Effect of biotic and abiotic factors on symbiotic nitrogen fixation

The structure and function of Rhizobiumlegume symbiosis are affected by biotic and abiotic factors such as root exudates，nod factors，soil moisture，mineral elements and so on, especially the biotic factors, which are the leading factor for building symbiosis. It has great significance for environmental protection and sustainable agricultural development to study the effect of Rhizobium legume nodulation ability of infection nod and nitrogen fixation efficiency. Present research analyzed the effect of biotic (host plants and Rhizobium) and abiotic factors (environmental factors) on Rhizobiumlegume symbiotic nitrogen fixation, and discussed the problems needed to be further studied as well as the prospects.