Coffee Science
URI permanente desta comunidadehttps://thoth.dti.ufv.br/handle/123456789/3355
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Item Interaction of K and B in the intensity of coffee rust in nutrient solution(Editora UFLA, 2018-04) Vasco, Gabriel Brandão; Pozza, Edson Ampélio; Silva, Marília Goulart da; Pozza, Adélia Aziz Alexandre; Chaves, EugênioThis study aimed at assessing the interaction of potassium (K) and boron (B) in the coffee rust intensity in a nutrient solution. The experiment which was performed in a greenhouse was set up in the randomized complete block design (DBC) with four replicates. The experimental unit involved a single vase with two Catuaí Vermelho (IAC 144) cultivars. The treatments included five doses of boron (0.05, 0.50, 1, 2 and 4 mg L-1 ) and five of potassium (4.0, 5.0, 6.0, 7.0 and 8.0 mmol L-1 ), totaling to 25 treatments in a factorial variance analysis. All the coffee seedling leaves were inoculated with Hemileia vastatrix. For the next 24 hours, the vases were covered with a black plastic bag, and left in the greenhouse to ensure favorable conditions for the fungal infection. A significant interaction was observed between the potassium (K) and boron (B) nutrients in coffee rust intensity. As the boron dose increased from 0.05 to 2.0 mg L-1 , the coffee rust intensity was observed to rise. From the 0.50 mg L-1 dose of B a drastic drop in the dry plant mass was observed, which reached zero index at the highest boron dose due to phytotoxicity.Item Early growth of coffee plants and soil fertility properties in response to coffee husk application(Editora UFLA, 2018-07) Mantovani, José Ricardo; Paula, Deyvid Wilker de; Rezende, Tiago Teruel; Silva, Adriano Bortolotti da; Andrade, Paula Cristina Castro; Landgraf, Paulo Roberto CôrreaCoffee processing generates large amounts of husk, which can be used as organic fertilizer if technical criteria are considered. This study investigated the effect of coffee husk, applied to or incorporated into the soil, on soil fertility properties, early crop growth and nutrient accumulation in coffee plants. The experiment analyzed coffee plants in a greenhouse in pots, in randomized blocks, in a 5x2 factorial arrangement plus a control treatment, with four replicates. The treatments consisted of the combination of five coffee husk rates (3.5; 7; 14; 28, and 56 t ha-1 ), applied in two forms: spread on the surface or incorporated into the soil, plus the control treatment, without husk application. Portions of 7 dm 3 soil were blended with lime, phosphate fertilizer, as well as coffee husk rates in the treatments with residue incorporation, and incubated for 30 days. Thereafter, one coffee seedling per plot was planted, the coffee husk rates were applied on the soil surface for the treatments without residue incorporation, and the plants were left to grow for 180 days. Coffee husk applied to or incorporated into the soil surface increases the K and organic matter contents of the soil, intensifies the early growth of coffee plants and accelerates N and K accumulation in the plant shoots. The application of coffee husk on the surface is more indicated than its incorporation into the soil, and the best rate at coffee planting is equivalent to 20 t ha-1 .Item Development and production of fertigated coffee vicente, trees in the west region of Bahia, Brazil(Editora UFLA, 2018-01) Vicente, Marcelo Rossi; Mantovani, Everardo Chartuni; Fernandes, André Luís Teixeira; Neves, Julio Cesar Lima; Dias, Santos Henrique Brant; Figueredo, Edmilson MarquesThe aim in the present study was to evaluate the effects of different split fertigation and doses on the development and production of drip irrigated coffee in the western region of the state of Bahia, Brazil. The study was performed at the Café do Rio Branco Farm, in Barreiras, BA, Brazil, in adult coffee trees aged approximately 3.5 years from the variety Catuaí IAC 144. A 3 x 3 factorial design was adopted, with three levels of nitrogen and potassium fertilization (900/800, 600/500 and 300/250 kg ha-1 year-1 N and K2O) in three monthly split fertigation (two, four and eight times). Stem and crown growth, productivity, yield and sieve were evaluated. The doses of 600/500 and 900/800 kg ha-1 year-1 N/K2O and the splits in two and eight times provided the highest productivities of coffee. A higher split fertigation was observed on the effect of N and K2O doses in coffee development variables (crown diameter and plant height). There was no effect of split fertigation and doses in the classification by sieves of coffee beans.Item Ácido naftalenoacético associado à adubação potássica na brotação de café Conilon(Editora UFLA, 2017-04) Baroni, Danilo Força; Reis, Luciléa Silva dos; Baitelle, Diego Corona; Vieira, Kezia Moraes; Meireles, Robson Celestino; Haddade, Ismail Ramalho; Verdin Filho, Abraão CarlosOs gastos com mão de obra podem representar mais de 50% do custo total de produção do café Conilon, sendo a poda e a desbrota responsáveis por maior parte desses custos, ficando atrás somente dos gastos com colheita. Alguns fitorreguladores de crescimento do grupo das auxinas associados ao potássio (K2O) podem reduzir a emissão de brotos. Objetivaram-se com o trabalho verificar o efeito do ácido naftalenoacético (ANA) associado à adubação potássica na brotação de café Conilon. O experimento foi realizado de junho de 2014 a dezembro de 2015, em lavoura adulta de café Conilon não irrigada, da cultivar “G35-Verdebrás”, localizada no Instituto Federal do Espírito Santo – Campus Santa Teresa. Utilizaram-se o delineamento em blocos casualizados, com o arranjo fatorial 5x4 entre níveis de ANA e níveis de K2O, respectivamente. Foram empregadas cinco doses de ANA (0, 50, 100, 250 e 500 mg L -1), e quatro de K2O na adubação, (60, 120, 240 e 480 kg ha -1). Observou-se que a aplicação de ANA influencia a emissão de brotos por favorecer a dominância apical das plantas. Os níveis aplicados de K2O interferem na ação do ANA, sendo que a aplicação de dosagens elevadas do nutriente pode inibir a ação deste fitorregulador. A aplicação de 344 mg L -1 de ANA associada à adubação de 120 Kg ha -1 de K2O reduziu o número de brotos por planta sem interferir na produtividade e desenvolvimento das brotações remanescentes.