Cultivation Techniques and Management Key Points for Prepared Rehmannia
Prepared rehmannia, also called rehmannia, is a medicinal herb in the family Orobanchaceae. The main medicinal part of prepared rehmannia is the rhizome, which has effects such as nourishing yin and tonifying blood. It is widely cultivated in China and abroad, and prepared rehmannia has a fairly large distribution range. Now, as demand for prepared rehmannia keeps growing, its cultivation area is also becoming broader. So how should prepared rehmannia be cultivated? Below, the editor brings you the cultivation techniques for prepared rehmannia. Let's take a look!
1. Land selection and soil preparation
Although prepared rehmannia has fairly strong growth ability and can quickly adapt to various soils, if you want to increase yield through artificial cultivation, you first need to choose a deep, loose, fertile sandy soil with normal drainage and irrigation. Then, before planting, do the soil preparation work in winter and spring, carrying out deep plowing and intertillage, with the depth maintained at about 30 cm. And to ensure the soil is sufficiently fertile, after soil preparation you should also apply plenty of decomposed farmyard manure, together with an appropriate amount of superphosphate. Finally, level it and harrow it finely, and make beds ready for planting.
2. Timely planting
The main propagation material for prepared rehmannia is mainly the rhizome, and the mother stems are mainly taken from plants grown the previous year. Cut off the head and tail of the mother stem, select the middle part for cultivation, and after removing the head and tail, cut it into small sections of about 4-5 cm. Each small section should retain 2-3 bud eyes. After cutting, dip the cut ends in plant ash to promote healing of the cuts, let them dry slightly in the wind, and then they can be planted. When planting, pay attention to planting density, dig planting holes with a spacing of about 28*35 cm, and place two small sections in each planting hole. Then cover with a layer of burnt soil ash and fine soil, strengthen management, and wait for emergence.
3. Water and fertilizer management
Prepared rehmannia has a relatively large demand for nutrients, so in addition to applying sufficient base fertilizer before planting, we should also topdress in time during the growing process to meet its nutritional needs. After thinning the seedlings, carry out the first topdressing, mainly with superphosphate, in order to promote rhizome growth. Then, when the rows close, sprinkle an appropriate amount of plant ash between the rows to promote plant growth. In the early growth stage, prepared rehmannia has a relatively large water requirement, so we should water frequently, but during the rhizome enlargement stage, watering should be controlled to avoid excessive moisture. Also, in the rainy season, do good drainage work to prevent root rot from waterlogging and the occurrence of pests and diseases.
4. Field management
When the seedlings grow to about 11 cm, do the thinning work well. When thinning, keep the robust seedlings, leaving one plant per hole opening. If there are holes missing seedlings, then promptly fill them with healthy seedlings of similar growth. During the seedling stage, prepared rehmannia has weak growth ability and its roots are distributed relatively shallowly, so when intertilling, do not go too deep, to prevent damaging the roots of prepared rehmannia. Weeds around the seedlings should be pulled by hand, and after the rows close, intertilling should not be carried out. Finally, promptly remove the underground slender stems growing along the soil surface, to avoid excessive nutrient consumption affecting the normal growth of prepared rehmannia.
The above is a brief introduction to the cultivation techniques for prepared rehmannia. Although the cultivation of prepared rehmannia is relatively simple and its management is relatively extensive, during planting you still need to do good prevention and control of pests and diseases, to prevent pests and diseases from harming the growth of prepared rehmannia and affecting planting benefits. That is all for today's introduction. This article is for reference only. Thank you for your reading and support.