无公害蔬菜──大棚香椿的栽培技术（一）山东省寿光县第一职业高中胡友良本栏编辑史和平香椿是我国特有树种，适应性广，抗逆性强，寿命较长，具有良好的产芽习性，嫩芽有浓郁的香味，是我国北方上等蔬菜。随着生产的发展和人民生活水平的不断提高，对香椿栽培技术的要求也越 Pollution-free vegetables ─ ─ toothed cultivation techniques in greenhouse (a) Shouguang County, Shandong Province, the first occupation high school Hu Youliang edit this column history of peace toon is endemic tree species, wide adaptability, strong resistance, long life expectancy, with good Bud habit, buds have a rich flavor, is the finest vegetables in northern China. With the development of production and continuous improvement of people’s living standard, the requirements of toon cultivation techniques are also higher