Nitrogen Fixation Ability on Common Bean (Phaseolus vulgaris L.) cultivars with Some types of Inoculants which contain different strains of Rhizobium leguminosarum; bv. phaseoli was evaluated in an experimental design. In this investigation three types of biological fertilizers such as Rb117, Rb123, Rb136 and a commercial inoculants (Rhizobean super plus) with two treatment N100 (use of 100 Kg nitrogen/ha) and control (without seeds inoculated and fertilizer) and three bean cultivars: COS16 (spotted bean), Derakhshan and Akhtar (red beans) used as factorial experiment in randomized complete block design in 2006 and 2007 in Zanjan province(Khoramdareh Region). Combined Analysis preformed with SAS9.2 of statistical program and graphs were provided by Excel and Σplot programs and means comparison were done with Duncan,s Multiple Range Test. Rb117 strain was showed an 59 percent increasing in seed yield compared with non-inoculants treatment. Among of inoculants the effect of Rb123 strain, was at least (32%) in compared with others. The results showed that significant difference in seed yield, nitrogen percent per plant, seed protein percentage, number and weight of nodules (50 day after emergence),seed and dry matter yield were observed among seed inoculated and non-inoculated. Most protein percent were achieved from 100 kg nitrogen, and Rb117 treatment (About 24%) and highest protein yield (864 kg/ha) was gained from Rb117 and lowest protein yield was produced from control. Among of all inoculants (or strains of Rhizobium leguminosarum;bv.phaseoli) The Rb117 strain has more effectiveness on common bean, as compared with other strains. In three cultivars the COS16 line was successful in compared with other cultivars. High seed yiel...
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...were in grains of COS16 variety, with inoculation by Rb117 (mean 19.6g per kg of seed dry matter). That is 33% higher than the lowest mean values. Interaction of inoculation and varieties on potassium accumulation showed in Fig. 2.
Fig. 2: Interaction of inoculation and varieties on grain potassium accumulation.
The mean comparison results show, that the effect of inoculants and fertilizer treatments has been significant on average K uptake in above ground dry matter. So that the highest means were obtained by inoculation treatments and the lowest mean related to control. Control with mean 17.48 and Rb117 inoculated with average 21.8 g potassium /kg dry matter. Effect of inoculation and fertilizer treatments on the mean phosphorus absorption of dry matter per kg of seed, has been significant and their class has statistically different.