1. Select and breed good varieties and fertilize them at the right time. When harvesting and digging, select strong plants with straight roots as seedlings and transplant them in the seed field with a row spacing of 30 cm and a plant spacing of 20 cm. Before transplanting, apply sufficient base fertilizer, mainly decomposed farmyard manure. 2,000 kilograms of manure and 50 kilograms of phosphate fertilizer can be applied per acre. After the seedlings emerge in the following year, the soil will be loosened and weeded, and human and animal manure water will be applied once, with 1,000 kilograms per mu as top dressing. When flowering, apply an appropriate amount of phosphorus and potassium fertilizer to make the seeds fuller. Water in time during drought.

2. Plant densely and reasonably and implement crop rotation. Choose sandy land with a certain slope and deep soil for planting. Before land preparation, 2,000 kilograms of decomposed farmyard manure should be applied, and then the land should be plowed to a depth of more than 25 centimeters, and then leveled and harrowed to make a 1.5-meter-wide border. When planting, the density should be appropriately increased, and it is appropriate to plant 6 plants in one row. The grown leaves can all cover the ground. In this way, rainwater can be sheltered during heavy rains, and rainwater can also be stored in the underground soil to prevent drought and moisturize. The rotation of isatis root with mung beans and miscellaneous beans can reduce the occurrence of diseases and increase yields.

3. Sow seeds in rows and apply fertilizer. Before sowing, soak the seeds in a new high-fat film of warm water at 30°C to 40°C for 4 to 5 hours, then take them out and dry them until they are not sticky to your hands, then you can sow them. It can repel underground pests and diseases, isolate virus infection, does not affect the germination and swell function, strengthens respiratory intensity, and improves seed germination rate. In order to facilitate management, the drill sowing method should be adopted. The spot sowing method is also better. It can not only save seeds, but also save a lot of time in thinning out seedlings. The method is: 3 to 4 rows are planted on the border with a row spacing of about 20 cm. cm shallow ditch, and then sow the seeds on demand at a distance of 15 cm between plants, with 3 to 4 seeds per bunch. Combined with sowing, apply compound granular fertilizer mixed with soil, press it slightly to make the seeds, soil, and fertilizer closely combine, and then cover with a layer of fine soil. Generally, it is appropriate to use 5 kilograms of nitrogen, phosphorus, and potassium compound fertilizer per acre. Applying seed fertilizer can save 50% of top dressing, and once the radicle grows and forms a true root, there will be sufficient nutrients, which can form strong seedlings early and lay the foundation for increasing production.

4. Plant seedlings on time and evenly sparsely and densely. The seedlings will generally emerge within 7 to 10 days after sowing. After 3 to 4 true leaves grow, if there is no rainfall, water the plant with dilute urine once during drought. Seedlings should be planted when they grow to 10 centimeters in height. Leave 2 to 3 strong seedlings in each bunch. If there are any missing seedlings, transplant 2 to 3 seedlings nearby to make up for them. Keep them dense and even, with 18,000 to 20,000 seedlings per acre. A high yield of seedlings can be achieved. After the seedlings are transplanted, spraying a new high-fat film can effectively prevent the water on the ground from evaporating and the water from the seedling body from transpiration, isolate pests and diseases, shorten the seedling slowing period, quickly adapt to the new environment, and grow healthily.

5. Topdress in time and cut leaves appropriately. When the seedlings are 10 centimeters high, combine with seedling weeding and topdressing with phlegm urine water fertilizer once, 1,000 kilograms per acre. Land with a large slope that cannot be irrigated can be topdressed with phlegm urine water fertilizer twice more. In order to make the rows ventilated, the leaves are generally cut 3 to 4 months after sowing when the plants are growing vigorously. Harvest twice in plain areas and once in mountainous areas. Topdress once immediately after cutting to promote the growth of leaves and roots. The root yield of cutting leaves once in mountainous areas is 20% to 30% more than cutting twice. In order to ensure that nutrients can meet the physiological needs of root development, you can add 1 capsule of the medicinal Gendaling capsule per 100 kilograms of liquid, stir and dissolve, then spray on the leaves to thicken the underground nutrient transport conduits, increase the nutrient transport volume, and improve The nutrient conversion rate and soil loosening ability make the rhizomes expand rapidly and the content of effective substances is greatly increased, achieving the desire to increase production and harvest.

6. Prescribe the right medicine to prevent and control diseases and pests. The main diseases of isatis root are downy mildew and powdery mildew, which can be comprehensively controlled. The method is: (1) Soak the seeds with 50% carbendazim new high-fat film for 4 to 6 hours for disinfection before sowing; (2) In the early stage of the disease, use 1: Spray 500 times of the aqueous solution of zinc or thiophanate methyl on the leaves, once every 5 days, and spray 3 times in a row to achieve good therapeutic effects. The main pests include aphids, cabbage caterpillars, etc. Use 500 times liquid dimethoate to spray them once every 3 days for 3 consecutive times to eliminate them. At the same time, combined with the spraying of the new high-lipid film, the utilization rate of the active ingredients of the agent is enhanced.