Effect of water stress, taking zeolite and salicylic acid on yield and yield components of spring safflower

In order to study the effect of water stress، taking zeolite and salicylic acid on yield and yield components of spring safflower، an experimental was done in 2010. Experiment was performed as split factorial based on RCBD with 4 replications. Water stress was selected as major factor in three levels (I0 = Irrigation water requirement plants as control، I1 = 85% and I2 =70% of the amount of irrigation water requirements) in the main plots and consuming different amounts of zeolite at three levels (Z0= not taking zeolite as control، Z1= zeolite amount consumed 4 tons per hectare and Z2= zeolite consumption amount consumed 8 t. ha-1) and two levels of salicylic acid SA0= no salicylic acid and SA1= consumption and sprayed salicylic acid) as a minor factor in a factorial combination of sub-plots were placed. The results showed that the effect of different levels of water stress on traits such as plant height، boll number per plant، grain per boll، yield of boll grain and biological yield in sub-percent probability level was significant. Also، different levels of consumption zeolite on the characteristics such as، the number of boll per plant، seeds per boll، grain yield and biological yield in sub-attribute level and statistical plant height in a percentage level of 5% were significant. Salicylic acid also taking on the characteristics such as number of grain per boll and yield levels was statistically significant in a percentage. Among different levels of water stress، the highest and lowest average grain yield 954. 75 and 455. 29 kg ha-1، respectively، related to irrigation and 70% based on 100% water plant was needed. Also between different levels of maximum and minimum consumption of zeolite with an average grain yield 823. 58 and 589. 33 kg ha-1 respectively consumed 8 tons of treated zeolite and zeolite used was not treated.