Effects of drought stress and Bradyrhizobium japonicum bacteria strains on quantities and qualities characteristics in Soybean (Clark cv.)
Subject Areas : New Finding in Agriculture
Amin Farnia
1
(دانشگاه آزاد اسلامی، واحد بروجرد، گروه زراعت و اصلاح نباتات، بروجرد، ایران.)
Hamid Madani
2
(دانشگاه آزاد اسلامی، واحد اراک، دانشیار گروه زراعت و اصلاح نباتات، اراک، ایران.)
Keywords: Protein, Drought stress, yield, soybean, Bradyrhizobium japonicum strains,
Abstract :
In order to evaluate grain yield, protein and oil percent in Soybean (Clark cv.) under the condition of drought stress and also efficiency of Bradyrhizobium japonicum strains, the research was performed an experiment during 2003-2004 within split plot design based on RCBD with three replications in the Agriculture Research Institute of Borujerd. The treatment of irrigation was selected as the main plot with three levels of drought stress, namely low stress (85% plant water requirement), medium stress (70% plant water requirement), high stress (55% plant water requirement) and also the plot as complete irrigation as control. The subplot was Bradyrhizobium japonicum strains made use of three stains including, Helinitro, Rizoking, Nitragin and also a level without use of bacteria strain (control). The amount of irrigation water calculated with the help of plant water requirement and the atmometer. In time of planting were inoculated seeds with bacteria strains. And then biological yield, grain yield, grain harvest index and grain hundred weight determined. The results indicated which grain yield was different under two conditions, stress and control irrigations ones. In the optimal irrigation of maximum of grain yield and biological yield produced by Nitragin bacteria strain. In the stress conditions, the efficiency of bacteria strains were different as under low and medium stresses, grain and biological yield obtained by Rizoking bacteria strain; so this strain had a adaptation with drought stress, but in high stress no different within all of the bacteria strains were observed.
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