Selection of chickpea cultivars with agronomic phosphorus (P) utilization characters as influenced by Rhizobium inoculation

摘要

Evaluation of phosphorus (P) efficient chickpea cultivars with and withoutRhizobiuminoculation will provide considerable genetic resources for sustaining the yields and quality with reduced P application under the P deficient conditions on agricultural fields. For this aim, a pot experiment was conducted using a Calcareous Usthochrepts soil. Twenty different chickpea cultivars (Cicer arietinumL.) with and without bacterium (Rhizobium ciceri)inoculated were used for this study. Phosphorus fertilizer as H3PO3at the levels of 0 and 80 mg P kg-1was applied to the pots. Nitrogenous fertilizer at the level of 60 mg N kg-1as ammonium nitrate was applied to all pots for normal growth. After harvesting of chickpeas, total P concentrations in the plants were determined. As a result of the study,rhizobiuminoculation and phosphorus application in combination increased growth rate and P utilization of chickpea cultivars as compared to the control. Whereas, significant variability among the chickpea cultivars for P utilization characters have also been observed depending on P treatment andrhizobiuminoculation. Efficiency Index (EI) parameters were used to select chickpea cultivars with bacterium (R. ciceri)improved P utilization characters. This method provided characterization of cultivars as ER: efficient-responsive, ENR: efficient non-responsive, IR: inefficient responsive and INR: inefficient non-responsive. Based on this classification, chickpea cultivars of Ayd?n, Akçin-91, ILC-482 were called as ENR under non-inoculated conditions, however chickpea cultivars of Küsmen-99, Er-97, Diyar-95, Ayd?n, Akçin-91 were called as ENR under the rhizobial inoculated conditions. It has been established from the results that P treatments with and withoutrhizobiuminoculation greatly affected the P Efficiency Index (EI) and P utilization performance of chickpea cultivars.