Effects of Shade/Non-shade Farming Systems on Cup Quality of Arabica Coffee in Yunnan
Yunnan is the only Arabica coffee producing province in China and the northernmost coffee planting area in the world (from latitude 22° N to 25.5° N). In this research, 52 coffee samples were collected from three major Arabica plantation regions, namely Siamo, Dehong and Baoshan and rated by a professional cup taster group in Berlin (Germany). The coffee beans from shade and non-shade farming systems at different altitude are compared in the research. The advantage of the shading system is clearly seen. The coffee beans under the shading situation have better quality in all four organoleptic items and 'Total dry weight of Parchment beans/Fresh coffee fruit weight (D/F)' item. Furthermore, a positive correlation between aroma and D/F item was found in the comparison of different Catimor family samples from similar altitudes (about 1 000 m.a.s.1.). The ratio of D/F could probably be defined as a reference standard for cup quality with simple, concrete and objective advantages. On the other hand, the introduction of shade farming system seems can significantly increase the D/F ratio. That could be one of the reasons to explain why coffee beans from farming system have better performance in the cup testing, especially for aroma item. Further research is needed in collecting more data series to confirm this finding.this finding.