Hydrochar is rich in nutrients and may provide a favorable habitat or shelter for bacterial proliferation and survival. Therefore, in this study, we investigate the efficiency of a hydrochar-based rhizobial inoculant () on the symbiotic performance of soybean under both greenhouse and field conditions. There were positive and significant effects of hydrochar-based inoculation on the root and shoot growth of soybean as compared to uninoculated plants grown under irrigated and drought conditions. The drought stress significantly inhibited the symbiotic performance of rhizobia with soybean. Soybean inoculated with hydrochar-based produced twofold more nodules under drought stress conditions as compared to plants inoculated with a commercial preparation/inoculant carrier (HISTICK). The N concentration of inoculated plants with hydrochar-based was by 31% higher than that of un-inoculated plants grown in pots and by 22% for HISTICK. Furthermore, the soybean treated with hydrochar-based showed higher grain yield of 29% under irrigated conditions and 40% higher under rainfed condition compared to un-inoculated plants. In conclusion, the obtained results proved the potential of hydrochar-based inoculant for soybean in terms of increased symbiotic performance and agronomic traits, especially under rainfed conditions.
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| http://www.ncbi.nlm.nih.gov/pmc/articles/PMC7693707 | PMC |
| http://dx.doi.org/10.3390/microorganisms8111674 | DOI Listing |
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