Agricultura Tropical

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http://repositorio.ufes.br/handle/10/17346
Programa de Pós-Graduação em Agricultura Tropical

Centro: CEUNES
Telefone: (27) 3312 1701
URL do programa: http://agriculturatropical.ufes.br

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Navegando Agricultura Tropical por Assunto "Adubação"

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    Crescimento vegetativo e acúmulo de nutrientes em Coffea canephora na Amazônia Ocidental
    (Universidade Federal do Espírito Santo, 2015-02-24) Dubberstein, Danielly; Dias, Jairo Rafael Machado; Partelli, Fábio Luiz; Espíndula, Marcelo Curitiba
    The objective was to evaluate the vegetative growth of branches, the concentration and accumulation of nutrients in fruits and coffee leaves under different managements of fertilizer in South Western Amazon. The experiment was conducted in Rolim de Moura municipality, Rondônia, in crops propagated by cuttings 2.5 years old. The experimental design was randomized blocks in a split plot scheme in time, with three replications. The main plot consisted of two fertilization managements (absence and presence) and the plots of the evaluation time (measurement of branches and fruit collections and leaves). Branch growth differed depending on fertilization management, and in the period from early October to early December branches of plants that were fertilized expressed growth rates higher than branches of plants not fertilized. There were seasonal changes in growth throughout the year, the highest growth rates occur from mid-September to early April, characterized time of rainy season in the region. The mineral fertilization influences the concentration in the fruit on the sheet and accumulation in fruit for nitrogen, phosphorus, potassium, calcium, magnesium, manganese, iron and zinc. The concentration for most of the nutrients in the fruit are larger at the start of training. And proportionately lower from the development of the fruit, except for potassium that behaves differently, keeping high content of fruit in all stages of development. Since the leaves, low concentrations occur at the beginning of fruit formation and then tends to increase. Most of the accumulation of nutrients in fruits occurs in the expansion stages of grain formation and maturation, suggesting a higher nutritional demand during this period.
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    Parcelamentos e doses de nitrogênio e potássio aplicados no cafeeiro Conilon, via fertirrigação
    (Universidade Federal do Espírito Santo, 2013-05-27) Magiero, Marcelo; Partelli, Fábio Luiz; Bonomo, Robson; Gontijo, Ivoney; Reis, Edvado Fialho dos; Oliveira, Luiz Fernando Coutinho de
    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, vii 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.