Effect of application of a superabsorbent polymer on physiological traits of dry land wheat cultivars

In order to study the effects of a superabsorbent polymer on yield and yield components of dry land wheat cultivars، a field experiment was carried out in factorial arrangement using randomized complete block design with four replications on research field in Khomein city، during 2010-2011 cropping season. The experimental factors included three dry land cultivars called Azar2، Sardari، Rasad and four levels of superabsorbent polymer of 0، 10، 20 and 30 kg per hectare. Average length of flag leaf، relative water content، ionic leakage percentage، remobilization rate، current photosynthesis and grain yield were recorded. Results showed that the effect of superabsorbent and cultivars on average length of flag leaf، relative water content، ionic leakage percentage، remobilization rate، current photosynthesis and grain yield was significant. Maximum grain yield was 1161 kg ha-1، obtained by application of 30 kg ha-1 superabsorbent polymer and Azar2 cultivar. Minimum grain yield was 855 kg ha-1 belonged to Sardari cultivar without superabsorbent polymer. Appling super absorbent polymer from 10 to 30 kg per hectare، increased grain yield significantly.