Utilização de água residuária do processo pós-colheita do café na produção de mudas de cafeeiro

• Main Author: e Melo, Augusto Cezar de Paula [UNESP]
• Publication Date: 2011
• Other Authors: Sousa, Antonio de Pádua [UNESP], de Carvalho, José Joaquim [UNESP], Salomão, Leandro Caixeta [UNESP]
• Format: Article
• Language: eng; por
• Source: Repositório Institucional da UNESP
• Download full: http://irriga.fca.unesp.br/index.php/irriga/article/view/312; http://hdl.handle.net/11449/72940
• topic: Coffea arabica L; Coffee; Water reuse; crop production; organic compound; potassium chloride; wastewater; water table; Coffea arabica

Intending to achieve better results on coffee production, the coffee producers began, since the 80s, to process the coffee postharvest, in order to ensure product's superior quality. However, with the processing, other problem appeared, the contamination of rivers, creeks, soil and water table from coffee wastewater (ARC). This paper had as main objective to use the ARC on the coffee plants' production verifying its viability and if the ARC is able to supply the coffee potassium requirements when they don't receive potassium chloride in the organic compound. The work was developed at Faculdade de Ciências Agronômicas - UNESP, Botucatu-SP, in a greenhouse located at Departamento de Engenharia Rural. The work consisted of 10 treatments on a 5×2 factorial (5 wastewater proportions of coffee after the harvest processing - 0%, 25%, 50%, 75% and 100% - and potassium chloride presence or absence in the composition), with 4 repetitions with a completely randomized statistical design. The ARC was applied each 48 hours in an irrigation depth of 10 mm. After 6 months, the plants' vegetative characteristic had been evaluated as well the chemical characteristics of the compound and of the plants. We observed that the treatments with potassium chloride presence showed worse vegetative characteristics compared with treatments which did not have KCl in its composition. Moreover, with the increase of the wastewater dosage, it happened a decrease in the vegetative characteristics, however an addition in the chemical characteristics of the compound. Also, the treatments without KCl presence and with 0% and 25% of coffee wastewater had been statistically equal, showing the viability in the use of the ARC in the production of coffee plants, since the compound does not contain KCl and that the water used in the composition is a mixture of 25% of ARC with 75% of common water.