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Idesia (Arica)

versão On-line ISSN 0718-3429

Resumo

PERALTA-ANTONIO, Nain; BERNARDO DE FREITAS, Gilberto; WATTHIER, Maristela  e  SILVA SANTOS, Ricardo Henrique. Compost, bokashi and efficient microorganisms: their benefits in successive crops of broccoli. Idesia [online]. 2019, vol.37, n.2, pp.59-66. ISSN 0718-3429.  http://dx.doi.org/10.4067/S0718-34292019000200059.

Compost, bokashi and efficient microorganisms (EM) are viable alternatives for the nutrition of agricultural crops produced of organic form. Its application affects the first crop and subsequent crops. The objective was to evaluate the effect of compost, bokashi and EM on the growth, production of fresh matter and dry matter in two consecutive broccoli crops. In the first broccoli crop were applied: 191 ha-1 of compost (C19), 191 ha-1 compost + EM 2% (C19+EM2), 15 t ha-1 compost + 2 t ha-1 of bokashi (15C+B2), EM 2% (EM2), 10 t ha-1 of bokashi (B10) and control without fertilization (CWF). In the second crop broccoli the residual effect was evaluated, without additional fertilization. Similar canopy area was observed between treatments in the first and second broccoli crop. Greater amount of dry matter was obtained with C19, C19+EM2 and B10 in comparison with CWF. In the first broccoli crop the treatment with highest amounts of dry matter was C19+EM2. The residual effect of treatments was greater with B10 because promoted higher stem fresh matter compared to EM2 and CWF. The organic fertilization did not affect the growth of plants in the first and second broccoli crop. Exclusive fertilization of compost and bokashi, applied alone or together, promote greater fresh matter than unfertilized plants in the first broccoli crop. EM potentiates the effect of the compost, since its joint application stimulates more fresh matter and dry matter than unfertilized plants in the first crop. In soils with medium or high fertility, compost applied alone or in conjunction with bokashi or EM only has a short-term effect, as they did not promote residual effect in the second broccoli crop.

Palavras-chave : Brassica olerácea L. var. itálica; Organic agriculture; Microbial biomass; Phenological cycle.

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