Effect of zinc and iron on growth, oil yield and quality of Japanese mint (Mentha arvensis L.) in sandy loam soil.

摘要

A field experiment was conducted during 1995/96 and 1996/97 at Lucknow, Uttar Pradesh, India to study the effects of different levels of Zn (0, 7.5, 15.0 and 22.5 kg ha-1) and Fe (0, 10.0, 20.0 and 30.0 kg ha-1) on Japanese mint (Mentha arvensis). Fresh herbage, essential oil yield and growth parameters (plant height and leaf area index) increased significantly over the control with application of Zn at 7.5 kg ha-1 and Fe at 10.0 kg ha-1. Further increases in their doses did not improve the herbage and oil yield. Essential oil concentration in green herbage and its quality of essential oil with respect to major chemical constituents of oil, namely menthol, menthone and menthyl acetate, did not change with application of Zn and Fe.