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The study was aimed to decrease the application of mineral fertilizers in the production of triticale-based forage, with the combined use of EcoMic® (arbuscular mycorrhizal fungi) and Fitomas-E®. It was developed on a red Ferralitic leachate soil in the Station of Pastures and Forage Genetics Cattle Company (EPG) "Niña Bonita", Artemisa province. The treatments were: 1. Absolute Control; 2. Application of mineral fertilizers 150, 92 and 120 kg ha-1 of N, P2O5 and K2O; 3. Application of mineral fertilizers 100, 54 and 70 kg ha-1 of N, P2O5 and K2O + EcoMic® (15 kg ha-1) + Fitomas-E® 2 L ha-1. Mycorrhizal variables, the percentage of N, P and K in the leaf tissue and crude protein percentage in forage were analyzed. The dry mass (forage) in kg ha-1. The results showed that a decreased amount of mineral fertilizers did not reduce the quality of the fodder produced, since no significant differences among control treatments production and use of biofertilizer were recorded. Moreover higher percentage intensity and mycorrhizal colonization and the highest number of spores per g-1 soil was recorded. The results showed the establishment of a mycorrhizal association among guest and host. It was recorded savings in production costs with the implementation of these, so it became more profitable to produce forage. [ABSTRACT FROM AUTHOR]

An experimental work was carried out at "Niña Bonita" Pasture and Forage Station of Bauta, in order to achieve high forage production based on triticale by using minimum nitrogen doses. It was made on a Lixic Ferralic Nitisol with arbuscular mycorrhizal fungal inoculations (AMF). Treatments consisted of AMF inoculation and non-inoculation as well as varying N doses (0, 50, 100, 150, 200, 250 and 300 kg ha-1), with a fixed bottom of 54 and 70 kg ha-1 of phosphorus and potassium, respectively. Evaluations were performed to leaf rates (% N, % P and % K), fungal variables, N, P and K extraction (kg ha-1), raw protein (%), mycorrhizal efficiency (%), dry forage mass (kg ha-1), apparent recovery efficiency (kg kg-1) and partial factor productivity, besides using ANOVA statistical analyses with one-way classification model to the original data. In every case, the best fitting models (dose-yield) were chosen to estimate optimal N doses with and without AMF, followed by the first derivative criteria to find the respective optimum ones. Results showed that AMF application allows reducing N doses to 50 and 100 kg ha-1, achieving a dry mass production of 6185 kg ha-1 with 11,75% raw protein; leaf rates of 1,94% N, 0,23% P and 30% K, indicating the adequate forage quality produced. [ABSTRACT FROM AUTHOR]