or NO3 -N as the sole nitrogen source, N2 levels increased gradually to a relatively steady value 53.74%, 50.21% and 55.13% within 36 h. N2 did not increase in the controls.
or NO3-N as the sole nitrogensource, N2 levels increased gradually to a relatively steadyvalue 53.74%, 50.21% and 55.13% within 36 h. N2 did not increase inthe controls.