Citas bibligráficas
Sierra, C., (2025). Efectividad De Bacterias Fijadoras De Nitrógeno Simbióticas En Stylosanthes Guianensis De Parcelas De Recuperación De Minería Aurífera Madre De Dios [Universidad Nacional Agraria La Molina]. https://hdl.handle.net/20.500.12996/6881
Sierra, C., Efectividad De Bacterias Fijadoras De Nitrógeno Simbióticas En Stylosanthes Guianensis De Parcelas De Recuperación De Minería Aurífera Madre De Dios []. PE: Universidad Nacional Agraria La Molina; 2025. https://hdl.handle.net/20.500.12996/6881
@misc{renati/1060356,
title = "Efectividad De Bacterias Fijadoras De Nitrógeno Simbióticas En Stylosanthes Guianensis De Parcelas De Recuperación De Minería Aurífera Madre De Dios",
author = "Sierra Redhead, Cristian Richard",
publisher = "Universidad Nacional Agraria La Molina",
year = "2025"
}
The forests of Madre de Dios face a serious threat due to alluvial gold mining, which has caused deforestation and ecosystem degradation. This study focuses on the nodulation capacity of symbiotic nitrogen-fixing bacteria associated with the plant Stylosanthes guianensis in areas degraded by gold mining. The main objectives were to characterize the bacterial strains, evaluate their nodulation capacity and analyze their influence on plant growth in a mining substrate under greenhouse conditions. The results revealed the presence of nitrogen-fixing bacteria with morphological characteristics compatible with the genera Bradyrhizobium and Rhizobium in the nodules of Stylosanthes guianensis. Bacteria isolated in the laboratory and inoculated under controlled conditions showed a significant impact on the development of Stylosanthes guianensis, promoting growth and the formation of effective nodules in all conditions evaluated (50 and 75dds), compared to control treatments. In addition, it was found that strains from San Jacinto showed a higher yield than those extracted from Huantupa, suggesting that bacterial populations associated with older Stylosanthes guianensis installations may be better adapted to gold mining conditions, characterized by sandy soils, low nutrient availability, acid pH and low organic matter content. This study highlights the importance of continuing to investigate the species involved in biological nitrogen fixation and identifying the most effective inoculants to improve the forage performance of Stylosanthes guianensis in the shortest possible time. Key words: Stylosanthes guianensis, nitrogen fixation, inoculation, mining
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