To evaluate the inoculant "Graminante", six field experiments were carried out at FUNDACEP FECOTRIGO, in Cruz Alta, RS. In the 1996 cropping season, two experiments were carried out with wheat crop and in the 1997 cropping season two experiments were carried out on wheat and two on oat crop. The commercial product was tested isolated and in association with nitrogen fertilization. In the 1996 cropping season the treatments were as follows: 1) Check without inoculation and without nitrogen fertilizer (N); 2) "Graminante" inoculant; 3) Nitrogen fertilizer applied at the planting date and broadcasting; 4) "Graminante" inoculant + N fertilizer at planting date and broadcasting; 5) "Graminante" inoculant at planting date + N fertilizer broadcasting; 6) "Graminante" inoculant + N at planting date and fertilizer broadcasting. In the 1997 cropping season another two treatments were added: 7) N at planting date and 8) N fertilizer broadcasting. In the 1996 season, both the gross and the net yield weights were evaluate on the wheat crop. In the 1997 season, and for the same crop, the parameters evaluated were: number of plants, of tillerings and of spikes, plant height, the total nitrogen content of the grain and grain yield. On the oat crop the parameters evaluated were: number os plants and tillerings, green matter weight, dry matter weight, total nitrogen content in the grain and grain yield, both with and without cutting. The inoculant "Graminante" did not show any favourable agronomical answer to any of the parameters analized for both the wheat and the oat crops.
nitrogen biological fixation; inoculation; Azospirillum; wheat; oat
