Parcelamentos e doses de nitrogênio e potássio aplicados no cafeeiro Conilon, via fertirrigação
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Data
2013-05-27
Autores
Magiero, Marcelo
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Universidade Federal do Espírito Santo
Resumo
The state of Espírito Santo is the largest coffee Conilon producer and the second
major coffee producer of Brazil, with about 77% and 25% of national production
respectively, occupying 68% of all rural proprieties, reaching approximately 12,5
million bags, being 75% Coffea canephora and 25% C. arabica. Being of great
importance for state economy. Stand out familiar properties, mainly on the north of
Espírito Santo, where the varieties of irrigation systems are largely used in coffee
plantations. The purpose of this work was to evaluate different subdivisions of
fertilization and fertilizers doses on coffee Conilon plantation irrigated, by
fertirrigation. The work was conducted in a commercial coffee Conilon farm (C.
canephora), coordinates: lon. 40° 2’ 34’’; lat. 18° 40’ 27’’, located on São Mateus ,
ES, Brazil, height 80m and average annual rainfall 1080mm. The coffee was planted
in April 2010, irrigated by drip irrigation system, with spacing 3,0 X 0,8m. The
experiment was carried out in a completely randomized design, in subdivided plot
and four repetitions, between September 2011 and January 2013, where the parcels
corresponded the to the different divisions of the annual fertilization, being: three,
nine, fifteen and twenty-one times within period of July and April of each year. The
sub parcels corresponded to the different doses of Nitrogen and Potassium, being:
60%, 80%, 100%, 120%, 140% and 160% of recommended doses by the 5th
approach manual liming and fertilization for the State of Espírito Santo. Was
measured vegetative growth of orthotropic and plagiotropic branches every 90 days,
the counting of their internodes and quantified yield and productivity of 2012 harvest.
For the parcels (subdivisions), only the growth and internodes number of the
plagiotropic branch I, didn’t was significant, in 2012 harvest just granulometry didn’t
was significant to different divisions of the annual fertilization. The different fertilizers
doses only influenced the growth of plagiotropic branch III (CPIII), the other assessed
variables showed no significant variation. For interaction was significant the growth of
plagiotropic branch II and the number of grains on plagiotropic branch I, II and III,
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compared by Tukey’s test at 5% of probability. The data demonstrate that increase of
divisions of fertilizer, have positive effects on growth of Conilon coffee plant. For the
different doses of Nitrogen and Potassium, there was significant difference to growth
of plagiotropic branch III, however all others treatments showed no significant
variation. It is likely to be due the residual fertilization of last crop and the short period
of treatment evaluation, being necessary a larger time of evaluation, in order to have
more conclusive data.
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Palavras-chave
Coffea canephora , Vegetative growth , Crescimento vegetativo , Yield , Rendimento , Fertilization , Adubação , Irrigation , Irrigação
Citação
MAGIERO, Marcelo. Parcelamentos e doses de nitrogênio e potássio aplicados no cafeeiro Conilon, via fertirrigação. 2013. 40 f. Dissertação (Mestrado em Agricultura Tropical) - Programa de Pós-Graduação em Agricultura Tropical, Universidade Federal do Espírito Santo, São Mateus, 2013.