ESSENTIAL OIL AND COMPOSITION OF ANISE (PIMPINELLA ANISUM L.) WITH VARYING SEED RATES AND ROW SPACING

摘要

Two year study was carried out to explore the effect of seed rate and row spacing on the fruit yield, essential oil yieldand composition of aniseed. The study factors included seed rate (6 g, 12 g, 24 g/10 m2) and row spacing (15 cm, 25 cm,37.5 cm. A significantly higher fruit yield was produced at narrow row spacing of 15 cm among treatments. Wider rowspacing produced markedly higher essential oil than narrow row spacing. Essential oil accumulation decreased as plantingdensities increased. The major constituent of anise oil was trans-anethole (82.1%) followed by γ-himachalene (7.0%). Thequality parameters including estragol, γ-himachalene and trans-anethole were significantly affected by different rowspacing. Plant grown at 37.5 cm row spacing accumulated the highest estragol and trans-anethole concentration among therow spacing treatments. It can be concluded that higher plant density and wider row spacing increased the disease infestationand lodging cultivar Enza Zaden in current study exhibited high concentration trans-anethole in essential oil compositiontherefore is a good quality chemotype.