The latest course of cultivation techniques of Rhodiola

Rhodiola, also known as Rhodiola rosacea, Sao Luomabu, etc., is a perennial herb of the Rhodiola family. Its growth environment is bad, so it has strong vitality and special adaptability, can be used as medicine, can replenish qi and clear lungs, benefit intelligence and nourish the heart, and has extremely high cultivation value. Let's take a look at the cultivation techniques of Rhodiola.

Growth habits of Rhodiola

Rhodiola is distributed in Heilongjiang, Jilin, Xizang, northwest Yunnan, Ningxia, Gansu, Qinghai, Sichuan, Xizang and other places. It grows under forests or grassy slopes in the cold-free zone of 1800m to 2500m above sea level, mostly in the alpine regions of the Northern Hemisphere. Because of its poor growth environment, such as hypoxia, low temperature and dryness, strong wind, ultraviolet radiation and large temperature difference between day and night, it has strong vitality and special adaptability.

Reproductive techniques of Rhodiola

1. Seed propagation: Rhodiola seeds are small, suitable for germination temperature 15-20 ℃, stored for 1 year to lose germination power. Seedlings can be raised in greenhouses or plastic greenhouses, outdoor sunny beds, spring sowing in April, autumn sowing in October, especially autumn sowing, strip sowing or sowing, covering fine soil and grass after sowing, always keep the seedbed moist, prevent people and animals from trampling on the bed, and give proper shade when the sun is too strong. Cultivated for one year, it was transplanted from late April to early May or mid-late September.

2. Rhizome propagation: Rhodiola rhizome propagation is usually combined with harvest to select a larger rhizome, cut it into small segments of 3 cm to 5 cm, and let it dry for 1 to 2 days to make the wound heal. Spring planting from April to May, autumn planting from September to October, it is appropriate to cut in autumn, according to the bead spacing of 2025cm × 1015cm, oblique planting, covering soil, slightly suppressing.

Cultivation techniques of Rhodiola

1. Garden selection: Rhodiola is generally wild in Xiangyang slopes, stone gaps, alpine meadows, alpine rock crevices, hillside grasslands, edge of thickets and alpine dry sandy soil. It has strong adaptability, likes slightly cool and humid climatic conditions, cold and drought tolerance, and is not very strict on soil. it should be cultivated in mountainous areas with high altitude, cool climate, short frost-free period and large temperature difference between day and night in summer.

2. Soil preparation and fertilization: after land selection, the depth is 30cm to 40cm, the field debris is cleared, the soil is broken, and the border is made along the slope, with a width of 100cm to 120cm, a height of 20cm, and a width of 50cm to 70cm. Combined with cultivated land, 30-50,000 kg of barnyard manure or pigsty manure and 20 kg of compound fertilizer are applied per hectare, raked and leveled. Higher flat land can be border, lower land can also be ridge cultivation, hillside land and hillside non-arable land can only be ploughed and raked fine, no ridge, no border, but to dig drainage ditch.

3. timely seedling emergence: Rhodiola seedlings were transplanted after growing for one year, and the transplanting time was after the aboveground part withered in the autumn of that year or before turning green in the spring of the second year. The effect of transplanting in spring is better. Generally, when the seedlings have not yet germinated from late March to early April, all the seedlings will be dug up first.

4. graded transplanting: Rhodiola was transplanted according to seed size, planting row spacing 20 cm, plant spacing 10 cm 12 cm, horizontal border trench, ditch depth 10 cm 12 cm, the top bud was planted upward into the ditch, the thickness of the cover soil was 2 cm to 3 cm, and it was slightly suppressed after planting. When the soil was too dry, it was necessary to water about 50 large seedlings per square meter, and 60 seedlings could be planted.

5. Harvest and processing: after the aboveground part of Rhodiola was withered in autumn, the aboveground withered stems and leaves were removed first, the underground part was dug out, the soil was removed, washed with water, and dried under the condition of 60-70 ℃, or the washed medicinal materials were steamed in a pot for 7-10 minutes, then dried in the sun or in a drying room. When the medicinal materials reached 70 or 80% dry, the roots and rhizomes were straightened and aligned at the top. Several roots are tied up into small handfuls and baked until fully dry.

6. pest control: the disease of Rhodiola mainly occurs at the cut of rhizome propagation seedlings, which is easy to form root rot, which can be prevented by disinfection and sterilization before planting. Insect pests are mainly aphids and small red pearl butterflies and other Lepidoptera pests, which are sprayed with environment-friendly insecticide 3% hypertonic phenoxarb EC0.025~0.033% solution to control.