板兰根又名大兰根、大青根、兰靛、青靛。系十字花科大青属两年生药用草本植物。系深根性植物,株高50～90厘米。其叶和根均可入药。对气候适应性强,耐严寒、喜温暖、怕水涝。我国南北广大地区均有栽培。其栽培技术如下: 一、选地整地 选地势平坦或丘陵及山区的缓坡,以土层深厚肥沃、排水良好、疏松的砂壤土或红黄壤土为宜。667平方米施厩肥3000公斤、过磷酸钙50公斤或饼肥250公斤。撒匀后深翻30厘米左右,这样根生长顺直、不分叉、入土深。耙平后作成25～30厘米的高畦,再按沟 Plate Langen, also known as the big roots, large roots, indigo, indigo. Department of Crucifer is a biennial medicinal herbs. Department of deep root plants, plant height of 50 to 90 cm. Its leaves and roots can be used as medicine. Adaptable to the climate, cold-resistant, hi warm, afraid of waterlogging. China’s vast areas have cultivated both north and south. The cultivation techniques are as follows: First, the election site preparation Either flat or flat hills and hills and gentle slope to soil deep and fertile, well-drained, loose sandy loam or red-yellow loam is appropriate. 667 square meters of manure 3000 kg, 50 kg of superphosphate or cake fertilizer 250 kg. Scattered after deep plowing about 30 cm, so root growth straight, not forked, deep into the soil. Harrow made after the height of 25 to 30 cm, and then ditch