High-yielding cultivation techniques of Radix Glehniae

Nansha ginseng, alias wheel leaf sand ginseng, Changbai sand ginseng, bright leaf vegetable willow root, grass ginseng and so on. The underground rhizome is used as medicine, which has the effects of nourishing yin, clearing lung heat, expectorant and relieving cough. Main treatment of pneumonia, bronchitis, cough phlegm and other diseases. Mainly produced in Anhui, Guizhou, Sichuan, Hunan, Hubei, Jiangsu, Zhejiang and other provinces.

The morphological characteristics are perennial herbs of Campanulaceae with white milk. Roots conical, yellowish brown, striated. Stem 60-90 cm tall, glabrous or subglabrous. Cauline leaves 2-6 whorled, sessile or with inconspicuous stalks, leaf blade ovate, elliptic-ovate, margin serrate, sparsely pubescent on both sides. Inflorescences paniculate, 35 cm long, glabrous; branches whorled; flowers pendulous; calyx glabrous, lobes 5; Corolla blue, mouth miniaturized into altar-shaped, glabrous, 5-lobed; stamens 5, often slightly protruding, filaments widened proximally, margin densely pilose; disk cylindric. Ovary inferior; style protruding. Capsule obovoid, ca. 5 mm.

First, growth habits Nansha ginseng prefer a warm and humid environment, drought tolerance, avoid continuous cropping. The requirement to the soil is not strict, the general soil can be cultivated. But it is better to have a deep, loose and fertile sandy loam. Low-lying land, saline-alkali land is not easy to cultivate.

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, 20 kg of urea and 50 kg of phosphorus and potassium fertilizer per mu. Then make beds and wait for sowing.

Third, sow Nansha ginseng seeds and propagate. The sowing time is autumn sowing and spring sowing. Autumn sowing before freezing, spring sowing around Qingming Festival. It is better to sow in autumn. Before sowing, first open a shallow ditch on the finished border, then spread the seeds evenly into the ditch, cover the soil and water to preserve moisture, in order to facilitate the emergence of seedlings. The sowing rate is 1 kilogram per mu.

Fourth, after the emergence of Nansha ginseng seedlings in field management, attention should be paid to ploughing and weeding. If planting on a large scale, herbicides should be used to treat the soil before seedling, which can effectively control all kinds of weeds. Pay attention to watering in dry weather and timely drainage in cloudy and rainy weather. Seedling height 5 cm time seedling, remove over-dense weak seedlings. Before and after the Beginning of Autumn, fertilizer should be applied once: 10 kg of urea and 10 kg of potassium dihydrogen phosphate per mu.

5. the main diseases and insect pests of Nansha ginseng are root rot. In addition to paying attention to drainage in overcast and rainy weather, the diseased plants should be pulled out in time and disinfected with lime powder. Can also be used before the onset of the disease with 1-100 Bordeaux spray prevention and treatment. Or use 65% mancozeb in the early stage of the disease. Aphids are used to control aphids. Underground pests are trapped and killed with phoxim and poison bait.

6. harvesting and processing of Nansha ginseng is generally in the autumn of 2-3 years, and the aboveground stems and leaves are withered and dug. Before mining, cut off the aboveground stems and leaves, dig out the underground roots, remove the soil, peel off the outer skin, dry or dry and then be sold as medicine. The yield per mu is 250 kg.