Resumo

ALVARADO-RUFFO, Karen et al. Influence of the organic matter system and Azotobacter chroococcum over seedlings of coconut. cultrop [online]. 2019, vol.40, n.1 ISSN 1819-4087.

In Baracoa, municipality of the Guantánamo province the coconut seedling nurseries are being affected by the index low of germination and the little vigor of the seedling. The worm casting and the bacteria of the genus Azotobacter has been of those more employees in the seedling production, since promote the vegetable growth. The investigation over Randomized Block Design the combination of three levels of the substrates S:HL:FC (10:1:1), (4:1:1), (2:1:1) was studied with the inoculation of three strain of A. chroococcum (INIFAT-8, CDM-1, CDM-2) on the obtaining of seedling coconut belonging to the domesticated ecotipo "Indio Verde-1" in two soil, Haplic Arenosol (ARh) and Haplic Fluvic Gleysol (GFLh). As development indicators they were evaluated the index of speed germination of the seeds, the plant height (cm), the diameter in the stem base (cm) and the population of Azotobacter (UFC g-1 of soil). The possibility to diminish the organic mature levels employed in 50 % by means of the inoculation of strain of A. chroococcum isolated of the soil in study was demostrated. The combination soil: worm casting: fiber of Coconut (S:HL:FC) (4:1:1) with A. chroococcum CDM-1 in the soil ARh and A. chroococcum CDM-2 in the soil GFLh favored the increment of the studied variables, those that reached superior levels to which obtain higher levels to the recommended dose of mineral fertilization and to the organic mature.

Palavras-chave : Cocos nucifera; nursery; rhizobacteria; soil.

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