一、甜菊的生物特征甜菊为多年生菊科植物,原产于美洲的巴拉圭等国。1964年巴拉圭开始进行人工栽培。我国从1977年开始引入。山东省济宁市从1986年开始引种,现已大面积种植,亩产甜菊干叶250～300公斤,高的达400公斤以上,亩产值达2500元以上,亩纯收入在2000元以上,是一种高价值的经济作物。用其加工成的甜菊糖,甜度高、热量低,已 First, the biological characteristics of stevia Stevia as a perennial Compositae, native to the Americas Paraguay and other countries. Paraguay started artificial cultivation in 1964. Our country was introduced from 1977. Jining City, Shandong Province, introduced since 1986, is now a large area planted acres of dried leaves of sweet carrot 300 ~ 300 kilograms, up to 400 kilograms, more than 2,500 yuan per mu, net income of 2,000 yuan or more, is a High-value cash crops. With its processed stevia, sweetness, low calorie, has