Pregledni rad

SYMBIOTIC NITROGEN FIXATION IN ORGANIC FARMING

Jurka Topol ; Superna d.o.o., Čakovec, Hrvatska
Gabriella Kanižai Šarić orcid.org/0000-0001-5184-608X ; Poljoprivredni fakultet Osijek, Osijek, Hrvatska

Sažetak

In agricultural production nitrogen is the main limiting factor for growth and development of plants and thereby also achieving optimum yield. The largest stock of this element is in the atmosphere, where nitrogen is in a molecular form which plants are not able to uptake and use. The proceesses of nitrogen fixation are defined as processes in which unavailable nitrogen from the atmosphere is transformed into new compounds, and thereby becomes available to microorganisms and plants to use them for their own metabolic needs. Symbiotic nitrogen fixation which is of the greatest importance for agricultural production occurs as a result of symbiotic interactions between the plants from the family Leguminosae and root nodule bacteria. Symbiotic interaction begins by mutual recognition of appropriate rhizobia and legumes, followed by infection and nodulation. In the nodule, with the presence of nitrogenase enzyme, the process of nitrogen fixation occures in which atmospheric nitrogen is transformed to ammonia which plant can include in its metabolism and use it for their various needs. In organic farming, which is
designed to preserve the nature and environment, one of the basic principles is cultivation of legume crops. In this way agricultural soil is enriched with nitrogen, stimuling increase and maintainance of soil fertility which has multiple positive economic and environmental effects.

Ključne riječi

nitrogen; symbiotic nitrogen fixation; nodule bacteria; legumes; organic farming

Hrčak ID:

112685

URI

https://hrcak.srce.hr/112685

Datum izdavanja:

25.11.2013.

Podaci na drugim jezicima: hrvatski

Posjeta: 5.183 *