Biofertilization using rhizobacteria and AMF in the production of tomato (Lycopersicon esculentum Mill.) and onion (Allium cepa L.) seedlings. I. Vegetative growth
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Abstract
was performed on a compacted eutric Red Ferralitic soil by
means of seed coating and without mineral fertilization, on
some tomato and onion seedling growth indicators studied in
the experimental areas from the University of Ciego de Ávila,
during two successive horticultural seasons. Four species of
crop growth promoting rhizobacteria �??PGPR- (Azospirillum
brasilense, Azotobacter chroococcum, Burkholderia cepacia
and Pseudomonas fluorescens) and five species of arbuscular
mycorrhizal fungi �??AMF- (Glomus clarum, G. fasciculatum,
G. mosseae, G. agregatum and G. versiculiferum) were used.
Seedling height and root length were the points of evaluation
taken into account. As a result of the inoculation on tomato
using Azospirillum brasilense, Azotobacter chroococcum and
Burkholderia cepacia, seedlings showed a similar quality to
that achieved by means of mineral fertilization. The same result
was observed in onion, only through inoculating by
Azospirillum brasilense and Azotobacter chroococcum.
Regarding AMF inoculation, the species Glomus clarum,
G. fasciculatum and G. mosseae produced optimal seedling
height and root length. Through PGPR+AMF coinoculations,
seedling quality was superior to the one achieved using the
best single inoculation variants. In this sense, the most
effective combinations were G. clarum and G. fasciculatum
with A. brasilense for tomato, as well as G. clarum and G.
fasciculatum with A. chroococcum for onion.
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