Understanding the growth habits of Houttuynia cordata Thunb and cultivating Houttuynia cordata with high yield and high quality

Houttuynia cordata Thunb cold, hard taste, antibacterial and antiviral, heat-clearing and detoxification effect, both medicine and food, high efficiency.

Houttuynia cordata Thunb

1. Growth habits and environmental requirements of Houttuynia cordata Thunb. Houttuynia cordata prefer warm and humid climate, avoid drought, underground stem overwintering, underground stem will not freeze to death at-10: 0 ℃, underground stem can grow and seedling at 12 ℃, 16: 20 ℃ in early growth stage, 20: 25 ℃ in mature period. Houttuynia cordata Thunb likes to be waterlogged and requires soil moisture, with a water holding capacity of 75% to 80%. The soil is slightly sour, pH 6: 7, and the fertile sandy loam and humus loam are the best. Fertilization is mainly nitrogen fertilizer, proper application of phosphorus and potassium fertilizer, in the soil with sufficient organic matter, the underground stem of Houttuynia cordata Thunb grows sturdily.

two。 Choose a land for border. Plots with loose and fertile soil and convenient drainage and irrigation, such as rice fields, ploughing and drying fields in winter, applying 2000-4000 kg of rotten organic fertilizer, 25 kg compound fertilizer, ploughing and leveling, 1.3-1.5 meters wide and 30 centimeters high, the length is determined according to the topography, and the distance between ditches is controlled at 30-40 centimeters, which is planted on the border surface.

3. Plant. Houttuynia cordata Thunb is often propagated by split roots, but it can also be propagated by seeds. It can be planted in spring and autumn, but it is better in spring. The hole or strip planting method can be used to fill the hole or ditch with organic fertilizer and cover it with fine soil 2cm thick. The stem of the disease-free and sturdy fishy grass is cut into a short section of 4cm and 6cm with 2 nodes. The short section of Houttuynia cordata is placed flat in the planting hole or ditch, the plant spacing is 5cm / 8cm, and then covered with soil about 5cm / 6cm thick. If the soil is dry, it can be sprayed with rooting water to keep the soil moist.

4. Fertilize. The fertilizer of Houttuynia cordata Thunb is mainly nitrogen and potassium, and the amount of phosphorus is less, but it can not be lacking. When the unearthed seedlings of Houttuynia cordata Thunb are about 3 cm high, they can be fertilized for the first time, and a mature human feces and urine mixed with 4-5 parts of water and 2% urea can be used to enter the peak period of the growth of Houttuynia cordata Thunb. Fertilizer demand is also relatively increased. On the basis of ensuring adequate nitrogen fertilizer, combined application of phosphorus and potassium fertilizer, especially potassium fertilizer, is particularly important for the formation of the rhizome of Houttuynia cordata Thunb.

Houttuynia cordata Thunb

5. Field management. Strengthen the field management of Houttuynia cordata Thunb, combined with fertilization to weed Houttuynia cordata Thunb, keep the soil moist, timely watering in drought, timely drainage in rainy season, weeding before closure, loosening soil, promoting the combination of control after closure, when the aboveground disciples grow, the tender stems and leaves of Houttuynia cordata should be picked in time; the aboveground stems and leaves turn yellow, the stems and leaves are small, and fertilizer is applied properly to promote growth. If the Houttuynia cordata Thunb is not used as a seed, the buds should be removed in time so as not to consume large nutrients.

6. Pest control. Because of the fishy smell, Houttuynia cordata has few insect pests, and the diseases are white silk disease, leaf spot and so on. Control methods: ① chooses reasonable crop rotation, flood and drought rotation is better; ② chooses loose and fertile soil with convenient drainage and irrigation; ③ strictly selects seeds and removes diseased stems. ④ should strengthen field management, timely drainage in rainy season, and pay attention to irrigation in drought. Topurazine, chlorothalonil and mancozeb were selected to spray or irrigate roots in the early stage of ⑤.

7. Annual harvesting and eating. The tender stems and leaves of Houttuynia cordata were picked in spring and summer, and the underground stems were excavated in autumn and winter. The cultivated Houttuynia cordata Thunb can harvest tender stems and leaves for 2 or 3 times. Houttuynia cordata Thunb can be irrigated with diluted human feces and urine or biogas slurry plus appropriate amount of nitrogen, phosphorus and potassium compound fertilizer one week after harvest. When harvesting the lower stem of fishy grass, part of it is left or decapitated, and when the temperature rises in the next year, it will germinate and emerge, and the management of pulling grass, loosening soil, seedling and topdressing can be carried out in time, which can last for many years.