半夏为天南星科多年生草本植物,其块茎有燥湿化痰、降逆止呕、清痞散结之功效,为常用大宗药材。半夏系阴生植物,若生长在半阴半阳土地上,植株健壮,生长期长,药材产量高;但若无荫蔽条件,直接在阳光下暴晒,就会发生倒苗,块茎 Pinellia is a perennial herb of Araceae, its tubers have dampness and phlegm, Jiangni vomiting, the effect of Qingpagisanjie, is commonly used bulk medicine. Pinellia system Yinxian, if grown in the half-Yin and half-Yang land, plant robust, long growth period, high yield of medicinal herbs; but without shading conditions, direct exposure to the sun, it will happen inverted seedlings, tubers