(1) Selection of land rectification Artificial cultivation of fritillary should choose warm and moist, rich in water, drainage and irrigation convenient place. The thickness of the soil layer is greater than 30 centimeters, rich in organic matter sandy purple soil and yellow soil planting is preferred, pH value 5.0 ~ 6.5. Where the soil is sticky, or lack of water and drought are not suitable for planting. The previous crop is grass crops, preferably rice, and rotated for more than two years. After the harvest of the previous crop, the land should be prepared, and the soil should be turned over about 30 centimeters deep, so that the soil can be loosened, finely crushed and leveled. Combined with deep turning, every 667 meters of rotting organic fertilizer 2500 ~ 3000 kg, 50 kg of phosphorus and potassium compound fertilizer, avoid using cow dung. Rake the soil, level the ground, pick up debris. Strip sowing, compartment width 140 cm, ditch width 25 ~ 30 cm, ditch depth 25 cm; compartment surface directly placed method of sowing, first not open compartment, to be sown while sowing open compartment. Around the depth of 40 to 50 centimeters of drainage ditch. After the whole ground in case of heavy rain, the soil panel knots, rake again before sowing.

(2) Propagation methods At present, the production of rhizome reproduction is mainly, individual areas in the summer reproduction using cuttings.

① Rootstocks reproduction Selected without breakage, disease spots, insect mouth, buds full and strong, diameter greater than 0.25 cm of brittle, easy to break the fresh seed roots for seed. When sowing, pick and plant, do not need to break. If you can not plant in time, save with wet sand, storage time of no more than 7 days. Can be sown throughout the year, Sichuan more in late September to December sowing. It is recommended that if the production is mainly to harvest the aboveground part of the grass, it is best to sow in late September to early October; to cultivate the seed root or harvest the underground part of the main, can be appropriately delayed sowing to the first half of November. The amount of seed used per 667 meters 200 ~ 250 kg is appropriate.

Open a shallow ditch in the compartment, ditch depth of 5 to 8 cm, row spacing of 20 cm, in the ditch placed seed roots, each ditch parallel to the placement of two rows, continuous placement. Cover the previous ditch with soil from the second ditch, and so on. After sowing, water properly. The field will be fine, leveled, according to the compartment width of 140 cm and ditch width of 30 cm line, planing the surface of the compartment topsoil in the compartment on the side of the ditch, evenly placed in the surface of the compartment, the planing of all the topsoil uniformly back to the seed roots; and then open the ditch, the ditch soil is also uniformly covered in the seed roots. Follow the same operation until the seed is finished. After sowing, use straw or corn stalks to thinly cover the surface of the compartment, in order to achieve the purpose of moisturizing and reducing weeds, straw decay can also provide a certain amount of nutrients. Carried out in the spring, usually set seed corn. It can provide a certain shade environment for the pre-growth period of fishweed, and at the same time improve the land utilization rate and increase economic income. Plant a row of corn on one side of each compartment, corn nest spacing 30 to 40 cm, 1 to 2 plants per nest.

② cuttings summer hot season, select the thick above ground stems cut into small segments for the plug, the length to have 3 ~ 4 sections is appropriate. Insert 2 sections into the prepared open field seedbed, exposing 1 to 2 sections. After insertion, water thoroughly, and shade, the temperature of 25 ~ 30 ℃, relative humidity to maintain above 90% is appropriate. After the plugs rooted and grew new leaves, gradually remove the shade, refining 10 to 15 days, can be transplanted to the field.

(3) field management

① Irrigation Fishweed likes moisture, afraid of drought, planted to water in a timely manner, and keep the soil moist; dry season morning and evening watering, can be used to water or furrow irrigation and other ways of irrigation, where possible, can be used to sprinkler irrigation. Do not irrigate, so as not to avoid soil sclerosis. Pay attention to the rainy season to clear the ditch drainage, to prevent the soil water caused by root rot.

② Weed control Fishweed planting site in the current year is prone to weeds, should be removed in a timely manner, otherwise it will affect the growth of Fishweed and rhizome reproduction. Fishweed is a shallow rooted plant, weeding in its plant rows between the loose soil, should not be too deep. To keep the soil loose during the growing period, to prevent livestock trampling.

③ Fertilizer Fertilizer can be applied 3 times throughout the growing period as appropriate: at the end of March and early April to apply a dilute human and animal manure water to raise seedlings, 2000 kg per 667 meters, plus 3 kg of urea and apply; in mid-May, 2000 kg per 667 meters of denser animal manure, plus 7 kg of urea dissolved in which and apply; after the line is closed, foliar spraying of 0.1% to 0.2% potassium dihydrogen phosphate, 1 time every 7 days, continuously. Every 7 days 1 time, 2 to 3 times in a row, each time to spray about 50 kg of solution.