Coffee Science
URI permanente desta comunidadehttps://thoth.dti.ufv.br/handle/123456789/3355
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Resultados da Pesquisa
Item Sites and sampling tools in the soil fertility evaluation of coffee plants in production(Editora UFLA, 2019-07) Mantovani, José Ricardo; Lima, José Antônio; Garcia, Ciro Pozzi; Rezende, Tiago TeruelIn soil sampling, the collection site and the tool used may induce errors that can compromise the results of the chemical analysis and, consequently, the definition of corrective and fertilizer doses. The objective in this study was to evaluate soil sampling sites and tools in a coffee growing area. The experiment was carried out in a field in the municipality of Alfenas-MG, in a 35-year coffee field. A randomized block design was used in a 3 x 5 factorial scheme and 4 replications, totaling 60 experimental units. The treatments consisted of 3 sampling sites: in the fertilizer strip (located in the projection of the plant canopy); between rows; and in the total area, with 1/3 of the samples collected under the canopy and close to the plant stem, 1/3 in the canopy projection and 1/3 collected between rows; and 5 sampling tools: Dutch auger; screw auger; probe; hoe and drill. Soil samples were collected at a depth of 0 to 0.2 m, and each composite sample was obtained by assembling and mixing 20 single samples. At each sampling point, an area of 2m 2 was delimited, in which simple samples were collected in all the evaluated places and with all the tools used. The following parameters were determined in the soil samples: pH in CaCl 2 ; potential acidity (H+Al); organic matter; P, extracted by Mehlich; K+, Ca2+, Mg2+ and base saturation. In a coffee-growing area, the fertilizer strip (canopy projection) has topsoil with higher acidity and lower contents of organic matter and nutrients P, K+, Ca2+ and Mg2+ than between rows. The tools used for soil sampling do not influence the results of soil chemical analysis in the coffee-growing area.Item Effect of cover crops and bioactivators in coffee production and chemical properties of soil(Editora UFLA, 2018-10) Franco Junior, Kleso Silva; Terra, Ana Beatriz Carvalho; Teruel, Tiago Rezende; Mantovani, José Ricardo; Florentino, Ligiane AparecidaCoffee cultivation has great socio-economic relevance in Brazil for the employment and income generation and there is currently a constant search for sustainable management techniques. Among them, we can mention the use of cover crops and soil bioactivators. However, studies relating the use of these two techniques are still incipient. Based on this, the objective of this research was to evaluate the effect of the Penergetic® bioactivator associated with different cover crops on chemical properties of soil and coffee productivity. The experiment was carried out in a coffee field with Catuaí Vermelho cultivar IAC 144, in a randomized block design in a factorial scheme 4 (soil cover) x 2 (use or not of the Penergetic® bioactivator), consisting of control (without plant cover); oats (Avena strigosa) + forage turnip (Raphanus sativus ); oats (Avena strigosa) + forage turnip (Raphanus sativus ) + lupine (Lupinus albus) + rye (Secale cereale) + vetch (Vicia sativa); Brachiaria brizantha (Urochloa brizantha), associated or not with the use of the Penergetic® bioactivator. The experiment was conducted for 6 months and after that period, the chemical properties of soil, the nutrient contents of the coffee plants, the development of the branches and the coffee productivity were analyzed. Data were analyzed by the Scott Knott test at 5% probability. It was verified the interaction between cover crops and the use of the Penergetic® bioactivator, positively influencing soil chemical characteristics, coffee nutrition and productivity.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 Nitrogen fertilizers and occurrence of Leucoptera coffeella (Guérin-Mèneville & Perrottet) in transplanted coffee seedlings(Editora UFLA, 2018-07) Sabino, Paulo Henrique de Siqueira; Reis Júnior, Francisco Ailton dos; Carvalho, Geraldo Andrade; Mantovani, José RicardoThe coffee leaf-miner (CLM) Leucoptera coffeella (Lepidoptera: Lyonetiidae) is one of the main pests of coffee plants in Brazil. Its occurrence in the crop is directly related to the physiological state and growth characteristics of coffee plants, in turn related to plant nutrition. The present work, therefore, aimed to evaluate the effect of nitrogen sources on the occurrence of CLM in coffee seedlings. The fertilizers used were ammonium sulfate, urea, and organomineral. The number of leaves mined by CLM and the relative contents of chlorophyll and crude protein in the leaves were recorded. Ammonium sulfate and urea favored higher occurrence of leaves mined and organomineral fertilizer provided the lowest incidence of leaves mined by CLM. The three sources of nitrogen increased the chlorophyll content, but only ammonium sulfate caused an increased percentage of crude protein in the leaves of coffee seedlings. For the improvement of management strategies for L. coffeella it is fundamental to understand favorable conditions, nutritional management it is one of the pest control mechanisms, thus making it possible to control the insect and prevent the population of CLM from reaching an economic damage threshold.Item Levantamento da fertilidade do solo de lavouras cafeeiras em produção, no sul de Minas Gerais(Editora UFLA, 2013-07) Figueiredo, Vanessa Castro; Mantovani, José Ricardo; Leal, Renata Moreira; Miranda, José MessiasO Brasil é importante produtor e exportador de café, e o principal polo cafeeiro encontra-se na região sul de Minas Gerais. Apesar de bem estudado na cultura do café, resultados de pesquisa em fertilidade do solo vêm apontado alguns problemas, sobretudo em relação ao excesso de K + no solo. Objetivou-se, nesse trabalho, realizar levantamento para verificar as condições de fertilidade do solo em áreas ocupadas por cafeeiro em produção, baseado em dados atuais e localizados no sul de Minas Gerais. Para avaliação da fertilidade do solo das lavouras cafeeiras, foram obtidas 2.406 análises químicas de rotina, referentes à camada superficial (0 a 20cm), no Laboratório da Cooperativa Regional de Cafeicultores em Guaxupé, Ltda. (COOXUPÉ), nos anos de 2007 e 2008. Os atributos químicos utilizados para avaliação da fertilidade do solo das lavouras cafeeiras foram: acidez ativa (pH CaCl 2 ), P disponível extraído com resina, bases trocáveis (K + , Ca 2+ e Mg 2+ ), acidez trocável (Al 3+ ) e índice de saturação por bases (V%). Verificou-se que o P-disponível, o pH e a saturação por bases são os atributos de fertilidade da camada arável que se encontram em piores condições e que os teores de Ca 2+ , Mg 2+ e Al 3+ do solo, da camada superficial da maioria das áreas avaliadas, estão adequados para o cultivo de cafeeiro. A maioria das áreas avaliadas possui teores elevados de K + no solo, possivelmente em função do uso rotineiro de formulações comerciais com altos teores do nutrientes, sem levar em consideração os resultados de análise de solo.