Effect of Rhizobium Inoculation, NPS Fertilizer and Vermicompost on Nodulation and Yield of Soybean (<i>Glycine max</i> (l). Merrill) at Bako, Western Ethiopia

Abstract

In Ethiopia, acidity-related soil fertility problems are the main production constraints, reducing productivity of major crops grown in the country. The experiment was carried out to determine influence of Blended NPS fertilizer, Seed Inoculation with Rhizobium Bacteria and Vermicompost (VC) application on soybean nodulation and yield of soybean. Factorial combinations of Rhizobium (uninoculated, inoculated), three VC levels (0, 1 and 2 t ha -1 ) and three NPS levels (50%, 75% and 100% of 100 kg NPS ha -1 ) were laid out in Randomized Complete Block Design (RCBD) with three replications. The results showed that the highest number of nodule per plant (32.0) and number of effective nodule per plant (31.4) were recorded at the combination of 2 tons VC ha -1 and 75 kg NPS ha -1 while the highest aboveground biomass (8953 kg ha -1 ) was recorded at the combination of 2 tons VC ha -1 with 100 kg NPS ha -1 . Likewise, the combination VC 2 tons ha -1 with Rhizobium inoculation (TAL-379) gave the highest number of effective nodules per plant (26.3). On the other hand, three factors interaction of Rhizobium inoculation, VC and NPS rates significantly influenced the number of primary branches (NPB), number of pod per plant, seed yield and harvest index where the highest number of pods per plant (87.6), maximum seed yield (4180 kg ha -1 ) and maximum harvest index (47%) were recorded from the plots treated with 100 kg NPS ha -1 + 2 t VC ha -1 inoculated with Rhizobium TAL-379 strain. Thus, considering the importance of integrated nutrient management in climate mitigation and adaptation; combined application of 2 t VC ha -1 and 75 kg NPS ha -1 inoculated with Rhizobium strain TAL-379 had resulted in better and optimum yield of 3870 kg ha -1 and is tentatively recommended for use.

The Effect of Giving Vermicompos Fertilizer and NPK 16:16:16 on Growth and Production of Edamame Soyabean (Glycine Max (L) Merrill)

“…The results of this study resulted in a lower number of pods when compared to the results of a study by Debela et al, (2021) which was conducted in the country of Ethiopia, the results of the research are that the maximum number of pods per plant (87.6) was produced at the combination of highest rates of the two fertilizers (100 kg NPS ha-1, 2 tons vermicompost ha-1) with inoculation whereas the minimum number of pods per plant (51.53) was recorded from plants supplied with combined 50kg NPS ha-1 with 0 ton vermicompost ha-1 without inoculation. This indicates that the synergistic effect of the mineral fertilizers and mineralization of organic manures and bio-fertilizer throughout growing period did not put the plants nutrient stress at any stage resulting in enhancing number of pods per plants.…”

Sustainable agriculture through rhizosphere bacteria for plant growth promotion, nutrient acquisition, and stress alleviation

“…Farmers can use rhizobial inoculation to maximize grain legume yields with suitable and appropriate rhizobia where a low population of local rhizobial strains predominates. Debela et al (2021) reported increased plant growth and nodulation efficiency by 80-90% through inoculation with abiotic stress-tolerant cluster bean rhizobial isolates. However, there are two most popular methods for utilizing BNF: the first is improved crop, soil, and water management to maximize BNF potential; the second is Rhizobium inoculation or host genotype selection to ensure increased nitrogen fixation in the plant (Pankievicz et al, 2019).…”

Designing a combined coulter for exemplary sowing of cereals

“…It is considered that more than 50% of crop yield increase from the total number of measures is accounted for by fertilization. Known methods of application: surface and subsurface, solid and local, separate and seedbed (Liang et al, 2014;Debela et al, 2021).…”