Planting techniques of Peucedanum praeruptorum

Peucedanum praeruptorum is a commonly used traditional Chinese medicine, which is a perennial herb of the genus Peucedanum of Umbelliferae. It is divided into two kinds: Peucedanum praeruptorum and Peucedanum praeruptorum, both of which are used for medicinal purposes. They are mainly distributed in Zhejiang, Guizhou, Hunan, Sichuan, Jiangsu, Anhui and other places. Most of them are wild and only a few are cultivated, so they have great planting potential. Let's take a look at the planting techniques of Peucedanum praeruptorum.

Growth habits of Peucedanum praeruptorum

Qianhu likes the cold, cool and humid climate, and the soil is better in the sandy soil with deep, loose and fertile soil, the Pingba area with high temperature and long duration and excessive shade, and the place with poor drainage grows poorly and is easy to rot the rot. sticky yellow soil and dry and barren river sandy soil are not suitable for planting. Peucedanum praeruptorum is a perennial root plant, in which the seed buds germinate at the beginning of March and emerge in the middle of March. The vegetative growth period is from April to May, the bolting and budding begins in late May, the flowering period is from June to July, and the fruit is mature from August to September. The growing period of propagated seedlings is longer than that of persistent plants.

Planting techniques of Peucedanum praeruptorum

1. Seed collection: the germination rate of Peucedanum praeruptorum seed is high, which can be propagated by seed, seedling transplanting or direct seeding. The fruit is generally ripe from September to October, when the fruit is yellow and white, cut it with scissors and pedicel, put it indoors and ripen for a period of time, then rub the fruit, remove impurities, dry and store it.

2. Land selection and preparation: choose flat or sloping land with plenty of sunshine and moist soil without stagnant water. It is best to remove the dead and weeds in front of the ground in the winter of the first year, lay them on the ground and burn them, and then dig deep into the land to survive the winter. In February of the following year, the rotten pig and cow manure was applied to turn the soil again to remove weeds and rake fine and flat.

3. Sowing seeds at the right time

① winter sowing: the best sowing time is from the first ten days of November to late January of the following year. Due to the slow germination of Peucedanum seeds (it takes more than 30 days to germinate in good weather), the seeds are usually finished before the year. Spread the seeds evenly on the border, and then gently sweep them with a bamboo broom to fully combine the seeds with the soil. It takes 3 kg / mu to sow clean seeds without impurities.

② spring sowing, sowing in early March, hole sowing or strip sowing can be used. The hole is 8 inch square on the border, and the hole depth is about 1 inch. Sprinkle the seeds with fiery soil ash evenly into the hole, then cover with a layer of soil or plant ash until the seeds are not seen. Finally, covering the grass to preserve soil moisture is conducive to the neat emergence of seedlings, which can be removed when sprouting. The amount of seed used per mu is 2kg to 3kg.

The field management of Qianhu

1. Weeding before sowing: chemical weeding should be based on soil pesticide application before sowing, and one application can ensure that the whole growth period will not be harmed by weeds. Before weeds germinate 5-10 days before seed sowing, 48% trifluralin EC 80ml / mu is sprayed evenly on the topsoil to 40kg water.

2. Weeding before seedling: Bupleurum emerges 15 days after sowing, so before the weeds are green and Peucedanum has not yet emerged, you can spray 25kg of water in the field with 150ml of 20 g water-free agent. You can also choose 41% Roundup or glyphosate 150 ml to spray 30 kg of water. The above agents must not be used to control weeds after the emergence of Bupleurum, so as not to kill the seedlings. According to the test results, the medicine should be sprayed within 14 days.

3. Intermediate ploughing and weeding: interploughing is generally carried out before the row is closed, and the depth of intertillage depends on the growth of the lower part of the base area. The plant of traditional Chinese medicine at seedling stage is small, and weeds are easy to breed, so weeds should be weeded frequently. After the plant grows luxuriantly, weeding should not be used at this time to avoid damaging the plant. Manual weeding can be used, but it is time-consuming and laborious.

4. Rational fertilization: the amount of fertilizer needed for Bupleurum is small, and some pig and cow manure should be applied in the early stage. After the seedlings come out, combined with ploughing and weeding, human and animal dung water or urea can be applied, and some compound fertilizer can be applied later. Be careful not to hurt roots and leaves when fertilizing.

5. Disease and pest control: Bupleurum is mainly powdery mildew. Powdery disease spots appear on the leaf surface after the disease, which gradually expands, and the leaves turn yellow and wilt. The diseased plants were removed and burned in time, and triazole copper was sprayed to prevent and cure the disease.

6. Harvest processing: in November in autumn, first cut off the withered stem, dig out the whole root, remove the soil and dry for 2 or 3 days, and dry when the root becomes soft. Generally, the yield per mu is 300 to 400 kilograms, and the high yield can reach 500 kilograms.