Effect of Zeolite and Calcium Silicate on Salt Stress Tolerance of Two Canola Varieties

Authors

1 MSc. student of Agronomy, Department of Agriculture, Islamshahr Branch, Islamic Azad University

2 Assistant Professor, Faculty member, Department of Agriculture, Islamshahr Branch, Islamic Azad University

3 Professor in Crop Physiology, Agronomy Department, Faculty of Agriculture, Tarbiat Modares University

4 PhD. Student, Agronomy Department, Faculty of Agriculture, Tarbiat Modares University

Abstract

One of the main reasons of crop yield reduction in Iran is salt stress and providing proper strategies is necessary for mitigating the effect of this stress. So, a factorial experiment was conducted to improve the salt stress damages on two canola varieties in a randomized complete block design with three replications at the Research Greenhouse of Agricultural Faculty of Tarbiat Modares University. Treatments included 3 levels of control, moderate, and severe salt stress (0.4, 5 and 10 dS m-1), calcium silicate at two rates (0 and 8 kg ha-1), two levels of zeolite (control and 8 ton ha-1) and two varieties, namely, Zarfam and Sarigol. Results showed that application of zeolite increased Zarfam yield in soil with a light texture and had no significant effect on Sarigol. Under moderate salinity, zeolite, and calcium silicate treatment, Zarfam produced higher oil percentage (more than 57%) compared to Sarigol at severe stress and without application of zeolite and calcium silicate. Also, Sarigol in the treatment with no salinity stress and zeolite and only application of calcium silicate had the highest oil yield while the lowest oil yield (60 percent lower) was obtained at severe stress, application of zeolite and without application of calcium silicate . In the treatment with moderate salinity and non-application of zeolite and calcium silicate, Zarfam had the highest SPAD, while Sarigol, under moderate stress, application of calcium silicate and without application of zeolite, had the lowest SPAD (more than 32% difference). Generally, salt stress reduced yield and yield components of both varieties and application of zeolite and calcium silicate decreased the damages of salt stress in some traits. Besides, Zarfam showed better response to the calcium silicate and this treatment was more effective in comparison with zeolite in both canola varieties.

Keywords

References

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Iranian Journal of Soil Research
Volume 31, Issue 3
December 2017
Pages 353-361

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