Irrigation and Drainage in the Cultivation of Chinese Medicinal Materials

Moisture is one of the important conditions for the growth and development of Chinese herbal medicines. Insufficient water and plants are wilting, while the production is reduced, and the weight is dead. Excessive water, stems and leaves are long and mature, and even the root suffocates. Therefore, irrigation and drainage is the key to planting Chinese herbal medicine.

I. General Principles of Irrigation Irrigation needs to be treated differently according to the habits of different Chinese medicinal materials, such as licorice, ephedra and other like drought, should be less watering; such as Alisma, lotus and other aquatic herbs like hi wet, you can not lack of water. Usually from the sowing to flowering of annual Chinese herbal medicines, the water requirement increases continuously, and the water requirement at the flowering peak begins to decrease. The general Chinese herbal medicine should be treated with irrigation and shallow irrigation at the seedling stage, and should be regularly watered during the growth period. The water requirement is more stringent during the flowering period, and too much water often causes flowering, and too little affects the fertilization. In the fruit period, if it does not cause fruit drop, it may be properly wet, and it should be stopped near the mature period. In order to reduce the difference between soil temperature and water temperature, summer irrigation should be carried out in the morning and evening.

Second, irrigation methods are furrow irrigation, flood irrigation, flood irrigation, sprinkler irrigation, drip irrigation, infiltration, etc. At present, more commonly used are barn irrigation and furrow irrigation. Where conditions permit, it should be developed in the direction of sprinkler irrigation and drip irrigation, with a minimum of water for higher yields.

3. Drainage ditches should be dug before the rainy season begins. When the groundwater level is high, the soil is wet, and there is accumulated water in the fields, it should be discharged in time to avoid rot and even spread the disease.

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