Full Length Research Paper
Abstract
An experiment was carried out using a randomized complete block design with 4 replications to study the effect of water deficit stress on essential oil of balm. The factors studied included 5 levels of water deficit stress that were T1 (100% field capacity), T2 (80% field capacity), T3 (60% field capacity), T4 (40% field capacity) and T5 (20% field capacity) respectively. The results showed that water deficit stress significantly affected biological yield, essential oil yield, essential oil %, leaf yield, height of plant, tiller number, stem diameter, stem yield and internode length in P < 0.01. Highest biological yield and height of plant were achieved under T1, highest essential oil yield was achieved under T3 and highest stem diameter and essential oil % were achieved under T5. The results of this experiment showed that essential oil yield was reduced under water deficit stress but essential oil % increased under this condition.
Key words: Water deficit stress, essential oil, balm.
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