The cultivation and management of Danpi

Danpi is a commonly used traditional Chinese medicine that uses root peel as medicine. It has the effect of heat and cooling blood and promoting blood circulation. Mainly produced in Sichuan, Anhui, Shandong, Guizhou, Hunan and other places. Dan Pi is a deciduous shrub with medicinal and ornamental features, including white flowers, safflower, and purple flowers. Generally more than 1 meter high, the highest height of 3 meters, stems. Danpi is cold-resistant and likes a cool climate in winter and cool in summer. Danpi drought-resistant stains, requiring adequate light, moderate rainfall, suitable for deep soil, fertile, loose, good permeability, neutral, slightly acidic soil growth. Saline-alkali soil and shaded land cannot be planted, otherwise the yield is not high. After choosing a place, it is best to deepen the sun in the summer. If the weeds are serious, we can use them to weed and weed the grass until it rots. The plots that have been planted in Danshu must be replanted every 3 to 5 years. First, the basic fertilizer for soil preparation. Combined with site preparation, each mus of cooked pig cattle fat, chicken manure, etc. about 5,000 kilograms. The slope soil is made into a wide raft, and the ground is made into a 1.5-meter-wide sorghum. Open drains and prevent waterlogging. Second, choose a good seedlings. Seedling breeding and transplanting methods can be used to propagate seedlings. Seedlings should be transplanted and transplanted for 2 years with healthy pest-free seedlings. Transplanting ramets in the harvest from September-October, selected three years of robust disease-free pests, plants with medium and small roots as seedlings. The roots were harvested for medicinal purposes, leaving medium and small roots, and they were cut with a knife from the root neck. Each plant had 2-3 buds. The fine roots were kept as much as possible, and the diseased branches and dead branches were cut off. Third, timely transplanting. Transplanting and transplanting from the end of September to the middle or late of October should be connected with the time of collecting herbs and the time of taking seedlings. First, make a good point, according to the spacing of 50 cm 40 cm dig a good hole, hole depth 25 cm. Each hole is applied to fertilizers such as farm soil, fly ash and grass ash. With the seedlings planted. Two-year-old seedlings and ramets transplanted, one plant per hole, and one-year-old weak seedlings planted two plants per hole. When planting, pay attention to straighten out the rootstock, planting it firmly, soil compaction, and pouring thin human urine to set the root. Then cover the fine soil, slightly higher than the surface, and finally cover the straw winter. Fourth, do a good job in field management. In the winter and the following year, interplanting one row of vegetables between rows is beneficial to suppressing weeds and fertility. Remove grass every year in April, July and September. In the spring of the second year after the emergence of the bark, weeding was performed, the soil around the roots was removed, the roots were exposed, and the sun was exposed. After 3 to 4 days of drying, soil can promote multiple branches and multiple new roots. Top-dressing compound fertilizer, but do not only topdressing nitrogen fertilizer. After organic fertilizer, cake fertilizer, phosphorus, and potassium fertilizers are mixed and fermented, they are applied in winter. The flower buds were removed before spring flowering in the third to fourth years (except for the remaining fields), so that the nutrients were concentrated for the growth of plants and roots, and the yield was increased. Picking buds should be done on a sunny morning to facilitate wound healing. Every winter in early November, pruning branches and diseased branches are trimmed and yellow leaf leaves are removed and burned. It can reduce the risk of pests and diseases in the coming year and make plants grow robustly. Fifth, do a good job of pest control. Dan Pi should mainly control leaf spot disease, gray mold, white peony disease, and rust disease. The method of controlling pests and diseases of the dandelion is first implemented in rotation. After planting the paeonol, it takes more than three years to replant the bark. In some places, there are no rotations. Severe onset of 2-3 years after planting causes dead seedlings. Second, to control the amount of nitrogen fertilizer. Do not only apply nitrogen fertilizer, more use of ternary compound fertilizer, organic fertilizer, farmyard fertilizer, cake fertilizer, etc., to enhance plant resistance. The third is to clear the drain in time. The fourth is chemical control. The early stage of disease can be controlled by 50% carbendazim 800 times, 50% thiophanate 1000 times, 75% chlorothalonil 600 times, 40% bacillus 500-000 times, 1:1: 100 Bordeaux mixture.