In the summer, if the temperature exceeds 30°C or even exceeds 35°C, and the relative humidity is less than 60%, the "dry hot wind" climate lasting for more than 3 days will be extremely harmful to the production of Chinese medicinal materials.
Therefore, Chinese herbal medicines in the high-temperature period should be protected by the following measures:
1. Improve water conservancy facilities and increase water storage capacity.
2. Scientific management of water, with water cooling and humidification, can be fully watered in the morning and evening, to maintain humidity, a large area can be sprinkler irrigation, but the drainage ditch should be open, to prevent water, resulting in high temperature and humidity, leaves rot rotten.
3. Manuscripts such as manuscripts or rice straw can be used to weave straw awnings and shade the sheds so that medicinal herbs will not be affected by high temperature during the growing season and increase production.
4. During high temperature, it is necessary to top-dress fertilizers and chase fertilizers. Avoid using concentrated fertilizers to prevent “burning heartâ€.
5. The amount of fertilizer to be applied should be small, with urea per acre not exceeding 13kg; ammonium sulfate not exceeding 25kg; ammonium bicarbonate not exceeding 35kg. Organic manure must be decomposed and cooked before being used. Fresh manure and livestock excrement must not be used to harm the fired plant.
6. During the high temperature period, pesticides are banned to avoid overheating, burning leaves and heart buds, affecting normal growth.
Although the growth and development of Chinese herbal medicines requires a certain temperature, the high temperatures will be counterproductive throughout the day. The light plants will dry out, and the entire plants will die, resulting in reduced or no harvest. Therefore, medicine and farmers around the world must master the management techniques in the high-temperature period and properly handle the relationship between drought and flood, so that the medicinal plants can safely pass through the high-temperature period and provide reliable protection for high yield and yield of medicinal materials.
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