前言留兰香是天然香料的重要品种之一,从其茎叶所提取的精油用作牙膏、口香糖及糖果用香精的原料。我国种植留兰香始于一九五○年。二十多年来,在毛主席革命路线的指引下,生产得到迅速发展,不但满足了国内需要,而且向国外出口。目前,我国所栽培的留兰香品种多为“大叶” Introduction Spearmint is one of the important varieties of natural spices, extracted from the stems and leaves of essential oils used as toothpaste, chewing gum and confectionery raw materials. Spearmint cultivation in China began in 1950. For more than two decades, under the guidance of Chairman Mao’s revolutionary line, the rapid development of production has not only satisfied domestic needs but also exported to foreign countries. At present, cultivars cultivated in China are mostly “big leaves”