Soil amendments such as biochar and biofertilizers may improve chickpea productivity but there is limited information on whether this response could be through an increase in soil pH and nodulation. We aimed to determine whether the previously observed positive effects of biochar and rhizobium inoculation on soil pH and chickpea nodulation would result in similar improvements in the proportion of radiation intercepted by the crop canopy, biomass accumulation, and grain yield of three desi chickpea genotypes. Field experiments were carried out in clay and loamy sand soils in two successive years. Biochar application and rhizobium inoculation increased biomass accumulation, chlorophyll content, the proportion of intercepted radiation, and decreased chlorophyll a/b ratios which suggests that biochar and rhizobium inoculation increased biomass accumulation by increasing antenna size and canopy cover. Although rhizobium inoculation increased grain yield of all genotypes, the increase was greater in the best performing genotype, Acc#6. Biomass was highest at 10 t ha⁻¹ and 20 t ha⁻¹ biochar in the clay and loamy sand soil, respectively, suggesting that the lighter soils require higher biochar rates compared to the heavier soils for optimal biomass accumulation.

诸如生物炭和生物肥料之类的土壤改良剂可能会提高鹰嘴豆的生产力，但关于这种反应是否可能通过增加土壤pH值和结瘤的信息尚有限。我们的目的是确定以前观察到的生物炭和根瘤菌接种对土壤pH值和鹰嘴豆结瘤的积极影响是否会导致三种冠心鹰嘴豆基因型被作物冠层截获的辐射比例，生物量积累和谷物产量得到类似的改善。连续两年在黏土和壤质砂土中进行了田间试验。施用生物炭和接种根瘤菌可增加生物量积累，叶绿素含量，截获辐射的比例，叶绿素a / b比率降低，这表明接种生物炭和根瘤菌可通过增加天线尺寸和冠层覆盖来增加生物量积累。尽管接种根瘤菌可提高所有基因型的籽粒产量，但表现最好的基因型Acc＃6的增幅更大。生物量最高，为10吨/公顷^-1和20 t ha ^-1的生物炭分别存在于粘土和壤质砂土中，这表明与较重的土壤相比，较轻的土壤需要更高的生物炭比率，以实现最佳的生物量积累。