Seed price and planting method of Rhizoma Corydalis

Rhizoma Corydalis is one of the most commonly used traditional Chinese medicines, also known as Corydalis, etc., which is called "Zhejiang Bawei" with Atractylodes macrocephala, Paeonia lactiflora, Fritillaria and so on. It is produced in Anhui, Zhejiang, Jiangsu, Hubei and other places. It has high cultivation value. Let's take a look at the seed price and planting methods of Yuanhu.

How much is the Yuanhu seed per jin?

The price of Yuanhu seed is about 250.35 yuan per jin, but it varies greatly due to the variety, quality, origin and quantity of seeds. Yuanhu is mainly produced in Anhui, Jiangsu, Zhejiang, Hubei, Henan and other places, there are big leaf Yuanhu and small leaf Yuanhu in production, big leaf Yuanhu is conducive to close planting, the yield is high, while the tuber of small leaf Yuanhu is high, but the yield is slightly low. therefore, a distinction should be made when buying Yuanhu seeds.

Sowing method of Rhizoma Corydalis

1. Soil preparation and fertilization: Yuanhu prefers a warm and humic climate, and it is suitable for sandy loam with good drainage, loose fertility and rich humus. The Autumn Equinox ploughed the land for 3 times and raked the land for 4 times, applied rotten compost or barnyard manure as base manure, leveled and raked finely, and opened a drainage ditch 30 cm wide around.

2. Sowing at the right time: Yuanhu should sow from late September to early October, and the next seed should be sown sooner rather than later. Wide border strips should be used when sowing, seed buds should be raised up, ditching, sowing, fertilizing and covering soil should be carried out in turn. The sowing amount is 800 to 1000 kg / ha.

Planting method of Rhizoma Corydalis

1. Rational fertilization: it takes more than 100 days from planting to emergence of Yuanhu. Wax fertilizer is generally applied before and after the Beginning of Winter, spilling 1000-1500 kg of human urine per mu, or adding 50 kg of calcium phosphate and 40 kg of ammonia water, combined with loosening soil, weeding and clearing ditches to cover the soil.

2. Loosening soil and weeding: before and after Yuanhu Lidong combined with fertilization to remove weeds in shallow soil, weeds were removed in time after emergence, weeds were pulled out in early spring, and even grasslands could not be pulled from April to harvest, so as not to loosen the underground stem nodes and affect the yield.

3. Irrigation and drainage: the cultivation of Yuanhu should be irrigated properly in case of winter drought, and the water should be poured into the border ditch in the evening. The water should not exceed the border surface and be released the next morning. The peak growth period is when the spring rain is continuous, and the humidity in the field is high, which can easily lead to downy mildew, so it is necessary to dredge the ditch and drain in time.

4. Removal of buds: in order to reduce nutrient consumption and promote tuber growth, buds must be removed before flowering. 40% ethephon 1000ppm can be sprayed at the early stage of full flowering. 0.5 ~ 1 ppm triacontanol can increase tuber yield by more than 25%.

5, harvest and processing: Rhizoma Corydalis is generally harvested from April to the middle of May, with a fresh stem yield of 300,000kg per mu. After harvest, the fresh stems are graded into large, medium and small grades, wipe off the epidermis, wash the soil, and boil in 80-90 ℃ water. When the tuber is cut and yellow, it can be removed and dried in the sun.

Pest control of Rhizoma Corydalis

1. Downy mildew: seed with medicine, reasonable close planting, strengthen management, use 72% Kelu wettable powder 800 times liquid, or 40% ethyl phosphorus aluminum wettable powder 250 times 300 times liquid, or 75% chlorothalonil wettable powder 600 times liquid spray at the initial stage of the disease.

2. Sclerotinia sclerotiorum: at the initial stage of the disease, spray 50% promethazol or 50% promethazine or 50% nonglide wettable powder 1000-1500 times, or 70% thiophanate-methyl wettable powder 600 times and 50% carbendazim 500 times.

3. Rust: rust mainly harms stems and leaves. It is easy to occur when the climate is humid in the middle of growth. Phosphorus and potassium fertilizer can be increased in prevention and control, and drainage can be carried out in time in the rainy season. At the initial stage of the disease, 97% sodium rust is sprayed 300 times, once every 7 days, for 2 times.

4. Insect pests: there are land tigers, white filariasis, etc., ground tigers like to eat stems of Corydalis, white filariae like to eat tubers of Corydalis, and if they find that seedling leaves wither, they can gently turn the soil in the morning to catch them, or apply 6% BHC powder to 3 jin per mu during soil preparation.