Biblioteca do Café

URI permanente desta comunidadehttps://thoth.dti.ufv.br/handle/123456789/1

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Agora exibindo 1 - 3 de 3
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    Use of by-products generated in the processing of coffee berries: A review
    (Universidade Federal de Lavras, 2023-07-17) Foresti Junior, Marcelo Paiva; Siqueira, Juliano Curi de; Souza, Aline dos Reis; Matos, Mateus Pimentel de; Fia, Ronaldo
    Coffee production plays an essential role in the Brazilian economy, and a large production centre is located in Minas Gerais. In recent years, there has been an increase in coffee cultivation, consequently generating coffee wastewater (CW) and solid waste (skin, pulp, parchment, and dregs) during the processing stage. Thus, the present review study seeks to characterize these by-products from the coffee production chain and present their possible applications in agribusiness and other sectors towards a circular economy, mainly related to reuse as fertilizer or energy and biomaterial recovery. CW treatment is complex given the high concentrations of organic matter, phenols, and nutrients, especially potassium. Still, its use as a liquid fertilizer is highly recommended as it can increase crop yield. In this regard, CW should be applied to soil according to nutritional criteria, with potassium as the reference chemical element. The wastewater production and its potential for soil contamination can be reduced by applying biological, physical, or chemical treatment along with recirculation routes during the washing/peeling/pulping of coffee berries. Moreover, the solid waste from coffee production can be used for energy generation, wastewater treatment (as an organic filter material or biochar), and as organic fertilizer (in natura or composted).
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    Organomineral fertilizer in coffee plant (Coffea arabica L.): Fertilizer levels and application times
    (Universidade Federal de Lavras, 2023-09-01) Mota, Raquel Pinheiro da; Ferraz-Almeida, Risely; Camargo, Reginaldo de; Franco, Miguel Henrique Rosa; Delvaux, Julio Cesar; Lana, Regina Maria Quintão
    Coffee (Coffea arábica L.) is a fundamental agricultural commodity in the Brazilian economy, demanding a high amount of nutrients for good vegetative development and productivity. The tested hypothesis was that the use of the organomineral fertilizer promotes coffee production and development due to the greater availability of N, P, and K in the soil. The objective of this study was: (i) to monitor the use efficiency of the organomineral fertilizer rates; (ii) to determine the coffee production and development with the organomineral application. A study was developed with applications of four organomineral rates (75%, 100%, 125%, and 150% of the recommended P2O5 rate), three forms of parceling (one, two, and three applications of the organomineral fertilizer), and one control (100% mineral). Yield, soil, leaves, and plant development were monitored. Results showed that organomineral presented a win-win scenario with adequate disposal of residues and sources of nutrients in agriculture promoting the coffee yield from 49.5 (mineral fertilizers) to 53.5 sc ha-1 (100% of P2O5 in organomineral). The plant height, the diameter of the stem, and the canopy presented a quadratic response to organomineral rates with optimal rates fitted at 127; 140; and 140 %, respectively, but there was no direct effect on yield. The split organomineral applications promoted the contents of P and K in the soil, mainly when associated with higher organomineral rates. The K efficiency use was increased with organomineral application indicating the K was used with more efficiency.
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    Coffee plant diseases affected by nutritional balance
    (Universidade Federal de Lavras, 2023-05-02) Pozza, Edson Ampélio; Pozza, Adélia Aziz Alexandre
    In recent years, sustainability has become a priority in agricultural production programs throughout Brazilian territory due to the need to ensure food security and environmental quality. Diseases continue to be a factor limiting sustainable agricultural production, due to the great need for chemical defenses for their control. Thus, it is indispensable to make use of alternative management techniques to reduce the use of such chemical defenses and to increase resistance of plants to diseases. It is known that mineral nutrients affect plant resistance to diseases, and effective physical and biochemical response of plants to pathogens is determined by adequate concentrations of mineral elements in the plant tissues. This review presents the most recent information related to the mode of action of the nutrients in the host-pathogen interaction and individual action in the control of plant diseases with the use of essential nutrients, as well as other elements considered beneficial, such as Si. It also reports on the use of some of these mineral nutrients in control of the main diseases of the coffee plant that occur in Brazil, especially rust, cercosporiosis or brown eye spot, phoma leaf spot, and bacterial blight. In addition, contradictory and satisfactory results are found in the literature on the use of mineral nutrients in control of different diseases, including coffee diseases.