Producción, evaluación y caracterización microbiológica de un biofertilizante artesanal para la fijación de nitrógeno en especies vegetales forrajeras.
The increased production of grasslands in Ecuador has necessitated the use of chemical fertilizers, as in the case of commercial urea, which has caused impacts on agricultural land. As an alternative to this chemical fertilizer , developed , tested and characterized a craft biofertilizer made...
| Autor Principal: | Reyes Villegas, María Isabel |
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| Formato: | bachelorThesis |
| Idioma: | spa |
| Publicado: |
2016
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| Materias: | |
| Acceso en línea: |
http://dspace.ups.edu.ec/handle/123456789/12559 |
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| Sumario: |
The increased production of grasslands in Ecuador has necessitated the use of chemical
fertilizers, as in the case of commercial urea, which has caused impacts on agricultural
land. As an alternative to this chemical fertilizer , developed , tested and characterized a
craft biofertilizer made from roots of alfalfa ( Medicago sativa) , White Clover ( Trifolium
repens ) and rye grass ( Lolium perenne), which has diazotrophic microbiological activity
of bacterial species such as Azospirillum Azotobacter and Pseudomona. Within the field
phase an experimental design of randomized complete block with 3 replications, and a
total of 30 experimental units was used; these experimental units were subjected to 9
treatments corresponding to bio-fertilizers made with different concentrations of roots
(150, 200 and 250 grams) collected at 3 different altitudes (2800-3000; 3000-3200 and
3200-3400 m.s.n.m.) in front of a control treatment. For microbiological experimental
part, plantings were made in specific means LG, Nfb and Cetrimida; bacterial species were
identified by physical tests and biochemical tests MicroGen®.
Laboratory results showed the presence of Azotobacter and Azospirillum by physical
evidence and Pseudomonas by physical and biochemical tests; in the field phase, an
important difference of 9 treatments together was found compared to the control treatment
in zootechnical terms, causing increases in stocking rate of 53% in the mixture Lolium
perenne and Trifolium repens, and 8% in Medicago sativa monoculture in the third cut. |
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