SILVA, V. M. B.; http://lattes.cnpq.br/4288805463566186; SILVA, Vitor Manoel Bezerra da.
Resumo:
The extraction of vegetation charcoal, even if certified, and the extraction of vermiculite
mineral, cause negative environmental impacts on the environment due to the
accumulation of waste generated by industries. One of the alternatives to mitigate
these impacts is the agricultural use of these residues in the formulation of
environmentally sustainable fertilizers, especially in corn crops, which have high
nutritional requirements throughout the cycle. Thus, the objective of the research was
to establish the efficiency of organomineral fertilizer, formulated with residues from the
extraction of charcoal, vermiculite and cattle dung, in the nutrition and growth of corn
crops. For this, an experiment was carried out in a greenhouse, in a completely
randomized design, with eight treatments and four replications, totaling 32
experimental units. The treatments corresponded to seven doses of the proposed
fertilizer (0; 1.25; 2.50; 3.75; 5.00; 6.25 and 7.50 t ha-1.) and a control treatment based
on the recommendation of fertilizer for corn. The organomineral fertilizer was
composed of 40% charcoal, 40% vermiculite residue and 20% cattle manure. The
green corn cultivar used was AG 1051, which remained for 70 days in pots containing
7 L of soil. The increase in doses of fertilizer made from vermiculite residue, charcoal
and cattle manure promoted an increase in corn growth 70 days after sowing. The
dose of up to 5.25 t/ha of the elaborated fertilizer promoted greater accumulation of
phytomass in corn plants 70 days after sowing. The fertilizer showed promise when it
comes to the accumulation of nitrogen and phosphorus in plant tissues, with this
behavior being the opposite when it comes to the accumulation of potassium. There
was an increase in pH and potassium content in the soil as the dose of fertilizer
produced was increased.