The Australian red cedar (
Toona ciliata M. Roem var.
Australis
) is a species that has shown potential
for forest use in Brazil. Thus, the objective of this study was to test the Australian red cedar seedlings
response to inoculation with arbuscular mycorrhizal fungi (AMF) in different doses of P. The experiment
was conducted in a Completely Randomized Design (CRD) in factorial 8 x 2, with five repetitions. The
treatments consisted in inoculation of seven species of AMF:
Rhizophagus clarus
,
Claroideoglomus etunicatum
,
Racocetra gregaria
,
Acaulospora colombiana
,
Acaulospora morrowiae
,
Gigaspora margarita
and
Dentiscutata heterogama
,
besides a treatment without inoculation; being subjected to two doses of
phosphate 25 and 250 mg dm
-3 and that levels were equivalent to 10.7 and 41.3 mg dm
-3, respectively.
It was evaluated the percentage of colonization, sporulation, height, diameter, shoot dry matter and
accumulation of nutrients, 150 days after transplanting. There were differences depending on the levels
of P and isolated variables evaluated. At the lowest dose, the isolated
Claroideoglomus etunicatum and
Acaulospora colombiana benefit the growth and nutrient absorption, while at the highest dose,
Acaulospora
morrowiae showed to be more promising for the growth of plants. These isolates provided high mycorrhizal
colonization in the red cedar, favoring the production of quality seedlings, aiming the establishment and
productivity of commercial plantations.
