Organic and inorganic fertilizer application enhances the effect of Bradyrhizobium on nodulation and yield of peanut (Arachis hypogea L.) in nutrient depleted and sandy soils of Ethiopia

Abstract

Purpose An investigation was carried out to evaluate the effect of the integrated application of organic and inorganic fertilizer effect on Bradyrhizobium effectiveness on nodulation and yield of peanut at the major growing areas of Eastern Ethiopia, Babillae and Fedis sites. Methods Systemic combination of compost, manure, Bradyrhizobium inoculation and NP application was laid out in Randomized Complete Block Design with three replications. Results The result showed that Bradyrhizobium integrated with organic inputs significantly improved the nodule number at Babillae while Bradyrhizobium when applied with DAP resulted in a significant increase of nodulation at Fedis site. The highest total biomass and total pods weight at both sites were found to record when Bradyrhizobium integrated with manure and compost. Integration of Bradyrhizobium, manure and compost at Fedis and Bradyrhizobium with manure at Babillae was found to increase the kernel yield by 44 and 66.6% over the control check, respectively. Integration of Bradyrhizobium, manure and compost at Babillae and Bradyrhizobium with starter N at Fedis significantly increased plant N accumulation. The effect of organic and inorganic application on soil N and organic carbon content was not significant at Fedis, but the slight increase was observed in Babillae site. A significant increase in the soil available P by organic and/or DAP application was found in either of the experimental sites. Conclusion Organic fertilizer when integrated with Starter N and DAP is better in improving the effectiveness of Bradyrhizobium, nodulation and yield of peanut in either of the sites.

Effect of starter nitrogen and phosphorus fertilizer rates on yield and yield components, grain protein content of groundnut (Arachis Hypogaea L.) and residual soil nitrogen content in a semiarid north Ethiopia

“…Similarly, it has been shown that residual soil N increased significantly with the application of DAP fertilizer i.e. 46 kg P 2 O 5 ha −1 combined with 18 kg N ha −1 at Babile site in Ethiopia ( Argaw, 2017 ). Chalk (1991) indicated that when N fixing crops are included in crop rotation system, the plant can satisfy all or at least part of its N requirements through BNF and the amount of fixed N in excess of the current plants requirement will be stored in the soil and benefit subsequent corps.…”

Importance of Bio-Organic Fertilizers on Peanut (Arachis Hypogaea L.) Nutrition Following Organic Farming Approach with Application of 15N Isotope Dilution Concept

“…strains combined with phosphorus fertilizer induced the best nitrogen accumulation rates in different groundnut parts (Didagbé et al 2014). Similarly, Argaw (2017) found that the highest total biomass yield, kernel yield and plant N accumulation of peanut were found where Bradyrhizobium in conjunction with organic fertilizer was applied. This shows the importance of organic fertilizer application in increasing yield of peanut.…”

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“…El ES también permitió identificar los excedentes orgánicos como el estiércol del ganado, las vainas de cacao y otros elementos vegetales que pueden ser aprovechados por los campesinos de la región en la elaboración de vermicompost, el cual es rico en microorganismos (Asadu y col., 2019;Barbero y Toso, 2006;FAO, 2013). Esto es beneficioso para los cultivos, debido a que contiene grandes cantidades de bacterias fijadoras de nitrógeno que mejora la retención de agua, la salud biológica y la capacidad de absorción del suelo, el aprovechamiento de las aguas pluviales, la actividad enzimática, la presencia de nutrientes, entre otros (Agegnehu y col., 2016;Argaw, 2017;Rayen y col., 2006;Sharma y col., 2017;Wang y col., 2016); lo que podría convertirse en una oportunidad para solucionar los problemas identificados en materia de contaminación y para apoyar el desarrollo de la agricultura responsable y sostenible.…”