Viabilidade da inoculação de soja com estirpes de Bradyrhizobium em solo inundado
作者： D. Scholles , L. K. Vargas
DOI: 10.1590/S0100-06832004000600005
关键词: Field capacity 、 Dry matter 、 Waterlogging (agriculture) 、 Bradyrhizobium japonicum 、 Nitrogen fixation 、 Dry weight 、 Water content 、 Bradyrhizobium elkanii 、 Agronomy 、 Biology
摘要: Soybean can be a viable alternative crop for lowlands. However, soybean relies on biological nitrogen fixation, process that is normally affected by soil flooding, depending the macrosymbiont genotype. Moreover, behavior of different bradyrhizobia strains in flooded yet unknown. The present research aimed to evaluate efficiency Bradyrhizobium elkanii and japonicum recommended comparison mineral fertilization, soil. experiment was carried out greenhouse, where cultivar CEP 20 sown pots with treatments applied were either inoculation one Bradyrhizobia strains: SEMIA 587, SEMIA 5019, SEMIA 5079 or SEMIA 5080, application 100 mg kg-1 at two moisture levels - 100% field capacity 1 cm-water layer surface. 14 days after plant emergence it maintained under such conditions 30 days. nodule number dry matter, shoot matter evaluated 46 75 days emergence. amount accumulated determined Soil flooding reduced mass both evaluation periods. There no difference among plants inoculated distinct strains, which less than treatment nitrogen. second period as compared same capacity. also lower Results show fixation hobut, when waterlogging cease nodulation recovered. Plants fertilized are flooding.
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