Biologic dinitrogen fixation and nutrient cycling in cover crops and their effect on organic Conilon coffee
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Data
2011-09
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Resumo
Notwithstanding its relevance, studies regarding nutrient cycling and biological dinitrogen fixation in
Conilon coffee (Coffee canephora cv. Conilon) associated with cover plants are very scarce. Aiming to
evaluate the contribution of cover crops for organic conilon production, a field experiment was carried
out consisting of Pennisetum glaucum, and legume species Canavalia ensiformis, Mucuna deeringiana
and Cajanus cajan (inoculated and non inoculated) cultivated between coffee trees, and spontaneous
vegetation as cover crops. The experiment was carried out in Espírito Santo State- Brazil, in a 6.5 years
old coffee crop production system. Chemical analyses of soil and vegetative parts of spontaneous and
cover crops, as well as coffee leaf nutrients concentration were performed. Biological Nitrogen Fixation
(BNF) was determined by the natural abundance method. BNF contributed with about 80% of the
nitrogen accumulated by the leguminous plants, corresponding to 27 - 35 kg of N ha -1 . Concentration
and accumulation of nutrients varied among cover crops. Rhizobium inoculation did not influence
nutrient cycling or BNF. Legume plants partially supplied the nitrogen requirements of Conilon coffee.
No significant effect of the treatments was observed on the nutrient concentration of Conilon coffee or
on plant growth.
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Coffea canephora, Isotopic composition, Nutrient recycling, Sustainable agriculture, Biological dinitrogen fixation, Coffea canephora, Reciclagem de nutrientes, Composição isotópica, Fixação biológica de nitrogênio, Agricultura sustentável
Citação
PARTELLI, Fábio Luiz; VIEIRA, Henrique Duarte; FERREIRA, Enderson Petrônio de Brito; VIANA, Alexandre Pio; ESPÍNDOLA, José Antonio Azevedo; URQUIAGA, Segundo; BODDEY, Robert Michael. Biologic dinitrogen fixation and nutrient cycling in cover crops and their effect on organic Conilon coffee. Semina: ciências agrárias, v. 32, n. 3, p. 995-1006, July/Sept. 2011.