High-yield cultivation techniques of Kudi Ding

Kudi Ding, alias Zi Hua Di Ding, Di Ding Cao. Dried whole herb for medicinal use, with the effect of heat-clearing and detoxification, mainly for carbuncle swelling, eczema, wind-hot cold, bronchitis, hepatitis, enteritis and so on. The main producing areas are Anhui, Henan, Hebei, Shandong, Jiangsu and other provinces.

The morphological characteristics are annual herbs of Papaveraceae. The root is thin and long, with lateral roots, brown roots. The stem is weak, widely branched, 15-40 cm high, smooth and glabrous, often with 4-5 ridges. Basal leaves and stem leaves alternate, long stipitate, 2-5 cm long; leaf blade ovate in outline, 2-4-pinnatisect, lobes 2-3 pairs, finely stipitate or almost sessile, lobules lanceolate or long with rounded, apex obtuse. The base is oblongate. Racemes axillary, inflorescences 1-6 cm long, with leafy bracts. Flowers lavender, ca. 2 cm, transverse on pedicels, pedicels ca. 2 mm, sepals small, 2 whorls, scalelike; petals 4, outer whorls 2 large, upper 1 petal tail extending into cylindrical spur, spur ca. 0.5 cm, front end microwave, lower petals with shallow fascicles, apex retuse, inner 2 petals smaller, tip dark purple, apical microunion, stamens 6. Filaments United into two flat bundles, with dense glands inserted toward the base of the filament with stamens from the petals; each bundle with 3 yellowish anthers; pistil 1, style thin and short; stigma laterally flattened; ovary superior, oblate columnar, ca. 5 mm, 1-loculed, lateral membranous placenta, most embryos per locule. Capsule, long ellipsoid, green, 7 × 20 mm long, 2 × 6 mm wide, style, stigma persistent, 2-valved. Seeds numerous, reniform, black, glossy. Flowering in May.

First, the growth habit of Di Ding is adaptable and likes a warm and cool climate. Resistant to cold and afraid of drought. Soil requirements are not strict, clay, loam, sandy loam can be planted. For fear of flooding, low-lying land is not easy to grow.

Second, select fields with high terrain and good drainage for soil preparation and fertilization, and cultivate them carefully. Combined with soil preparation, apply sufficient basic fertilizer: 3000 kg of soil miscellaneous fertilizer, 20 kg of urea and 50 kg of phosphorus and potassium fertilizer per mu. Then make beds and wait for sowing.

Third, sow bitter Ding to propagate with seeds. The sowing time is around White Dew. When sowing, spread the seeds evenly on the finished border surface and rake flat so that the soil cover has no seeds. Water to preserve soil moisture to facilitate the emergence of seedlings. The sowing rate is 3 kg per mu.

Fourth, after field management, we should pay attention to ploughing and weeding. It is often watered in dry weather and drained in time in cloudy and rainy weather. Topdressing once before and after closure: 10 kg of urea and 5 kg of potassium dihydrogen phosphate per mu.

5. Prevention and control of diseases and insect pests the main diseases of Kudi Ding are root rot, which can be controlled with 1 ∶ 1 ∶ 120 Bordeaux solution before the disease. Carbendazim was used to control the disease at the initial stage of the disease. Underground pests can be trapped and killed with phoxim and poison bait.

Sixth, the harvest and processing of Di Ding is generally from May to June, when half flower and half seed are harvested. When harvesting, dig out the Didi by the roots to clean the soil. Sun-dried can be used as medicine for sale. The yield is 150 kg per mu.