Effects of super absorbent polymer, zinc and selenium application on yield and yield components of durum wheat

In order to effects of application of super absorbent polymer، zinc and selenium on yield and yield components of durum wheat، an experimental was carried out as factorial based on complete randomized block design with four replicates in the research station of Islamic Azad University- Arak Branch، Iran in 2010-2011. Experimental factors were super absorbent in two levels of control and 25 kg/ha، zinc sulfate in three levels of control، 25 and 50 kg/ha and selenium in two levels of control and 20 kg/ha. The results showed that the effect of zinc sulfate on the yield and yield components was significant at 1% level. Application of 50 kg/ha zinc sulfate increased grain yield by 13. 6% as compared with control. The interaction effect two-way treatments showed that foliar application of selenium along with 50 kg/ha zinc sulfate increased grain yield by 14%. The consumption of 25 kg/ha also super absorbent along with 50 kg/ha zinc sulfate increased grain yield by 18%. The results showed that application of 25 kg/ha super absorbent، 50 kg/ha zinc sulfate and selenium spraying increased grain yield by 19 % as compared with control.