Fertilizantes de liberação controlada no crescimento e desenvolvimento do mamoeiro 'THB'
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Data
2017-07-18
Autores
Simão, Letícia Abreu
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Editor
Universidade Federal do Espírito Santo
Resumo
Brazil is one of the main producers and exporters of papaya. The main Brazilian
states producing papaya are Bahia and Espírito Santo, which are responsible for
about 60% of the national production. The controlled release fertilizer use is rarely
used field in the state of Espírito Santo, especially for fruit trees. In the State, it has
been applied in the eucalyptus crop. The use of these types of fertilizers has as one
of the main advantages the reduction of labor for cover fertilizations. In these
fertilizers, the release of nutrients is dependent on the granule size, temperature and
humidity. The nutrients are made available by hydrolysis and by the action of
microorganisms. The objective of this study was to evaluate the efficiency of
controlled release fertilizers on growth and development of plants papaya 'THB' in the
vegetative and productive stage using fertilizers Basacote P-MAX 6M (Formula 17-
43-00)®
, Basacote NK-MAX 9M (Formula 17-43-00)®
and DuraTec Top 14 (Formula
14-07-14)®
. The experiment was carried out between June 2015 and November
2016, in the field, at the Santa Terezinha farm, Caliman Agrícola S. A., in Linhares,
Espírito Santo state. It adopted the random block design with six replicates and five
treatments. The treatments consisted of the application of doses of 25, 50, 75 and
100 g cova-1
of controlled release fertilizers Basacote P-MAX 6M®
in the planting and
ix
a control that was the drip fertigation. In the production phase, treatments consisted
of cover fertilization by applying two controlled release fertilizers, Basacote NK-MAX
9M®
and Duratec Top 14®
, at 3, 6, 9 and 12 months after planting. They were
evaluated at flowering stem diameter (SD), the first flower insertion height, plant
height (PH), leaf petiole length, number of leaves per plant and percentage of pit
defined for sex; in the production phase it was evaluated SD, PH, number of
marketable fruits, fruit mass, soluble solids and inner fruit firmness at 8, 13 and 17
months after planting; productivity was assessed by cumulative production, from 8 to
17 months. The new technology package is an alternative to fertigation, and
Basacote P-MAX 6M®
controlled release fertilizer can be applied to 25 g cova-1
at
planting, and cover fertilization with Basacote NK-MAX 9M®
and Duratec Top 14®
after 90 days of planting.
Descrição
Palavras-chave
Carica papaya L. , Morphoagronomic characteristics , Características morfoagronômicas , Intelligent fertilizers , Fertilizantes inteligentes
Citação
SIMAO, Letícia Abreu. Fertilizantes de liberação controlada no crescimento e desenvolvimento do mamoeiro 'THB'. 2017. 30 f. Dissertação (Mestrado em Agricultura Tropical) - Programa de Pós-Graduação em Agricultura Tropical, Universidade Federal do Espírito Santo, São Mateus, 2017.