Alterations in the quality of coffee beans collected on cloth and on the ground, originating from organic, conversion and conventional management systems
The production and harvesting systems of coffee (Coffea arabica) were evaluated in Santo Antonio do Amparo, Minas Gerais, Brazil, with the objective of determining its influence on grain quality. Organic, conversion and conventional systems were evaluated. In July 1999, five-year-old Acaia (IAC 474-19) plants were grown on Red Latosol soil at a spacing of 2 x 1 m. The influence of the production and harvesting systems was significant in all measured variables. Sweeping harvested fruits resulted in poor-quality fruits with high total phenolic contents and titrable acidity. The system in conversion produced fruits with poor quality even when harvesting was conducted on cloth. The conventional and organic systems showed better performance. However, theconventional system yielded fruits with higher caffeine level; reducing, nonreducing, and total sugar contents; and greater polyphenol oxidase [catechol oxidase] activity compared with the organic system.
| Main Authors: | , , , |
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| Format: | biblioteca |
| Published: |
2002
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| Subjects: | COFFEA ARABICA, CAFEINA, CATECOL OXIDASA, COMPOSICION QUIMICA, CAFE, CALIDAD, ACTIVIDAD ENZIMATICA, ENZIMAS, FRUTAS, COSECHA, AZUCARES NO REDUCTORES, COMPUESTOS FENOLICOS, TECNOLOGIA POSTCOSECHA, AZUCARES REDUCTORES, CONTENIDO DE CARBOHIDRATOS, MINAS GERAIS, BRASIL, |
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| Summary: | The production and harvesting systems of coffee (Coffea arabica) were evaluated in Santo Antonio do Amparo, Minas Gerais, Brazil, with the objective of determining its influence on grain quality. Organic, conversion and conventional systems were evaluated. In July 1999, five-year-old Acaia (IAC 474-19) plants were grown on Red Latosol soil at a spacing of 2 x 1 m. The influence of the production and harvesting systems was significant in all measured variables. Sweeping harvested fruits resulted in poor-quality fruits with high total phenolic contents and titrable acidity. The system in conversion produced fruits with poor quality even when harvesting was conducted on cloth. The conventional and organic systems showed better performance. However, theconventional system yielded fruits with higher caffeine level; reducing, nonreducing, and total sugar contents; and greater polyphenol oxidase [catechol oxidase] activity compared with the organic system. |
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