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Acidity Factors Limiting Nodulation, Nitrogen Fixation and Growth of PHaseolus Vulgaris L.
Bean (Phaseolus vulgaris L.) is extensively grown in tropical regions, mostly in developing countries without use of N-fertilizer. However, root nodulation and N2-fixation has been found variable under acidic conditions, when soil is used as growth medium. Conditions and techniques for achieving good nodulation of bean in continuous aerated solution culture were developed. The effects of pH on uptake and distribution of Mo in bean were studied in greenhouse and growth chamber experiments in soil and solution culture. The effects of pH and Al on nodule initiation and growth, nitrogen fixation (C2H2-reduction) and shoot and root growth were studied in solution and san culture. Growth and nitro...
NFTRR
None
Agroambientes de transição
Agroambientes de transição avaliados numa perspectiva da agricultura familiar; a vegetação da região de transição entre a Amazônia e o Nordeste, diversidade e estrutura; o cutivo em aléias como alternativa para a produção de alimentos na agricultura familiar no trópico úmido; leguminosas arbóreas como agentes de recuperação de áreas degradadas; atributos e especificidades de solos de baixada no trópico úmido; meliponicultura: uma atividade essencial para a economia familiar do trópico úmido; manejo integrado de pragas; fruteiras nativas - ocorrência e potencial de utilização na agricultura familiar do Maranhão.
