Enhancing Yield and Yield Components of Common Bean (Phaseolus vulgaris L.) Varieties by Integrated Blended NPS and Bio-fertilizer in Misrak Meskan District, Central Region, Ethiopia

Abstract

Low available phosphorus, total nitrogen, sulfur, and lack of selected cultivars are the main obstacles to the production of common beans in the research area. An experiment was conducted at Misrak Meskan in 2022 to determine the optimal combination of parameters for maximum yield in common bean types. The study evaluated three levels of NPS fertilizer (0, 100, and 200 kg/ha), two levels of Rhizobium (with and without), and four common bean types (Hawassa Dume, SER119, SER125 and Rori) using Randomized Complete Block Design, with three replications of factorial arrangement. The findings demonstrated substantial differences between the types in the harvest index, biomass, grain yield, and seeds pod-1 . NPS rates significantly influenced all studied parameters. Rhizobium inoculation significantly influenced the nodulation, seeds pod-1 , and harvest index. The interaction of NPS with variety was significantly affected plant height, seed pod-1 and grain yield (2.83 ton ha-1 ) was obtained from Hawassa Dume at 200kg ha-1 . Rhizobium inoculated type significantly influenced pods plant-1 and seeds pod-1 . The three-way interaction had significant effects on plant height, seeds pod-1 , biomass, and harvest index. The economic analysis showed the highest net returns from NPS rate 100 kg/ha for variety Hawassa Dume NB 108,871ETB/ha and MRR 504.9%. Based on agronomic performance and economic analysis, use of Hawassa Dume at 100kg ha-1NPS can be recommended to enhance productivity in the study site and areas with similar agro-ecology. However, the result of the present study need to be evaluated and reconfirmed preferably in more sites to reach a conclusive recommendation.