Planting and ecological characteristics of Rehmannia glutinosa in spring (growth conditions of Rehmannia glutinosa)

Rehmannia glutinosa, also known as Rehmannia glutinosa, is a perennial herb of

Planting and ecological characteristics of Rehmannia glutinosa in spring (growth conditions of Rehmannia glutinosa)

Rehmannia glutinosa, also known as Rehmannia glutinosa, is a perennial herb of Scrophulariaceae. Cultivated in most parts of China, Wenxian, Boai, Qinyang, Wuzhi and Mengxian have the best quality. The main cultivated varieties are Jinguan, Baiguan, Sweet Potato King, Tetradentate Hair, Little Black Hawk, Jing 1, Jing No.2, Jinhong 16 and so on.

1. Biological characteristics

(1) growth and development. The temperature is 25-28℃, and the rhizome appears 7- 15 days after planting. April-May is the flowering period, May-June is the fruit maturity period, and August 8- 10/October is the rapid root growth period. 10- 165438+ October, the stems and leaves on the ground withered.

(2) Ecological habits. Rehmannia likes mild weather and needs plenty of sunshine. Tuberous roots grow rapidly at 25-28℃. The requirements for soil are not strict. Cold-resistant, like drying, afraid of water accumulation, avoid continuous cropping.

2. Cultivation techniques

(1) land selection and preparation. Sandy loam with abundant sunshine, low groundwater level, loose and fertile soil and good drainage is better. After harvesting before autumn, plough deeply for about 30 cm. In the spring of the following year, 4000-5000 kg of manure was applied to each mu, and 50 kg of calcium superphosphate was added, and then 1 time shallow ploughing was performed, and fine harrow was leveled to make a flat or high furrow with a width of 1. Z meters.

(2) Breeding methods. Rhizome propagation is often used in production.

1) plant the seeds upside down. In the middle and late July, select plots with good growth in spring sowing, dig out part of Rehmannia glutinosa, cut the rhizome into small pieces of 4-5 cm, and replant according to the row spacing of 20 cm and the plant spacing of 10 cm, with about 20,000 seed stems per mu. Dig it out the next spring and plant it separately. Planting in this way has high yield and good quality.

2) Preserve seeds in open winter.

When Rehmannia glutinosa was harvested that year, a part of the growing Rehmannia glutinosa was not dug, and it was wintered in the open field, and then dug out for planting in the next spring.

3) planting. Rehmannia glutinosa was planted in the first half of April, and it was planted from late May to early June. When planting, furrow and level the border according to the row spacing of 30 cm and the plant spacing 15-20 cm, and cover the soil for 3-4 cm after planting. About 40 kilograms of stalks need to be planted per mu.