Xu Changqing, the plant to be said today, is not the "Xu Changqing" in the Legend of the Sword and the Chivalrous Man. In reality, Xu Changqing is a kind of Chinese herbal medicine, which has the effects of phlegm and pain, itching and detoxification, mainly for treating rheumatic pain, low back pain, It has various pains such as pain, abdominal pain, toothache, etc., and its medicinal value is extremely high.
1. Site selection
Xu Changqing has strong growth ability. It can be planted on deep sandy soil with sufficient water source, cool and dampness, normal irrigation and drainage and rich humus. The soil should be applied to the base fertilizer before planting, and the amount of base fertilizer should be kept at 2500 kg/mu. The fertilizer is mainly based on decomposed farmyard manure, and a small amount of superphosphate can be added. After fertilization, the soil was ploughed and turned deep into 30 cm. Finally, the flattening was done and the ditch was dug.
2, seedling transplanting
Choose seeds that are mature enough and full of germination rate for more than two years and plant in March. Seeds are seeded before sowing, and seeds can be evenly mixed with plants such as ash and then sprinkled into the seeding ditch. After sowing, cover the fine soil and cover the straw to improve the moisturizing ability of the soil. It can be emerged in about half a month. After the emergence of the seedlings, take the straw in time, do a good job in the management of seedlings, cultivating and weeding. When the seedlings grow to 10 cm, control the planting density for transplanting, and plant the water after planting.
3. Field management
After emergence, when the seedlings grow to 5 cm, the seedlings are planted, and when the height is 2-3 cm, the seedlings are fixed in time to ensure that each seedling of Xu Changqing has sufficient growth work, and it is found that the seedlings with the same growth should be timely supplemented. At the same time, in the seedling stage, weeding should be carried out in time. The number of weeding in the seedling stage should not be less than 2 times. After the ridge is closed, the herbicide should be stopped and the method of artificial weeding should be used to prevent the growth of Xu Changqing.
4, water and fertilizer management
After the seedlings, the fertilizer should be topdressed once. The fertilizer is mainly available nitrogen fertilizer. Then, in June, the fertilizer is applied again. The fertilizer is mainly compound fertilizer to meet the nutrient demand of Xu Changqing's growth. Diffuse and fertilize as much as possible, and cover the fine soil after fertilization. Promote the growth of underground parts. Drought watering in a timely manner, and water drainage measures should be done in rainy days.
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