomized complete blocks in three replications, the main plots containing five levels of drought stress, respectively: Drought stress at budding stage, Drought stress at the beginning of flowering stage, drought stress in the mid-flowering stage, drought stress in the seeding stage and no drought stress and the sub-plots included three cultivars I.L.111, L.R.V.51.51, and K.W.2. Seed yield, oil yield, oil percentage are important traits measured. The obtained results show that among the different levels of drought stress, the stress in the stages of budding and the beginning of flowering caused a significant decrease in terms of seed and oil yield. Also, among the studied cultivars, L.R.V.51.51 had the best seed and oil yield. and the lowest sensitivity of safflower to drought stress is in the seed setting stage, because the yield of seeds and oil in this stage of stress did not have any significant difference compared to non-stressed conditions.