Resumo

NODA, Yolai; MARTIN, G; MATOS, W  e  PENTON, Gertrudis. Effect of chemical and biological fertilization on the morphoagronomic yield of Morus alba. Pastos y Forrajes [online]. 2013, vol.36, n.2, pp. 190-196. ISSN 0864-0394.

The effect of nitrogen fertilization, the vesicular arbuscular mycorrhiza (VAM) Glomus fasciculatum and the brassinosteroid phytohormone Biocep-6, on the morphoagronomic characteristics of Morus alba var. Ecomic®Acorazonada, was evaluated. For such purpose three fertilization rate (0, 150 and 300 kg/N/ha/year), two with and without- Ecomic® and two with and without- Biocep-6 were used, which originated a total of 12 treatments. Five plants were randomly selected and the variables height, number of primary branches and dry matter yield of: total biomass (DMYTB), edible biomass (DMYEB), leaves (DMYL) and fresh stems (DMYFS), were studied in them. A direct relation was observed between height and yield, as well as the effect of Biocep-6 on the number of primary branches. The DMYTB was 18,25; 17,24; 17,56; 18,43; 17,04; 17,22 and 18,31 t DM/ha/year in T4, T5, T6, T8, T9, T11 and T12, respectively. The DMYEB, DMYL and DMYFS behaved differently, according to each treatment. The synergy between biological and chemical fertilizers was concluded to be remarkable for all the morphoagronomic variables. The treatments Ecomic® + Biocep-6 and 150 kg N/ha/year + Ecomic® + Biocep-6 were significantly higher for all the variables. The total and edible dry matter yields obtained with the biological and mineral fertilization were within the range reported by other authors. The combined use of Ecomic® + Biocep-6 in order to obtain good agricultural yields in M. alba, as well as continuing the studies of bromatological composition to determine the effect of the combinations of chemical and biological fertilizers, is recommended.

Palavras-chave : mycorrhiza; Morus alba; plant growth substances.

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