M.A. Thesis:

Study the effect of different concentrations of Assert herbicide in soil on Chickpea (Cicer arietinum L.)٫ root morphology

Sulfonylurea herbicides residual in soil have been negative effect on crop that rotated with some crops that these herbicide used for their weed control in order to determine the most tolerant chickpea in presence of Aseert residual, an experiment was arrange as factorial experiment in sabzevar branch, Islamic Azad university in 2015.Factors were cultivar type(Adel,Arman, Azad, Bivanich,C482 and Hashem)and herbicide residual(30% Recommended dose of Assert and control). at early reproductive stage morphological characteristics such as Root Length, Root dry mater, Root volume, Root area, sum of root length Root specific weight and root/shoot ratio and physiological properties such as chl a, chl b and stem length and stem dry weight were measured. the result showed that Aseert residual decreased%39.09 stem length, 26.2% root area,33.92% root volume, 39.05% sum of root length,28.77% stem dry weih,38.16% root dry weight, 5.94% Root/shoot ratio, 19.07% chl a, 26.53% chl b and increased 38.01% root diameter compare that control. Among cultivar, Bivanich was the tolerant and Hashem the sensitive.

Keywords: herbicides residual, cultivars, root morphology, peas