Author: PhredPhred Date: Jun 1, 2008 06:57
In article , shakiro wrote:>Sometime ago (Dec 7, 2007) there was a discussion in this group about
>manure, and as a sideline the topic of nitrogen fixating bacteriae came
>up. It was said that it would be unprobable that the nitrogen would be
>fixed in the compost, because "Main N-fixers are cyanobacteria and
>legumes. Both rely on sunlight."
>
>Now I've been reading a little bit about it, and the name of two nitrogen
>fixating bacteriae came up, who can be mixed either with the seeds at the
>time of germination, incorporated in the soil directly, or mixed through
>the compost in the last stage of maturing.
>The names of those bacteriae are Rhizobium and Azotobacter. They don't
>really seem to be needing direct sunlight.
Bacteria in the genus _Rhizobium_ are the typical "root nodulating
bacteria" which form a symbiotic association with the roots of many
species of legumes where they are responsible for fixing atmospheric
nitrogen -- hence the "nitrogen fixing ability" of legumes.
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