The simple associations of Festuca pratensis and some of the legume species (Medicago sativa, Trifolium pratense, Trifolium repens, Lotus corniculatus) fix biological nitrogen between 57-133 kg/ha, in the first year of vegetation, and between 175-242 kg/ha, in the second year of vegetation. The amount of fixed nitrogen for 1% participation of legume species in the floristic structure was 2.36 kg/ha/year, and the amount of fixed nitrogen that remained in the soil ranged between 54-102 kg/ha.

graminaceous; legume; fixed nitrogen; floristic structure

Presentation: oral