Summer sowing Banlangen is good.

Radix Isatidis is one of the best-selling bulk medicinal materials in the market at present, which can be sown in spring, autumn and summer. However, from our experiments and demonstrations in the past two years, summer planting Radix Isatidis is very popular among drug farmers because of its short growth period, excellent quality, high yield, no impact on post-flowering crops and relatively high benefits. The average yield per mu is 450kg of Radix Isatidis and 120kg of Daqing Leaf, with an income of about 1500 yuan per mu. The cultivation techniques are briefly introduced as follows:

1. After soil preparation and fertilization, summer crops such as wheat and potatoes are harvested, the soil is deeply ploughed in time, and 2000 kg of organic fertilizer and 50 kg of superphosphate are applied per mu of soil preparation. Then level the rake and make a high bed 1.3 meters wide, leaving a good drainage ditch around.

2. Sowing summer sowing is generally between late May and early June, and it is best to use strip sowing. On the finished border surface, a shallow ditch was opened according to the row spacing of about 20 cm, with a depth of 2-3 cm, and then the seeds were evenly sowed into the ditch with a sowing amount of about 1.5 kg per mu. After sowing, the soil was covered with fine soil 2 cm thick to keep the soil moist, and seedlings could emerge in 6-7 days.

3. Field management: when the height of seedlings is 7-8 cm, the seedlings should be interspersed. When the height of seedlings is 10-12 cm, the seedlings should be fixed according to the distance between plants about 12 cm. After the seedlings were fixed, the weeding was carried out for the first time, and then weeded every 26 days or so, keeping the field free of weeds, stopping intertillage and weeding, combined with weeding, applying human and animal dung water once, 1500 kg per mu. If you encounter dry weather after sowing in summer, you should water it in time. When Rain Water is too much, you should clear the ditch and drain in time to prevent stagnant water in the field.

4. Harvest and process the big green leaves at one time in late September, cut them from the stem of the plant 2 cm away from the ground, cut them back to 78% dry, tie them into small handfuls, continue to dry them all, and dry the Kang in time when you encounter cloudy and rainy days. The underground roots are dug in the middle and late October. When digging, the integrity of the roots should be maintained as far as possible to avoid root injury or root breakage. After being transported back, the soil and Reed heads should be removed, washed, and tied into small bundles when the sun is 70 or 80% dry, and then dried completely. In case of continuous rain, the Kang should dry in time.