Abstract

This study was conducted to evaluate the effect of management and shade levels on some biochemical components of coffee. The study was carried out at the Kenya Agricultural and Livestock Research Organization, Coffee Research Institute (KALRO-CRI) coffee farm in Bungoma County and two farmers’ fields in Bungoma County, representing high, medium and low management levels. The coffee management levels were categorized depending on field operations and application of inputs. The different shade levels were based on the distances from the shade tree trunk: 0-1.5, 1.5-3, 3-4.5, 4.5-6 m, respectively and coffee trees under full sun. The shading level was estimated by measuring the Photosynthetic Photon Flux Density in μmol m-2/s using a Line Quantum Sensor and expressing it as a percentage of that obtained under full sun. Fully ripe cherries were harvested, wet processed and the wet parchment dried to final moisture content of 10.5 to 11%. Caffeine, trigonelline, total chlorogenic acids, oil and sucrose were determined using specific methodologies and quantified on dry weight basis. The results showed that biochemical components were affected significantly due to shade and management levels. Most of the biochemical components were positively correlated with shade and management levels. This showed the possibility of manipulating the two parameters to enhance the quality of coffee.

Keywords:

Caffeine, chlorogenic acids, management level, sucrose, shade level, trigonelline,

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