Evaluation of Electrical Conductivity, Chlorophyll and Seed ‎Yield of Wheat under Water Stress with Zeolite Application

Electrical conductivity of wheat cell sap and chlorophyll concentration of its leaves under drought stress and application of zeolite were evaluated in a split plot experiment, by using a RCBD with three at Arak Payam-Noor University in 2010. Treatments were four levels of water stress (I0= control irrigation, I1= irrigation at 85% of I0, I2= irrigation at 70% of I0, I3= irrigation at 55% of I0) assigned to the main plots and four levels of zeolite applications (Z0= without zeolite application, Z1= 3 t.ha-1, Z2= 6 t.ha-1, Z3= 9 t. ha-1) to the sub plots. Sub plots consisted of 4 rows of 5 m long spaced 50 cm apart and 20 plants per meter on the rows. In this study traits like peduncle length, awn length, number of spike per m-2, grain yield, electrical conductivity by using water with 50and 60oC were assessed. Results indicated that intraction effect of water stress and zeolit application on number of spike per m2, seed yield, and electrical conductivity at 50and 60oC water were significant. Mean comparisons of intraction effects showed that electrical conductivity of water with 50 and 60 oC (447 and 476 respectively) resulted in the least detrimental effect on cell membrane. Results also revealed that electrical conductivity at control irrigation (554 µs.cm-1) and application of 9 t.ha-1 of zeolit produced highest seed yield (4901 kg.ha-1) at wheat.