Planting experience: what are the high-yield artificial cultivation techniques of Houttuynia cordata Thunb? Attached efficacy and function

Houttuynia cordata also known as dog heart grass, broken ears dog point ear, spicy, slightly cold, slightly bitter. Summer stems and leaves luxuriant flowers and spikes more time to harvest, remove impurities, dry. So what are the high-yield cultivation techniques of Houttuynia cordata? What is the efficacy and function?

What are the high-yield artificial cultivation techniques of houttuynia cordata?

1. Plant characteristics and biological characteristics

Houttuynia plant height 15-30 cm, underground stem creeping growth, white. Stems erect at upper part, prostrate at base, purplish red, glabrous. Leaves alternate, cordate, 3-8 cm long, 4-6 cm wide, apex acute, entire, slightly purple above when old, purplish red below, glabrous on both surfaces except veins; petiole 1-3 cm long, often sparsely hairy; stipules membranous, lanceolate, base joined to petiole in sheathlike form. Spike is born at the top of stem and leaves opposite, long 1-3 cm, base has 4 white petaloid involucre, long 1-2 cm, flowers small and dense, bisexual, without perianth, bracts linear; stamens 3, filaments slender, pistil by 3 lower connate carpel composition, ovary superior, style separate. Capsule urceolate, apically dehiscent. Seeds ovoid, striate. Flowering from April to July, fruiting from June to September.

Houttuynia cordata originally grows in low-humidity depression, ditch edge, ridge, high requirements for water, the whole growth period requires sufficient water supply, keep the soil moist; in warm and humid environment growth is better, afraid of frost, underground stem is more cold-resistant, in-15℃ below winter, 12℃ began to germinate, growth temperature 16-25℃; on the soil and light requirements are not strict, rich in organic matter soil is better.

II. Land selection and preparation and application of base fertilizer

(i) Selection of plots. In order to obtain higher rhizome yield, the sandy loam with flat, abundant water, convenient irrigation, deep tillage layer, suitable soil structure, good physical and chemical properties and moderate fertility should be selected for planting.

(ii) Fine soil preparation. After selecting the plot, thoroughly remove weeds and previous crop orange stems, and deeply plow and sunburn the soil. Before planting, deep ploughing and harrowing shall be carried out, and sufficient base fertilizer shall be applied to make the plot loose, fertile and flat.

(3) Apply sufficient base fertilizer. Before planting, 1000-1500 kg of decomposed farm manure and 150-200 kg of plant ash are applied per mu, and ploughing is carried out once, with a depth of 25-30 cm, so that the fertilizer is fully mixed with the soil.

(4) opening soil for planting. After soil and fertilizer are fully mixed, opening soil is carried out. The width of soil moisture is 2-2.5 meters, the width of ditch is 30-35 cm, and the depth is 25-30 cm.

III. Reproductive methods

Houttuynia cordata generally adopts asexual propagation, rootstock propagation and cuttage propagation, but the effect of rootstock propagation is better, time-saving and labor-saving, and the yield is higher.

Rhizome propagation. All seasons can be sown, but winter, spring and early summer sowing when the crop can be harvested, generally the best time for sowing in the spring or so, before the plant does not germinate new seedlings, the rhizome dug out, cut into 8-10 cm long, with 2-3 more axillary buds of the small segment, and leave fibrous roots. According to the row spacing of 20-25 cm, open a shallow ditch of 5-8 cm deep, arrange the cut rhizomes in the ditch according to the plant spacing of 8-10 cm, cover the soil with 6 - 10 cm, the soil is wet without watering, when the soil is dry, properly irrigate, keep the soil moist, and seedlings can be seen after 15-20 days.

IV. Field management

(i) intertillage and weeding. After planting Houttuynia cordata, weeds must be removed frequently. Weeds can be cultivated before sealing, weeds can be pulled manually after sealing, and fertilizer and water management should be done well in combination with intertillage and weeding.

(ii) Water and fertilizer management. Keep the soil moist throughout the growing season. Early growth is slow, seedlings survive to seal before the row, mu topdressing urea 8-10 kg as seedling fertilizer, stem and leaf growth peak requires a larger amount of fertilizer, topdressing compound fertilizer 10-15 kg per mu. After that, it was changed to topdressing outside the root, spraying with 0.4% potassium dihydrogen phosphate solution once every 7 days, a total of 4-5 times. When the plant height is more than 10 cm, cultivate soil in time, do not irrigate polluted dirty water during the whole growth period, prohibit the application of garbage, unfermented human (animal) feces and urine, nitrate nitrogen (ammonium nitrate), etc., and do not apply any fertilizer within 30-35 days before harvest.

3) Remove the flower buds. When the aboveground part grows excessively, the tender stems and leaves should be harvested in time; the buds should be removed in time when flowering and budding, so as not to consume a lot of nutrients and inhibit the growth of underground stems.

(4) Pest control: Houttuynia cordata rarely has pests and diseases, and generally does not need chemical control. Occasionally encountered root rot, available 70% thiophanate-methyl solution of 1000 times for irrigation.

5. Timely harvest

The tender stems and leaves can be harvested from April to October and can be harvested many times. The underground stem as a product can be harvested one after another according to market demand after October. After harvest, wash and tie the market. During storage and transportation, water properly for preservation. The storage and transportation process must keep the product clean and hygienic, and the interval from harvest to sale should not be too long, otherwise the rhizome will easily yellow and affect the sales price.

Attachment: Efficacy

Houttuynia cordata is pungent in taste and cold in nature. It can clear away heat and toxic materials, relieve pain and swelling, cure sores, diuresis and dehumidification, strengthen stomach and digest food. It can be used to treat lung carbuncle, sore, hematochezia, hemorrhoids and heat accumulation in spleen and stomach caused by excess heat, heat toxin, dampness pathogen and heat.

The medicinal value of Houttuynia cordata

1. Antibacterial

Modern research shows that its special odor mainly comes from an effective component in the volatile oil of Houttuynia cordata-houttuynia cordata (decanoylacetaldehyde). Ichthybilin is the main antibacterial component of Houttuynia cordata L., which has obvious inhibitory effect on catarrh coccus, influenza bacillus, pneumococcus and Staphylococcus aureus.

2. Diuresis

Houttuynia cordata also contains quercetin and other effective ingredients, with anti-virus and diuretic effect.

3, anti-inflammatory

Clinical practice proves that houttuynia cordata has good curative effect on upper respiratory tract infection, bronchitis, pneumonia, chronic tracheitis, chronic cervicitis, whooping cough, etc., and also has certain curative effect on acute conjunctivitis and urinary tract infection.

4, enhance immunity

Houttuynia cordata can also enhance the immune function of the body, increase the phagocytic ability of white blood cells, have analgesic, cough, hemostasis, promote tissue regeneration, expand capillaries, increase blood flow and other aspects of the role.

The nutritional value of Houttuynia cordata

Houttuynia cordata mainly contains volatile oil, decanoylacetaldehyde, houttuynia cordata and other components. It has inhibitory and antibacterial effects on various pathogenic bacteria, cocci, influenza virus, leptospira, etc., and can improve human immune regulation function.