Reattività alla concimazione azotata di un ecotipo diLolium Rigidumisolato dalla flora spontanea della Sardegna

In the biennium 1974-76 a fertilization trial was carried out on Sardinian calcareous sons, by utilizing incresing (from o to 450 Kg/ha) N doses, so as to test the productive capacity of a self-seeding annual ryegrass isolated from the spontaneous flora of Sardinia. The results achieved in the biennium show the involved lolium to highly react to N supplies. The highest yields are achieved with the highest N doses, with production peaks over 600 q/ha of grass and 100 q/ha of dry matter. Still from an economie point of view, on the base of the results attained in the biennium, N dose from 150 to 200 Kg/ha seem to be the most economical.