摘要

Cultivation techniques for Agaricus brasiliensis (composting method) and substratum formulations are the same ones used for Agaricus bisporus. Most of the carbon-tonitrogen (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%). As t谷cnicas de cultivo do Agaricus brasiliensis (m谷todo de compostagem) e formula o de substrato s o as mesmas utilizadas para o Agaricus bisporus. A maioria das rela es carbono/nitrog那nio (C/N) relatadas para A. brasiliensis s o similares 角s usadas para A. bisporus no m谷todo de compostagem. H芍 poucos estudos sobre a varia o da rela o C/N para A. brasilienses para o m谷todo ax那nico. O objetivo deste trabalho foi verificar o efeito de diferentes rela es C/N no crescimento micelial de Agaricus brasiliensis utilizando subprodutos regionais como substrato pelo m谷todo ax那nico. As rela es C/N no substrato (misturas de fibra de soja e de mandioca) estudadas variaram de 11 a 248 com consequentes concentra es de nitrog那nio de 4,25 a 0,20%, respectivamente. Concluiu-se que os substratos somente com fibra de soja propiciam maior crescimento micelial que qualquermistura com fibra de mandioca; o crescimento micelial 谷 maior no substrato com rela o C/N de 11 (N = 4,25%), intermedi芍rio na faixa de rela o C/N entre 15 e 50 (N = 3,31 e 0,98%) e menor na rela o C/N de 100 ou superior (N ≒ 0,50%).

  • 出版日期2010

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