<abstract xmlns="http://www.w3.org/1999/xhtml">Arbuscular mycorrhizal fungi (AMF) can be used to promote the productivity of legumes on phosphorus- (P) deficient soils. The present study investigates the inoculation effects of three AMF species (<italic>Funneliformis mosseae</italic>, <italic>Rhizophagus intraradices</italic>, and <italic>Claroideoglomus etunicatum</italic>) and the control (uninoculated) on nitrogen fixation efficiency and growth performance of tropical soybean cultivar (TGx1448-2E) under varying P fertilizer rates (0, 20, and 40 kg P2O5 ha−1) in a derived savannah of Nigeria. The results showed that shoot and root dry matter, number of nodules, relative ureide abundance (RUA), nitrogen derived from atmosphere (Ndfa), total N fixed, shoot P uptake, grain, and biomass yield significantly increased with AMF inoculation, with better performance observed in plants inoculated with <italic>Rhizophagus intraradices</italic> and <italic>Funneliformis mosseae</italic> compared to <italic>Claroideoglomus etunicatum</italic>. Similarly, the soybean growth variables, P uptake, and nitrogen fixation activities increased with increasing P application rates. Conversely, AMF root colonization significantly reduced with increasing P rate. Interaction of AMF inoculation and P rates significantly influenced soybean growth and nitrogen fixation. <italic>R. intraradices</italic> inoculation with 20 kg P2O5 ha−1 resulted in the highest amount of RUA, Ndfa, N fixed, and grain yield. It could be concluded from this study that <italic>R. intraradices</italic> with moderate P rate could be used to enhance nodulation, nitrogen fixation, and soybean yield in P-deficient soils.</abstract>

Arbuscular mycorrhizal fungi (AMF) can be used to promote the productivity of legumes on phosphorus- (P) deficient soils. The present study investigates the inoculation effects of three AMF species (Funneliformis mosseae, Rhizophagus intraradices, and Claroideoglomus etunicatum) and the control (uninoculated) on nitrogen fixation efficiency and growth performance of tropical soybean cultivar (TGx1448-2E) under varying P fertilizer rates (0, 20, and 40 kg P2O5 ha−1) in a derived savannah of Nigeria. The results showed that shoot and root dry matter, number of nodules, relative ureide abundance (RUA), nitrogen derived from atmosphere (Ndfa), total N fixed, shoot P uptake, grain, and biomass yield significantly increased with AMF inoculation, with better performance observed in plants inoculated with Rhizophagus intraradices and Funneliformis mosseae compared to Claroideoglomus etunicatum. Similarly, the soybean growth variables, P uptake, and nitrogen fixation activities increased with increasing P application rates. Conversely, AMF root colonization significantly reduced with increasing P rate. Interaction of AMF inoculation and P rates significantly influenced soybean growth and nitrogen fixation. R. intraradices inoculation with 20 kg P2O5 ha−1 resulted in the highest amount of RUA, Ndfa, N fixed, and grain yield. It could be concluded from this study that R. intraradices with moderate P rate could be used to enhance nodulation, nitrogen fixation, and soybean yield in P-deficient soils.

Nodulation and biological nitrogen fixation in soybean (<italic>Glycine max</italic> L.) as influenced by phosphorus fertilization and arbuscular mycorrhizal inoculation

Department of Soil Science and Land Management

Department of Plant Physiology and Crop Production

Acta Universitatis Sapientiae, Agriculture and Environment

This work is licensed under the Creative Commons Attribution-NonCommercial-NoDerivatives 4.0 International License.

Nodulation and biological nitrogen fixation in soybean ( L.) as influenced by phosphorus fertilization and arbuscular mycorrhizal inoculation

Arbuscular mycorrhizal fungi (AMF) can be used to promote the productivity of legumes on phosphorus- (P) deficient soils. The present study investigates the...

Nodulation and biological nitrogen fixation in soybean (Glycine max L.) as influenced by phosphorus fertilization and arbuscular mycorrhizal inoculation

Published Online: Dec 28, 2020

Page range: 22 - 44

Received: Feb 12, 2020

Accepted: Mar 29, 2020

DOI: https://doi.org/10.2478/ausae-2020-0003

Keywords
biological nitrogen fixation, mycorrhizal fungi isolates, phosphorus uptake, ureide assay, soybean productivity

© 2020 Adeniyi Adebowale Soretire et al., published by Sciendo

This work is licensed under the Creative Commons Attribution-NonCommercial-NoDerivatives 4.0 International License.

Nodulation and biological nitrogen fixation in soybean (Glycine max L.) as influenced by phosphorus fertilization and arbuscular mycorrhizal inoculation

Published Online: Dec 28, 2020

Page range: 22 - 44

Received: Feb 12, 2020

Accepted: Mar 29, 2020

DOI: https://doi.org/10.2478/ausae-2020-0003

Keywordsbiological nitrogen fixation, mycorrhizal fungi isolates, phosphorus uptake, ureide assay, soybean productivity

© 2020 Adeniyi Adebowale Soretire et al., published by Sciendo

This work is licensed under the Creative Commons Attribution-NonCommercial-NoDerivatives 4.0 International License.

Keywords
biological nitrogen fixation, mycorrhizal fungi isolates, phosphorus uptake, ureide assay, soybean productivity