1, land selection and land preparation
Rehmannia glutinosa has strong growth ability and can quickly adapt to various soils. However, in order to increase the output of artificial planting, it is still necessary to choose rich and sufficient deep soft sand with normal irrigation and drainage. Then in the winter and spring before planting, do a good job of soil preparation and deep ploughing, with a depth of about 30cm. Moreover, in order to ensure that the soil is fertile enough, after soil preparation, it is necessary to apply sufficient decomposed farmyard manure and appropriate amount of calcium superphosphate. Finally, level the rake to make the planting frame.
2, timely sowing
The main propagation material of Rehmannia glutinosa is rhizome, and the mother stem is mainly the plant planted that year. Cut off the head and tail of the mother stem, select the middle part for cultivation, cut off the head and tail, and then cut into small pieces of about 4-5cm. Leave 2-3 buds in each segment. After incision, dip the incision with plant ash to promote the healing of the incision. After a little air drying, it can be planted. Pay attention to the planting density when planting, control the spacing between plants at about 28*35cm, dig planting holes, and put two small pieces in each planting hole. Cover with a layer of fine lime soil, strengthen management and wait for emergence.
3. Water and fertilizer management
Rehmannia glutinosa has a great demand for nutrition. Plantar fertilizer should be applied before planting. In the process of planting, topdressing should be done in time to meet the nutritional needs of Radix Rehmanniae Preparata. After thinning, topdressing should be carried out for the first time, and the fertilizer is mainly calcium superphosphate to promote rhizome growth. Then when sealing, sprinkle appropriate amount of plant ash between rows to promote plant growth. Rehmannia needs a lot of water in the early growth stage, so it should be watered frequently, but it should be controlled during the stem expansion period to avoid too much water. In addition, drainage should be done well in rainy season to prevent retting roots from rotting and causing pests and diseases.
4. Tian Tuan management
When the seedlings grow to about 1 1 cm, the thinning work should be done well. Leave strong seedlings at intervals, one for each seedling hole. If there is a shortage of seedlings, healthy seedlings with consistent growth should be replenished in time. The growth ability of Rehmannia glutinosa in seedling stage is weak, and the root system distribution is shallow, so it should not be too deep in cultivation to avoid damaging the root system of Rehmannia glutinosa. Weeds around the seedlings should be pulled out by hand and cannot be cultivated after sealing. Finally, it is necessary to eradicate the underground thin stems growing along the surface in time to avoid excessive consumption of nutrients and affect the normal growth of Radix Rehmanniae Preparata.
The above is a brief introduction to the cultivation techniques of Radix Rehmanniae Preparata. Although the cultivation of Radix Rehmanniae Preparata is relatively simple, its management is relatively extensive. However, when planting, it is still necessary to prevent pests and diseases from harming the growth of Radix Rehmanniae and affecting the planting efficiency. Let's call it a day. This article is for reference only. Thank you for your reading and support.
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