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Rhubarb planting technology
Rhubarb is a perennial herb of the family Polygonaceae. It is also known as Rhubarb. It is used as a root and root medicine. It has laxative constipation and rupture of the product. It is used to treat constipation such as constipation, gum swelling, sore tongue, and scald embolism. Planting rhubarb should choose alpine meadows, deep soil layers, rich humus, and well-drained sandy loam, which can be rotated with potatoes, vegetables, etc. The seed is good in the current year or the following year, and the germination rate is over 3 years. Rhubarb can be planted in spring and autumn, and it is generally adopted in two ways: direct seeding and seedling transplanting. Before sowing Mushi 3000-4000 kilograms of manure, deep plowing 30-40 centimeters, the whole width of 1.3-1.5 meters of soil. The seedlings were planted at 5,555 cm spacing, with a depth of 3-4 cm, 8-10 seeds per hole, 2-3 cm cover soil, and 1.5-2 kg per mu. Seedlings transplanted by row spacing 9-10 cm ditch uniform sowing, cover soil 2-3 cm, 5 kg per mu, sowing water after sowing to keep the soil moist and remove weeds. When the seedling height 9-10 cm can be transplanted on a rainy day, according to the line spacing 5555 cm dig acupuncture points, 5-6 cm deep, the seedlings will be placed inside the hole, with fine soil cultivation. After the emergence of rhubarb in May-May, it can be combined with earth for the first cultivating and weeding, and the second time in July-August. In the second year of May, we must remove the stems from the rhizomes in time, cover the root part with soil, and step on it to prevent the incision water from rot. Played a vital role. Rhubarb is a fertilizer that should be topped 2-3 times a year after planting. At the end of June of the first year, 2000 kg of manure was applied to Mushi. The second time at the end of August, Mushi applied 15 kg of phosphorus, potash or appropriate amount of ash. The following year, the fertilizer was applied 2 times, and Mushi 5 kg of superphosphate and 10 kg of ammonium sulfate were applied. Rhubarb disease mainly includes ringworm disease, anthrax, downy mildew, and root rot. The main control method is the removal of dead leaves in winter, followed by spraying of 1:2:300 Bordeaux mixture and 40% of Indomethacin wettable powder 300 times. Or 25% Rhizoctonia WP 400-500 times, 50% thiophanate 800 times watered the roots. Rhubarb pests are mainly Spodoptera litura, which can be diluted with 800-fold solution of 90% trichlorfon or diluted with 1000-1200-fold solution of dicamba oil. Rhubarb can be harvested 2-3 years after planting. During the September-October period when the aboveground part withered, dig up the roots and roots, remove the net soil, stems and leaves and small roots, cut into small pieces and string them to hang the room under the shade, or dry it with a slow fire. , bitter and slightly astringent is better. The general yield of fresh root 1000-2000 kilograms, the dry rate of 30%, according to the current market price of mu 1650-3300 yuan (excluding sales of seed income).