Abstract

AGUIRRE-MEDINA, Juan Francisco et al. Hongo endomicorrízico y bacteria fijadora de nitrógeno inoculadas a Coffea arabica en vivero. Agron. Mesoam [online]. 2011, vol.22, n.1, pp.71-80. ISSN 2215-3608.

Endomycorrhizic fungi and nitrogen-fixing bacteria inoculated in coffee nurseries. In order to study the effect of bio-fertilization of Coffea arabica L. with Azospirillum brasilense and Glomus intraradice a trial was established in a nursery at the experimental station Rosario Izapa, Chiapas, Mexico from September 2005 to April 2006. We used a Andosol-mollic soil typical of the Soconusco coffee region of Chiapas, Mexico. A. brasilense had a concentration of 100 x 106 bacteria per gram of peat and the mycorrhizal fungi of 40 spores per gram of soil with 95% infection of the root system of onion. The treatments were the microorganisms alone, the combination of both, and the control without microorganism, which were arranged in a randomized complete block design. Morphological and physiological yield components were evaluated every 30 days from the second month to seven months. The content of N, P and Ca in plant tissue was determined. The results were analyzed statistically and differences between treatments were compared according to Tukey 5%. The results indicate a differential response of microorganisms. A. brasilense induced greater root development and the double symbiosis G. intraradices + A. brasilense enhanced the development of stems and leaf blades. The content of N, P and Ca are presented in a manner consistent with G. intraradices.

Keywords : Inoculation; allocation of dry matter; nitrogen; phosphorous; calcium; coffee.

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