Substrate evaluation and arbuscular mycorrhizal fungi (AMF) application to Anthurium andreanum crop at the nursery stage
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Abstract
plant for its elegant leaves and beautiful flowers. It is a slowlygrowing
crop that completes its physiological cycle by going
through three stages or phases: adaptation, acclimatization
and nursery. Tissue culture is its most appropriate reproduction
form and its development is based on available slightly acid
substrates with a bulk density of about 0.60 kg.cm-3 and an
estimated organic matter content of 25 %. It also requires wellaerated
substrates. Besides, it is necessary to take into account
other influential aspects to obtain a good seedling, such as
mineral fertilization, use of growth promoters and, in the last
decades, addition of soil microorganisms as biofertilizers. Experimental
works were developed at the nursery stage in the
National Institute of Agricultural Sciences (INCA), over the
period of June/2004-January/2006, with the objectives of
localizing and characterizing adequate carriers to satisfy plant
needs; preparing, characterizing and defining the possible
influence of different substrate formulas on plants within this
stage; determining the influence of different substrate pH
values as well as evaluating the effects of AMF biofertilization
on seedling growth in tested substrates. Results showed
Anthurium answer to different substrates used, standing out
those mixing acid peat+filter cake+zeolite, so proving the
significance of substratum pH on crop development and
growth, 6,5 being the most appropriate one. In general, a
positive effect was recorded after applying mycorrhizal
biofertilizers to Anthurium growth, these treatments showing
a higher growth than those without it.
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