The main points of fertilization technology of burdock
Burdock is a genus of the genus Burdock, a two- or three-year-old herb, also known as a vigorous seed, root vegetables. In Shandong and Jiangsu, there is a certain area of ​​planting, mainly Spring sirloin, mainly exported to Japan, is one of the important export vegetables in northern China.
Burdock is a deep-rooted vegetable with strict requirements on soil. It is suitable for the cultivation of sandy soil with deep soil layer, uniform upper and lower soil layers, good drainage and loose and fertile soil.
The burdock needs more fertilizer. Under the condition of 1000 kg of burdock root, about 14 kg of pure nitrogen, 18 kg of phosphorus pentoxide and 9 kg of potassium oxide are needed.
Burdock has a long growing season and requires a large amount of fertilizer. Each mu needs to be fertilized organic fertilizer 2000-3000 kg or Suichang bio-soybean organic fertilizer 400 kg, stable long-acting compound fertilizer 50 kg, potassium dihydrogen phosphate 25 kg, 50% granular potassium sulfate 25 kg as base fertilizer, open Ditch is applied.
The top dressing is generally twice during the entire growth process. After the spring sowing burdock grows 4 true leaves, it enters a vigorous growth stage. At this time, the first top dressing is required, and the ditch can be applied at a distance of about 10 cm from the root, and the stability long-acting high-nitrogen compound fertilizer is applied per acre. Kg, should not be applied too close to the plant, so as not to cause thick roots to cause damage to the roots and reduce the quality; the fleshy roots begin to expand, in order to promote the rapid growth of fleshy roots, the second top dressing. According to the growth trend, generally 25 kg of long-acting high-potassium compound fertilizer and 5 kg of instant potassium sulphate are applied per mu. In order to obtain high-yield and high-quality products, combined with the second top dressing, the leaves are sprayed with 0.5% of a large number of elements of the leaf surface of the leaf god 2 to 3 times.
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