Effect of Calcium silicate on Salt Stress Tolerance of Four Canola Varieties

In order to evaluate the effect of calcium silicate on salt stress tolerance of four canola varieties, a factorial experiment was conducted as randomized complete block design arrangement in factorial with three replications at the Greenhouse Research Station of Agricultural Faculty of Tarbiat Modares University. Treatments were salt stress levels at the beginning of plant flowering to seed maturation including (control, 5 and 10 dS m-1), calcium silicate (control and 8 kg hec-1) and canola varieties Zarfam, Sarigol, Hayola and RGS. Application of calcium silicate was performed with irrigation the pots simultaneously. Results showed that Sarigol in control condition of stress and Zarfam in severe stress condition produced the highest and lowest seed yield with difference of 67 percent. Application of calcium silicate increased HI. In rate of 8 percent. Zarfam and Hayola dry weight was decreased 24 percent more than the Sarigol in severe stress condition. Severe salt stress decreased oil yield significantly in all of varieties, compared to the control. In general, calcium silicate application increased yield and some yield components. At severe salt stress, calcium silicate increased spad in Zarfam and Sarogol varieties.