High-yield cultivation techniques of dodder

Dodder, alias bean parasite, rootless grass, rootless vine, yellow rattan and so on. Seed for medicinal use, has the effect of nourishing liver and kidney, tonifying essence and eyesight, relieving diarrhea and calming fetus. It mainly treats sore waist and knees, slippery leakage of yang fistula, frequent urination, dizziness, loss of vision, fetal movement, threatened abortion, hypertension and so on. Mainly produces Northeast, North China, Northwest, East China and other regions.

The morphological characteristics are annual herbaceous vines of Convolvulaceae; the stems are slender and orange, with suckers on them and parasitic entanglements on other plants. Leafless. Flowers open in summer and autumn, white, small and numerous, clustered into globose Cymes, with bracts and bracteoles; calyx shallowly cup-shaped, ca. 2 mm, 5-lobed, lobes triangular-ovate; Corolla campanulate or pot-shaped, ca. 4 mm, lobes ovate, outer reflex; stamens 5, alternate with Corolla lobes, filaments short; scales 5, located near base of Corolla tube, oblong, margin with fimbriate eyelashes Ovary superior, 2-loculed, each locule has 2 ovules, style 2, erect, stigma capitate. Capsule subglobose, ca. 3 mm, with persistent Corolla on the outside, cleft at maturity; seeds 2-4, light brown, ca. 1 mm, surface scabrous.

First, the growth of dodder likes high temperature and humid environment. It is highly adaptable and often parasites in Leguminosae, Compositae, Liaoke and other plants. The growth period is about 100 days. Artificial cultivation is longer than the mixed species of legumes.

Second, soil preparation and fertilization select fields with high terrain and good drainage for intensive cultivation. Combined with soil preparation, apply sufficient basic fertilizer: 3000 kg of soil miscellaneous fertilizer, 15 kg of urea and 50 kg of phosphorus and potassium fertilizer per mu. And make a high bed, waiting to be sown.

Third, sow dodder and propagate with seeds. The sowing time is spring sowing and autumn sowing. Sow soybean seeds evenly into the soil, sowing amount of 7 kg per mu. When the soybean seedlings are 20 centimeters high, the dodder seeds are sown in the soybean field. The sowing rate is 1.5 kg per mu.

Fourth, field management of soybean seedlings should pay attention to ploughing and weeding. It is often watered in dry weather and drained immediately in cloudy and rainy weather. After the dodder seedlings, there is no need to weed. Topdressing from July to August: 5 kg of urea and 5 kg of potassium dihydrogen phosphate per mu.

Fifth, pest control is mainly to control common soybean diseases and insect pests. Leaf spot disease was controlled by carbendazim, yellow blight was controlled by fulvic acid, and bean borer was controlled by carbendazim.

Sixth, harvest and processing before and after the autumn equinox, 1/3 of the beans withered, the dodder shell turned yellow, can be cut off together with the bean plants. After drying and threshing, the seeds of dodder are screened out to remove impurities and can be sold as medicine.