Native Bradyrhizobium Strains From Ghana Can Enhance Grain Yields of Field-Grown Cowpea and Groundnut

Osei, Ophelia; Abaidoo, Robert C.; Opoku, Andrews; Rouws, Janaína Ribeiro Costa; Boddey, Robert M.; Ahiabor, B. D. K.; Rouws, Luc Felicianus Marie

doi:10.3389/fagro.2020.00002

Cited by 5 publications

(7 citation statements)

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“…Inoculation of seeds with rhizobium strains enhances nitrogen fixation in grain legumes ( Ahiabor et al, 2014 ; Asei, Ewusi-Mensah & Abaidoo, 2015 ; Masso et al, 2016 ; Ronner et al, 2016 ; van Heerwaarden et al, 2018 ; Adjei-Nsiah et al, 2018 ; Ulzen et al, 2018 ; Osei et al, 2020 ). Yield increases range between 50% and 100% when phosphorus fertilizer is applied together with rhizobia inoculation ( Ronner et al, 2016 ; Adjei-Nsiah et al, 2018 ).…”

Section: Introductionmentioning

confidence: 99%

Soybean (Glycine max L. Merrill) responds to phosphorus application and rhizobium inoculation on Acrisols of the semi-deciduous forest agro-ecological zone of Ghana

Adjei-Nsiah

Martei

Yakubu

et al. 2022

PeerJ

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Soybean cultivation in Ghana is limited mainly to the Guinea savanna and the forest/savanna transitional agro-ecological zones. Although soybean can be cultivated in the semi-deciduous forest zone, low soil pH and limited nodulation limit its productivity in this zone. In this study, a randomized complete block design, with four replications, was used to test if rhizobia inoculation and/or p-fertilizer could improve yield of soybean in the semi-deciduous forest zone. The residual effects of the treatments were tested on maize and soybean sequentially during the 2018 and 2019 cropping seasons. The inoculation study was repeated in 2020. Phosphorus and inoculation significantly (p = 0.0009) increased soybean grain yield in the 2018 cropping season by 88% and 108%, respectively over the control. Co-application of P and inoculant increased grain yield 3-fold over the control. Maize grain yield ranged from 4.3 t ha−1 in the control plots to 5.2 t ha−1 in treated plots but did not differ significantly among treatments. In 2020, the combined application of P and inoculant produced a significantly (0.002) higher yield than any of the other treatments. This demonstrates that soybean can be grown economically in the semi-deciduous forest agro-ecological zone of Ghana. Co-application of P and inoculant appeared cost-effective, in terms of return on investment.

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Section: Introductionmentioning

confidence: 99%

Soybean (Glycine max L. Merrill) responds to phosphorus application and rhizobium inoculation on Acrisols of the semi-deciduous forest agro-ecological zone of Ghana

Adjei-Nsiah

Martei

Yakubu

et al. 2022

PeerJ

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“…It is well-established that cowpea plants have low specificity for rhizobia strains and respond to diverse strains inoculated or available in the local soil (Sena et al, 2020 ). It is worth mentioning that the cowpea research program of Ghana benefited from extensive research collaboration with Brazilian partners who introduced effective cowpea rhizobia strains, such as BR 3299, BR 3267, and BR 3262, accounting for the observed inoculation responses (Osei et al, 2018 , 2020 ). Groundnut research can benefit from similar collaboration that will help increase the yield through BNF.…”

Section: Discussionmentioning

confidence: 99%

Grain Legume Yield Responses to Rhizobia Inoculants and Phosphorus Supplementation Under Ghana Soils: A Meta-Synthesis

et al. 2022

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A discrete number of studies have been conducted on the effects of rhizobia (Rhz) inoculants, phosphorus (P) management, and combined application of Rhz and P fertilizer on the enhancement of grain legume yield across soils of Ghana and elsewhere. However, the extent to which the various inoculated Rhz strains, P application, and combined application of Rhz + P studies contribute to improving yield, performed on a comprehensive analysis approach, and profit farmers are yet to be understood. This study reviewed different experimental studies conducted on soybean (Glycine max (L.) Merr.), cowpea (Vigna unguiculata [L.] Walp), and groundnut (Arachis hypogaea [L.]) to which Rhz inoculants, P supplements, or Rhz + P combination were applied to improve the yield in Ghana. Multiple-step search combinations of published articles and multivariate analysis computing approaches were used to assess the effects of Rhz inoculation, P application, or both application of Rhz and P on yield variation. The random forest (RF) regression model was further employed to quantify the relative importance of various predictor variables on yield. The meta-analysis results showed that cowpea exhibited the highest (61.7%) and groundnut (19.8%) the lowest average yield change. The RF regression model revealed that the combined application of Rhz and P fertilizer (10.5%) and Rhz inoculation alone (7.8%) were the highest explanatory variables to predict yield variation in soybean. The Rhz + P combination, Rhz inoculation, and genotype wang-Kae explained 11.6, 10.02, and 8.04% of yield variability for cowpea, respectively. The yield in the inoculated plants increased by 1.48-, 1.26-, and 1.16-fold when compared to that in the non-inoculated cowpea plants following inoculation with BR 3299, KNUST 1002, and KNUST 1006 strains, respectively. KNUST 1006 strain exhibited the highest yield increase ratio (1.3-fold) in groundnut plants. Inoculants formulation with a viable concentration of 109 cells g−1 and a minimum inoculum rate of 1.0 × 106 cells seed−1 achieved the highest average yield change for soybean but not for cowpea and groundnut. The meta-analysis calls for prospective studies to investigate the minimum rate of bacterial cells required for optimum inoculation responses in cowpea and groundnut.

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“…Until recently, groundnut was regarded as a promiscuous grain legume that nodulated freely with indigenous rhizobia and therefore did not require inoculation during establishment. This skepticism has been challenged by the outcome of several inoculation studies (Ashraf et al, 2006;Sajid et al, 2010;Yakubu et al, 2010;Biswas and Gresshoff, 2014;Grönemeyer et al, 2016;Osei et al, 2020). Groundnut has been reported to respond positively to inoculation with effective rhizobia, leading to enhanced nodulation, BNF, and ultimately yields in Ghana and elsewhere (Ashraf et al, 2006;Sajid et al, 2010;Yakubu et al, 2010;Osei et al, 2020, Grönemeyer et al, 2016.…”

Section: Discussionmentioning

confidence: 99%

“…This skepticism has been challenged by the outcome of several inoculation studies (Ashraf et al, 2006;Sajid et al, 2010;Yakubu et al, 2010;Biswas and Gresshoff, 2014;Grönemeyer et al, 2016;Osei et al, 2020). Groundnut has been reported to respond positively to inoculation with effective rhizobia, leading to enhanced nodulation, BNF, and ultimately yields in Ghana and elsewhere (Ashraf et al, 2006;Sajid et al, 2010;Yakubu et al, 2010;Osei et al, 2020, Grönemeyer et al, 2016. The results of this study corroborate these reports as inoculation with effective native strains particularly KNUST 1002, 1031, and 1003 elicited seed yield increases of Samnut 22 and Chinese varieties at different locations, thus confirming the widely known assertion that most strains are site specific and variety specific (Date, 2000;Woomer et al, 2014).…”

Section: Discussionmentioning

confidence: 99%

Native Rhizobia Strains Enhance Seed Yield of Groundnut Varieties in Northern Ghana

Wilson¹,

Ulzen²,

Abaidoo³

et al. 2021

Front. Agron.

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Rhizobia inoculation with effective strains is an environmentally friendly approach for enhancing nodulation and yield of legumes. To obtain an ideal strain for inoculant production, the strain's performance must be matched to the environmental conditions. A 2 × 9 cross-factorial experiment laid in a randomized complete block design with three replications on farmers' fields in the northern part of Ghana was set up to evaluate the rhizobia's performance. The factors were groundnut varieties (Chinese and Samnut 22) and nine strains consisting of five native rhizobia (KNUST 1001, 1002, 1003, 1032, and 1031), two commercial strains (Biofix and BR3267), and a positive (N+) and absolute control (N–). In addition, the population of the strains was assessed after a cropping season. The strains' performance on groundnut was location and variety dependent. At Cheshegu, KNUST 1031 and 1002 significantly increased seed yield of the Chinese variety compared to other strains; however, KNUST 1031 elicited a 24% yield increase while KNUST 1002 caused a 16% yield increase over the control. Strain KNUST 1031 increased the seed yield of the Chinese variety by 24% while KNUST 1002 increased the seed yield of Samnut by 16%. Only KNUST 1002 elicited a significant seed yield increase in Samnut 22 at Cheshegu. At Binduri, strain KNUST 1003 significantly increased the seed yield of the Chinese variety by 35% relative to the control. Samnut 22 did not show a clear preference for any of the strains. The Chinese variety did not show a clear response to the strains at Tanina. However, Samnut 22 responded to KNUST 1002 as it increased seed yield by 45% relative to the control. On average, the seed yield at Tanina (846.15 kg ha−1) was less than the seed yield recorded at Binduri (1,077.66 kg ha−1) and Cheshegu (1,502.78 kg ha−1). Inoculation with strains KNUST 1002, 1003, and 1031 was all profitable under the current experimental conditions as they recorded value cost ratios (VCRs) above the threshold of 3–4. The study has shown that strains KNUST 1002, 1003, and 1031 have the potential to be used in inoculant formulation to increase groundnut production and enhance the income of smallholder groundnut farmers in northern Ghana.

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Native Bradyrhizobium Strains From Ghana Can Enhance Grain Yields of Field-Grown Cowpea and Groundnut

Cited by 5 publications

References 54 publications

Soybean (Glycine max L. Merrill) responds to phosphorus application and rhizobium inoculation on Acrisols of the semi-deciduous forest agro-ecological zone of Ghana

Soybean (Glycine max L. Merrill) responds to phosphorus application and rhizobium inoculation on Acrisols of the semi-deciduous forest agro-ecological zone of Ghana

Grain Legume Yield Responses to Rhizobia Inoculants and Phosphorus Supplementation Under Ghana Soils: A Meta-Synthesis

Native Rhizobia Strains Enhance Seed Yield of Groundnut Varieties in Northern Ghana

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