Key Cultivation Techniques and Field Management Methods for Rehmannia

Rehmannia has strong adaptability, and the planting site can be chosen in multiple ways; just maintain sufficient sunlight. You can select soil with good drainage and rotate it with crops such as sorghum and vegetables. Fertilization should mainly be phosphorus and potassium fertilizer, and water moderately according to growth conditions. Promptly pull out weeds in the field, and use reasonable pesticide control for pests and diseases.

Planting Rehmannia

1. Land selection and preparation

Rehmannia is suitable for planting in loose and fertile soil. If the soil is heavy in clay or relatively hard, it will affect the growth of its tuberous roots and reduce yield. If the soil drainage is poor, it is very prone to waterlogging, which will cause the tuberous roots to rot. In addition, continuous cropping should be avoided; it is best to rotate with crops such as sorghum, vegetables, and cotton for 3-4 years.

2. Seed selection and planting

After selecting the seeds, break them into small sections about 5cm in size and air-dry them for 1-2 hours so the wounds heal before sowing. When sowing, plant at a reasonable density, generally using about 100 kg of seed per mu. After sowing, cover with 5-7cm of soil and water. In low-temperature areas, ground temperature can be raised by covering the ground. As long as temperature and moisture are suitable, seedlings generally emerge in 25-30 days.

3. Fertilizer and water management

When fertilizing Rehmannia, apply more phosphorus and potassium fertilizer. In addition, applying sufficient base fertilizer is also extremely important for yield. After the seedlings are uniform, in order to make the seedlings grow quickly, topdress while watering. At this time, apply 15 kg of urea per mu, which can be dissolved in water and applied as a drench. By the middle stage of growth, that is, in July, topdress 10-20 kg of phosphorus fertilizer per mu.

4. Field management

When the seedlings grow to more than 10cm, thin them in time, leaving one plant per hole. If plants are missing, replant them. Replanting should be done on cloudy days, and it is best to transplant with soil. In the early stage of plant growth, the seedlings are too small and the root system is relatively shallow. At this time, weed to avoid affecting seedling growth.