Effect of stage of maturity at harvest on the quality of different accessions of turmeric (Curcuma domestica Val) in Southwestern Ethiopia
2016
Girma Hailemichael | Amsalu Nebiyu
An experiment was conducted to investigate the effect of harvesting stages on quality of turmeric. Three accessions of turmeric with five harvesting stages were evaluated in a factorial combination. Samples (1 kg each) were harvested, dried and quality parameters were recorded. The analysis indicated that moisture content was significantly (p < 0.01) influenced by accessions and harvesting stages. The lowest moisture content (74.3%) was attained from Pack.6/82 harvested 8 months and the highest moisture content (78.81%) was attained from Bonga.51/71 harvested 11 months after planting. The highest essential oil content in fresh (1.21%) and in dried rhizomes (5.13%) was recorded from Bonga.51/71 harvested 7 months after planting. On the other hand, oleoresin content was significantly influenced (p < 0.05) by cultivar. The highest oleoresin content in fresh (2.77%) and in dried rhizomes (11.45%) was obtained in Bonga.51/71. The results of the present study showed that accession Bonga.51/71 and cultivar Dame (Ind.48/72) were superior with respect to major quality parameters indicating the potential for export provided that recommended harvesting and processing methods applied. The accessions showed higher quality performances when harvested from 7 to 8 months after planting and is recommendable for producers for extraction and export.
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