Abstract: | This work reports results of mycelial yield of Trichoderma viride from a number of carbon and nitrogen sources and different C:N ratios. The ratios were in two series: first by increasing the carbon content (d-glucose as standard), second – by decreasing the nitrogen content (1-as-paragine as standard). The best mycelium production was found on d-xylose and glucose as C sources and KNO3 and 1-asparagine as N sources. Increase in dosage of both sources caused increase in yield but different changes in pH, according to how nutrients were utilised. |