High-yielding cultivation techniques of Peucedanum praeruptorum

Qianhu, alias Bai Hua Qianhu, dog head Qianhu, Qianhu head, etc. The underground root is used as medicine, which has the effect of resolving phlegm and relieving cough and dispersing wind and heat. Clinical treatment of wind-heat cough, phlegm asthma, chest and diaphragm tightness and other diseases. Mainly distributed in Zhejiang, Hunan, Sichuan, Jiangsu, Anhui and other places, mostly wild, only a small amount of cultivation.

Morphological characteristics

1. Peucedanum praeruptorum: a perennial herb of Umbelliferae, about 1 meter high. Roots erect, conical, with a few branches, pubescent, proximally glabrous. Cauline leaves long stalked, base enlarged into a sheath-shaped clasping stem; leaf blade broadly triangular-ovate, Ternate-2-3-pinnately divided; midrib pubescent on both surfaces, margin coarsely serrate; basal leaves similar to cauline leaves, but leaf sheaths broad. Compound umbels terminal or lateral, pilose; umbellules with about 20 flowers, pedicels unequal, pilose, petals 5, white, broadly ovate to suborbicular, stamens 5, ovary inferior. Fruit ovate-elliptic, pubescent.

2. Peucedanum praeruptorum: perennial herb, 1-2 meters high. Roots thick, conical, branched. Stem erect, Terete, longitudinally furrowed, smooth, purple, upper part branched, pilose. Basal leaves with long stalks and broad leaf sheaths at base; leaf blades stout papery, triangular-broadly ovate, Ternate-1-3-pinnatifid, dark green above, green-white below, margin densely serrate; upper leaves of stem gradually degenerated, purple leaf sheaths dilated into pockets. Compound umbels terminal and lateral, purple, pilose; petals ovoid, dark purple. The fruit is oval.

I. growth habits

Qianhu likes a warm and humid environment. Resistant to cold and drought, afraid of water stains. To the soil requirements: the soil layer is deep, loose and fertile, rich in organic matter sandy loam is better. Heavy clay, saline-alkali land and low-lying land are not suitable for planting.

II. Soil preparation and fertilization

Select high-lying, well-drained fields and cultivate them carefully. Combined with fertilization, apply sufficient basic fertilizer: 3000 kg of soil and miscellaneous fertilizer per mu. Urea 20 kg, phosphorus and potassium fertilizer 50 kg. Then make beds and wait for sowing.

Third, sowing seeds

Bupleurum multiplied with seeds. The sowing time is divided into spring sowing and autumn sowing. Spring sowing before and after the Qingming Festival, autumn sowing before freezing.

Before sowing, make a shallow trench on the finished border surface with a rake, then spread the seeds evenly into the ditch 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.

IV. Field management

Pay attention to ploughing and weeding after Qianhuqi seedlings. 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. The Beginning of Autumn should be fertilized once before and after topdressing: 10 kg urea per mu, 10 kg potassium dihydrogen phosphate and 1000 kg human feces and urine.

Prevention and control of diseases and insect pests

If it is found that the disease of Peucedanum praeruptorum is rarely controlled by conventional methods, it is mainly powdery mildew. After the disease, powdery spots appear on the leaf surface, gradually enlarge, and the leaves turn yellow and wilt. Prevention and treatment: diseased plants were pulled out and burned in time, and triazole copper was sprayed to prevent and cure. The main pests are armyworm, which can be controlled by pyrethroid pesticides in the early stage of insect pests. Aphids are used to control aphids. Underground pests are trapped and killed with octane scales and poison bait.

VI. Harvest and processing

Bupleurum is generally harvested after the aboveground stems and leaves withered after autumn. First cut off the aboveground stems and leaves, then dig out the underground roots, dry them in the sun, and then be sold as medicine. The yield is 400 kilograms per mu.