Leaf, Essential Oil and Artemisinin Yield of Artemisia (Artemisia annua L.) As Influenced by Harvesting Age and Plant Population Density (original) (raw)

2011, World Journal of Agricultural Sciences

An experiment was conducted to determine the effects of harvesting age and plant population density on agronomic and chemical characters of Artemisia (Artemisia annua L.) during 2009. Four levels of harvesting age and five levels of population density were arranged in split plot design with three replications. Harvesting age was assigned to main plots and plant population density to sub plots. The effects of harvesting age and plant population density were assessed by analyzing data on growth, yield and yield components of A. annua. Interaction effects of harvesting age and plant population density was highly significant (p < 0.01) on plant height, leaf area index, dry leaf yield haG and significant (p < 0.05) on artemisinin yield. Dry leaf yield plantG 1 1 and artemisinin content were affected significantly (p < 0.05) by harvesting age and plant population density. Branch numbers/plant, essential oil (EO) content and EO yield were affected significantly (p < 0.05) by plant population density. In this study, the maximum dry leaf yield (3.15 t/ha), EO yield (19.2 kg/ha) and artemisinin yield (10.9 kg/ha) were attained at plant population density of 27, 777 plants haG and harvested at 5 months 1 after transplanting (MAT), 4 t0 7 MAT and 7 MAT for dry leaf yield, EO yield and artemisinin yield, respectively.

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