Nitrogen-fixingblue-greenalgae

species with significant nitrogen fixation in cyanobacteria. More than 160 species and variants of nitrogen fixation have been studied or measured. The vast majority of them belong to the species of candina. Such as Nostoc, Anabae-na, Tolypothrix, Cylindros permum, Anabaenopsis, Calothrix, etc. In addition, some species of chromobacteria and real algae have nitrogen fixation capabilities. Nitrogen-fixing cyanobacteria through the role of nitrogen-fixing enzymes in their cells, the atmosphere free state of molecular nitrogen reduced to plant-ready nitrogen
compound
, while in its growth and reproduction process continued to secrete
amino acids
,
polypeptides
and other nitrogen-containing compounds and active substances, coupled with nitrogen-fixing cyanobacteria after the death of a large amount of ammonia nitrogen, thereby greatly increasing soil fertility. Most nitrogen-fixing cyanobacteria are found in a special cell called heterocytospheric cells, which are considered to be the main nitrogen-fixing sites for cyanobacteria. The release of cyanobacteria with strong nitrogen fixation capacity in rice paddies can increase the nitrogen content in the soil and provide more nitrogen nutrients for rice. In addition to self-contained nitrogen fixation, many species of nitrogen-fixing cyanobacteria can form symboxes with many plants, making them nitrogen-fixing. Such as cyanobacteria and ferns Azolla symbox, so that manga red has a high nitrogen-fixing activity. Manjiang Red is a kind of good water field green manure in the south of our country. In fact, its nitrogen fixation is performed by symbiotic nitrogen-fixing cyanobacteria fishy algae.