Planting and Management techniques of Chinese Herbal Medicine Radix Astragali

Astragalus membranaceus is a perennial herb whose root is used as medicine. Over the years, 667 square meters produce 400 murmur500 kilograms. It is a crop with high economic value. It belongs to the genus Astragalus Leguminosae, also known as Astragalus membranaceus and Astragalus membranaceus. The height of the plant is about 40ml / 70cm. The leaves are pinnately compound, alternate leaflets elliptic or oblong, racemes, arising from the tip of stems and branches, Corolla dish-shaped, yellowish. The pod is semicircular, yellowish brown, the tip is woody and is not easy to break. The adaptability of Radix Astragali is very strong, the general soil can be planted, drought-resistant, cold-resistant, can survive the winter in the field, but afraid of stagnant water, avoid continuous cropping.

(1) cultivation techniques

1. Select suitable neutral or slightly alkaline sandy soil or surface sandy soil for land preparation. When ploughing, it is necessary to deep plough 30 murmurs of 40cm, apply circle fertilizer 4000 kg per 667m2, diammonium phosphate 25kg or phosphate fertilizer 50kg, conditional available cake fertilizer 50kg, turn the fertilizer into the soil, rake flat and open ditches to send water, make the soil firm, dry a little and then level it, ready to sow.

2. The method of accelerating germination with boiling water was used before sowing. That is, put the seed in boiling water, stir for one minute, immediately add cold water to adjust the water temperature to 40, soak for two hours, pour out the water, cover it with a wet cloth, and soak for 12 hours. When the seed expands or the outer skin breaks, you can sow.

3. Sowing (1) sowing date. Spring sowing is from the Spring Equinox to Ching Ming Festival, summer sowing is before and after the Summer Solstice, and autumn sowing does not emerge in that year.

(2) seeding rate. 1.5-2 kg per 667 square meters. (3) sowing depth. According to the row spacing of 22 cm, open a shallow trench 3 cm deep, sow the seeds in the ditch, cover the soil and suppress it slightly.

4. Field management after sowing, before seedling emergence, the day is not dry, the border is humid, and generally there is no need to water. When the seedlings have 5 leaves, the seedlings are carried out. When the height of the seedlings is 10 cm, the seedlings are determined according to the distance between the plants. Depending on the soil fertility, the planting density should be controlled at 667 square meters and 25-35,000 square meters. After the seedlings are generally not watered, keep the ground a little dry, the soil is loose, in order to facilitate the root growth downward. Watering three times in May, June and September every year, topdressing is carried out according to soil fertility. If the soil is barren and the base fertilizer is insufficient, the time of topdressing is two times at seedling stage and early flowering stage. If the soil fertility is high and the base fertilizer is sufficient, topdressing can be done at the early flowering stage. The total topdressing amount of urea is 15 kg, and the fermented cake fertilizer is 50 kg.

(2) Prevention and control of diseases, pests and weeds

1. Powdery mildew 6 May-August powdery mildew can be prevented by spraying 800 times of fungicides such as 20% Fenruoning powder, 20% Gaozhigao, 70% methyl topiramate, 70% mancozeb and other fungicides. 7 Murray once every 10 days, spray 2 Murray 3 times in a row.

2. Red root disease occurs during the whole growth period, 55% dimethopone can be used to irrigate the root, Eurasian anti-Kuba, 32% gram bacteria, 25.9% purple light 007 and other fungicides 500 Mel 800 times liquid spray to prevent and cure the disease, and 7 Mustang 10 days to prevent and control 2 Mueller 3 times.

3. Bean pod borer and cotton bollworm can be sprayed with 0.2% Awei Chong Qing emulsion 40% Ruitian 1, 25% Kefeng Insecticidal Star, 20% Insecticidal King and other insecticides 1000 Mel 1500 times.

4. Weeds control weeds at seedling stage, 48% trifluralin EC can be used, 0.1 kg per 667 square meters, and 30 kg of water can be sprayed to control Gramineae weeds.

(3) harvesting and processing

1. Collect the seeds in summer and autumn when the pods mature and droop, and the seeds are harvested when the seeds become brown, or else the seeds are scattered on the ground, and after the pods are collected, they are dried and threshed, removed impurities, worm-eaten grains, and stored in jars or cloth pockets, not in plastic bags so as not to affect the germination rate.

2. Root processing and planting 2 from Cold Dew to Frosts Descent three years later, when the stems and leaves on the ground withered, the roots were carefully dug out, shaken off the soil, dried, and bundled into small handfuls of medicine.