Planting technique of Rehmannia glutinosa

The first step is sowing, which can be sown in spring and autumn, the spring sowing time is from mid-April to early May, and it is suitable for autumn sowing in October; the second step is to select and prepare low-lying and fertile land, and do a good job of ploughing, leveling and fertilization; the third step is seedling management to ensure moisture, light and temperature; the fourth step is transplanting, either in spring, summer or autumn. Finally, do a good job in field management, including weeding, drainage and irrigation, fertilization and so on.

The main points of sowing rejuvenated grass:

1. The best time for seed harvest is late September, and the seeds fall off naturally in the evening, so it is difficult to collect them, and the seeds are dried and set aside after harvest. The seeds are very small, slender, 0.3 cm-0.5 cm in length, 0.1 cm in thickness, yellowish brown. The germination rate of new seeds can reach about 80%, and the germination rate of seeds in the next year is very low, and there is no production capacity.

two。 Because the seeds of Rehmannia mandshurica are small, a certain temperature, humidity and shade are needed during germination, and the effect of direct seeding is poor, so the method of seedling raising and transplanting must be adopted. Seed germination treatment: before sowing, soak the spare dried seeds with clean water, soak the seeds with 500PPm gibberellin solution for 6-8 hours, fish out and mix fine river sand, the proportion is 1:2, put in a plastic basin, temperature 15 ℃-22 ℃, humidity 65%, germination treatment 5-7 days, when the seeds are 50% white, sow seeds in spring.

3. The returning grass can be sown in spring and autumn, and it is better to sow seedlings in spring. The sowing time is from mid-April to early May in spring and October in autumn. There are two methods of sowing: one is to open trenches to sow seeds. The method is to cut the bed into deep 1cm and wide 5cm-6cm grooves according to the row spacing of 10cm, and sow the seeds with an on-demand seeder. Then use a rake to level the bed surface and cover the soil with 0.3cm-0.5cm. After compacting with wood, cover the straw with 2cm thickness and water it once. Another method is to sow the seed directly on the bed, either spreading or strip sowing, then compacted with wood, covered with 2cm thick straw and watered once.

In addition to medicinal use, the grass can also be used as a ground cover plant on the edge of the lawn.