Evaluation of the effects of different Rhizobium bioinoculants on growth of Phaseolus vulgaris in the tropics
Beans, like other leguminous crops in the family of Fabaceae, make up a high percentage of the food consumed by people from developing countries, especially East Africa. However, due to the problem of limited access to the use of fertilizers, they face low production which causes famine some months of the year. In Africa, inorganic fertilizers are doubly expensive compared to the other parts of the world due to the lack of an appropriate infrastructure. The use of bioinoculants can be an alternative source of fertilizers for the plants, especially leguminous for their capacity to establish a symbiotic relationship with bacteria Rhizobium sp. Together they form root nodules and can transform atmospheric nitrogen into an assimilated form to be used by the plants through the process known as Biological Nitrogen Fixation (BNF). The study was carried out at EARTH University. Three treatments used for this study included: T1: Control, T2: Commercialized Rhizobium product (Rhizobium japonicum), and T3: Rhizobium product elaborated (Experimental Rhizobium). The treatments were applied to the black beans (Phaseolus vulgaris). The objective was to establish the main procedures that could be employed by the African farmers through using the materials available on the farm to produce their own affordable bioinoculants to fertilize the crops and boost productivity. Treatment 3 and 2 increased the yield of P. Vulgaris by 44 % and 18 % respectively compared to the control. The inoculated plants presented higher growth in terms of biometric parameters including: number of leaves by 39 % and 13 %, shoot length by 50 % and 12 % for treatment 3 and 2 respectively compared to the control. Leaf nutrients analysis showed 0.72 % and 0.23 % higher content of N, and 0.3 %, 0.5 % higher content of Ca for treatment 3 and 2 respectively compared to the control. N uptake was 14.91 kg/ha, 40.89 kg/ha higher for treatment 2 and 3 respectively compared to the control. However, there was no bioinoculants effect in the soil nutrition observed between treatments using Least Significant Difference (LSD), Statistical model at p< 0.05.
| Main Authors: | , |
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| Format: | info:eu-repo/semantics/bachelorThesis biblioteca |
| Language: | eng |
| Published: |
Universidad EARTH
2019-12
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| Subjects: | FRIJOL (PHASEOLUS), PHASEOLUS VULGARIS, INOCULACION DEL SUELO, RHIZOBIUM, FIJACION DEL NITROGENO, NUTRIENTES, https://purl.org/pe-repo/ocde/ford#4.01.01, |
| Online Access: | https://repositorio.earth.ac.cr/handle/UEARTH/310 |
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