Reducing effects of drought stress by application of Humic acid, Mycorrhiza and Rhizobium on chickpea

This paper studies the effect of drought stress on Chickpea using the biological agents, with supplemental irrigation during the plant growth. A field experiment was conducted, as split-factorial based on randomized complete block design with three replications, at the Experimental Farm at Campus of Agriculture and Natural Resources of Razi University in 2010-2011. The main plots consisted of the supplemental irrigation at time of the flowering and non-use of supplemental irrigation and sub-plots were use and non-use of the Mycorrhiza, Rhizobium and Humic acid as factorial. The results showed that the effect of the supplemental irrigation on contents of the chlorophyll (a, b and total), soluble sugar and leaf area of the chickpea was significant. Application of the supplemental irrigation with use of biological and symbiosis agents (Humic acid and Rhizobium), can be effective in improving physiological traits of the chickpea.