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Acta Scientiarum. Agronomy

versión On-line ISSN 1807-8621

Resumen

ZAGHI JUNIOR, Lienine Luiz; LINDE, Giani Andrea  y  COLAUTO, Nelson Barros. Carbon-to-nitrogen ratios for Agaricus brasiliensis on the axenic method. Acta Sci., Agron. (Online) [online]. 2010, vol.32, n.1, pp. 55-60. ISSN 1807-8621.  http://dx.doi.org/10.4025/actasciagron.v32i1.508610.4025/actasciagron.v32i1.5086.

Cultivation techniques for Agaricus brasiliensis (composting method) and substratum formulations are the same ones used for Agaricus bisporus. Most of the carbon-to-nitrogen (C:N) ratios reported for A. brasiliensis are similar to those used for A. bisporus on the composting method and there are few studies about the variation of C:N ratios for A. brasilienses on the axenic method. The objective of this study was to verify the mycelial growth of A . brasiliensis on different C:N ratios using regional by-products as substrate formulation on the axenic method. Studied C:N ratios of substrate (mixture of soybean and cassava fibers) ranged from 11:1 to 248:1, with nitrogen content ranging from 4.25 to 0.20%, respectively. It was concluded that substrate with only soybean fiber generates higher mycelial growth than any formulation with cassava fiber; the highest mycelial growth on substrate is with C:N ratio of 11:1 (N = 4.25%); the intermediate growth is with C:N ratio range from 15:1 to 50:1 (N from 3.31 to 0.98%); and the lowest growth is with C:N ratio of 100:1 or higher (N < 0.50%).

Palabras llave : Agaricus blazei; mycelial growth; substrate; cultivation.

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