Dry Pinellia is a traditional and commonly used Chinese medicinal herb, and its artificial cultivation requires an understanding of its growth habits.
Dry Pinellia is a perennial herbaceous plant in the genus Pinellia of the Araceae family. It is named for being mostly cultivated in dry fields, and its dried tubers, after processing, are the commonly used Chinese medicinal herb Pinellia ternata. The underground tubers of the plant are spherical or flattened spherical, with the outer skin mostly white or pale yellow, and in the medicinal herb market they are often distinguished from the water-grown Pinellia ternata cultivated in paddy fields.
Dry Pinellia prefers a warm, humid, semi-shaded environment. It fears both strong light and high temperatures as well as drought and waterlogging. After entering the high-temperature period of midsummer, the aboveground parts often show the phenomenon of stem collapse, and the tubers dormant in the soil, then sprout again after the weather turns cooler. In production, it is often intercropped with tall crops such as corn and sorghum, using their shade and cooling to create a suitable microclimate for Dry Pinellia.
Propagation is mainly by tubers and bulbils, and seed seedlings can also be used. Sowing is mostly arranged in spring or late autumn. Planting should choose loose, fertile sandy loam with convenient drainage and irrigation, and attention should be paid to crop rotation to avoid continuous cropping that aggravates diseases. During the growing period, the soil should be kept moist but not waterlogged, and after rain, drainage should be done promptly. Combined with intertillage and weeding, appropriate hilling is beneficial for bulbils to enter the soil and form new tubers.
Common field diseases include leaf spot, viral disease, and tuber rot. Preventive measures can include selecting disease-free seed tubers, promptly removing diseased plants, and strengthening ventilation to reduce humidity. Insect pests also need to be controlled at the same time. In terms of medicinal use, Dry Pinellia is pungent in flavor and warm in nature, and the raw product is toxic, so it must be used after processing. Common processed products include Qing Pinellia, Ginger Pinellia, and Fa Pinellia. Harvesting is mostly carried out in summer and autumn after the aboveground stems and leaves wither. The tubers are washed, peeled, dried in the sun, and then stored for later use. Growers should make reasonable arrangements according to local climate and market demand before production, and develop planting steadily.
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