Effect of Cobalt, Molybdenum and Rhizobium on Yield of Soya Beans in Kisii County, Kenya

Authors

  • Ombuna Dorice Department of Agriculture and Rural Development, Kenya Methodist University, Kenya
  • Mworia Mugambi Department of Agriculture and Rural Development, Kenya Methodist University, Kenya
  • Muchiri John Department of Agriculture and Rural Development, Kenya Methodist University, Kenya

Keywords:

Agronomic, Combination, Nitrogen, Phosphorus, Fixation, Production, Treatments, Soil

Abstract

Introduction: Soybean is a leading source of protein and oil used for human consumption and livestock feed, also considered a valuable crop globally. The leading producers worldwide are United States of America, Brazil and China that produce as high as 89.9 Million tonnes annually. In Kenya, the beans are mainly grown in the western and central regions of Kenya, and the average yield is 363 kgha-1. This is low compared to the other countries, the poor yield in Kisii County is associated to low soil fertility, poor agronomic practices and acidified soil. Additionally, insufficient nitrogen and phosphorus in soil, use of unimproved seed varieties and poor management practices are causes.

Objectives: The study aimed at evaluating the effects of molybdenum, cobalt and rhizobium inoculants on yield of soya beans in Kisii County.

Research methodology: A randomised complete block design experiment was carried out at Kisii Agricultural Training Centre. Seeds were coated with ttreatments that included: Control (WT), DAP, Rhizoliq Top Soya 3m/kg, Wuxal Extra COMO1.5 at 1m/kg of seed, Wuxal Extra COMO 1.5 at 1.5 mls/kg of seed, (Wuxal Extra COMO 1.5 at 1.5 mls/kg / Rhilizic top 3mls) and (Waxul Extra15 COMO1m/Rhizoliq top 3ml/kg) of soya seed. Parameters collected were manipulated using SPSS Version 24.0, and tested using ANOVA (95% CI). Statistically significant results were further subjected to DMRT post hoc test.

Results: Soil analysis showed moderately acidic (pH 5.5) soil low nitrogen (0.12%), moderate Phosphorus (20ppm) and low potassium levels (40%).  The highest effect on six plants pod weight was shown by COMO1ml+ Rhizobium treatment. The treatments were statistically significant (p=0.004) and COMO1ml+Rhizob was highest on DMRT. Highest effect on 100 seeds weight was also seen with COMO1.5ml+Rhizob and p value (<0.001).DMRT showed como1.5 + Rhizob to be the highest. Further, COMO1ml+Rhizob indicated the highest effect on yield Kg per ha, (p=0.006). Weight of seeds of the plot was shown to be influenced highly by COMO1ml+Rhizob with (p=0.005). COMO1ml+Rhizob had the highest mean on DMRT.

Conclusion: Use of inoculant in combination in improving low yield (COMO+Rhizob) at different graded levels is recommended. Research to evaluate the effects of nitrogen and phosphorus levels on soya bean production in Kisii is highly recommended.

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Published

2020-07-31

How to Cite

Dorice, O., Mugambi, M., & John, M. (2020). Effect of Cobalt, Molybdenum and Rhizobium on Yield of Soya Beans in Kisii County, Kenya. International Journal For Research In Agricultural And Food Science, 6(6), 08–19. Retrieved from https://gnpublication.org/index.php/afs/article/view/1348