SILVA, Fábio Júnior Vieira da.
Resumo:
The use of bacteria growth promoters of plants (BPCP) associated with
application of doses of phosphorus, has provided high rates of production, Brazil,
for the culture of corn (Zea Mays). However for achieve adequate productivity, it
is usually necessary know the best dose of phosphorus, which is a of the factors
what else contribute with the costs of production. In the present work, the
objective was to evaluate the influence of sources of P associated or not to
bacteria growth promoters of plants (BPCP) about nutrition in early growth and
phytomass production. Work was driven at home vegetation from the Federal
University of Campina Grande (UFCG), Campus Pombal-PB. Was used horizon
sample B on one chromic luvisol, collected in the municipality São Domingos-PB.
Were tested six treatments (T), beyond control (C), constituted by constituted by
single superphosphate (SFS), reactive natural phosphate (FN) e BPCP specified
like this: T1: control (without P), T2: 200 mgdm-3 P as SFS, T3: 200 mg dm-3 P
as SFS + BPCP, T4: 200 mg dm-3 P como FN, T5: 200 mg dm-3 P como
FN+BPCP, T6: 100 mg dm-3P as SFS it is T7: 100 mg dm-3P as SFS+BPCP.
Was used the delineation entirely randomized with four repetitions, and two plants
per plot. As parameters for evaluation the effectiveness of treatments at 45 days
after emergence, were evaluated to plant height, stem diameter, dry mass of
roots, stems, leaves and total, as well as the levels of P in these tissues, in
addition to the phosphorus available from the extractor Mehilic-1 and P-soluble.
The treatments with simple superphosphate (SFS), associated or not with
(BPCP), raised the levels of P in the dry mass of corn and promoted an increase
increase in production of dry mass and accumulation of P.
