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International Journal Of Horticulture, Agriculture And Food Science(IJHAF)

Impacts of Plant Growth Promoting Rhizobacteria Inoculation Configurations on Vegetative Growth, Nodulation and Yield of Bambara groundnut [Vigna subterranea (L.) Verdc.]

E. E. Ikenganyia , M. A. N. Anikwe , O. E. Ngwu

International Journal of Horticulture, Agriculture and Food science(IJHAF), Vol-2,Issue-3, May - June 2018, Pages 54-69, 10.22161/ijhaf.2.3.5

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The main objective of this study is determine the responses of Bambara groundnut [Vigna subterranea (L). Verdc.] to application methods of plant growth promoting rhizobacteria inoculant and time of sowing after inoculation in Agbani area of Enugu, South East Nigeria. Field trials were conducted at the Teaching and Research Farm of the Faculty of Agriculture and Natural Resources management, Enugu State University of Science and Technology in 2015 and 2016 planting season. The experiment was a 2 × 3 factorial trial in a randomized complete block design with three replications. The treatments consisted of two different rhizobacteria inoculant application methods (seed applied method and soil applied method) and three different periods of sowing after inoculation (0 min, 15 mins and 30 mins) in all possible combinations (six treatment The obtained results revealed that Bambara groundnut cultivated on soils fertilized with ten grams of rhizobacteria inoculant per planting hole significantly (p < 0.05) had highest vegetative growth, number of nodules per plant and yield traits in both planting season. The main effect of time of sowing indicated that plants sown 30 minutes after inoculation significantly (p < 0.05) gave the tallest plants and leaf area index per plant in 2015 and 2016 planting season than the other time regime. The interaction effect of rhizobacteria inoculant application methods and time of sowing after inoculation were observed to be significant (p < 0.05) in 2015 and 2016 planting season. The results showed that the plants on soil with combined use of soil applied method of inoculation treatment and 30 minutes after inocualtion before planting significantly (p < 0.05) had the highest vegetative growth, number of nodules per plant and yield parameters than the other interaction effect. The combined use of soil applied method of inoculation treatment and 30 minutes after inocualtion before planting is recommended for the cultivation of Bambara groundnut in Agbani Area South East Nigeria.

Bambara groundnut, growth, nodulation, phosphate fertilizer, rhizobacteria inoculant, yield.

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