药材种植和农作物一样,合理轮作可趋利避害,夺取高产。根类药材,如山药、白芷、地黄等,其药用部分生长在地下,要求土质疏松,并需要较多的磷钾肥料,因而以谷类作物为其前茬比较适宜。 叶类和全草类药材,如莨菪、蔓陀罗、洋地簧、薄荷、荆芥等,肥沃的土壤和充足的氮肥,能促进其生长、提高产量,因而豆科作物或蔬菜是它们良好的前茬。 Like the cultivation of medicinal plants, crop rotation can be advantageous and avoid disadvantages, to seize high yield. Roots of medicinal herbs, such as yams, Angelica, Rehmannia, the medicinal part of the growth in the ground, requiring soil loosening, and more phosphorus and potassium fertilizer, which cereal crops for the first crop is more appropriate. Leafy and whole-herbaceous herbs such as scoparia, datura, ocean spring, peppermint, schizonepeta, etc., fertile soil and abundant nitrogen fertilizers promote their growth and yield, so they are good for leguminous crops or vegetables The former crop.