Resumo

OJEDA-QUINTANA, Lázaro J et al. The influence of application of Azospirillum lipoferum in Megathyrsus maximus vc. guinea tobiatá in Pardo Grisáceo soil. Pastos y Forrajes [online]. 2016, vol.39, n.1, pp. 27-32. ISSN 2078-8452.

A study was conducted during two years at the Soils and Fertilizers Research Station Escambray (located in the Cienfuegos province, Cuba), in order to evaluate the effect of the application of different doses of Azospirillumlipoferum in Megathyrsusmaximus cv. guinea tobiatá. For such purpose a randomized block design was used, with seven treatments and three replications. The treatments were: doses of application of the biofertilizer (L ha^-1): 25, 50, 75, 100 and 125; a control with NPK at planting (45 kg ha^-1 of nitrogen in alternate cuttings); and an absolute control. The plots measured 16 m², with an evaluable area of 9 m². The A. lipoferum strain used was INICA-8, with an average concentration of 10⁸cfu g^-1 of seed. Four cuttings per year were made, with a frequency of 90 days, at a height above the soil of 25 cm, and in each cutting the dry matter yield was evaluated. The application of A. lipoferum had a favorable influence on the pasture establishment; the accumulated yield was 27,91; 28.34; 30,17; 30,23 and 31,92 t DM ha^-1 for 25, 50, 75, l00 and 125 L ha^-1, respectively, with significant difference from the control. The highest DM yield was found in the fertilized control (54,45 t DM ha^-1), which differed significantly from the other treatments. It is concluded that this biopreparation can be an alternative to mineral fertilization.

Palavras-chave : organic fertilizers; nitrogen fixing bacteria; yield.

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