How to cultivate and process Yuzhu
Polygonatum is the dry rhizome of Lilium plant, Polygonatum. Yuzhu sweet, slightly cold, Yangyin Runzao, Shengjinzhike effect, mainly for the treatment of lung and stomach injury, dry cough, throat thirsty, heat and other symptoms. The site preparation site should be selected for leeward sunny, well-drained, fertile soil loose, deep sandy loam soil, bogey in the soil with heavy, thin, low-lying and easy to plot areas of water cultivation. Avoid continuous cropping. Former crops are best legumes. After selecting the land, apply 2500 to 3,000 kg of organic fertilizer per acre as a base fertilizer, spread it evenly on the ground, and then turn the soil deep (about 30cm deep), in addition to net weeds exposed in the hot sun. Cultivation methods Polygonatum przewalskii should be propagated with rhizomes. It is possible to select from the stout stalk plants at the time of harvest to have no hypertrophic roots with no pests, no black spots, no spots, no damage, yellowish-white color, full head buds, and multiple roots. Stems for species use. During the planting period from July to November, a 6 to 15 cm deep groove is formed on the surface of the planter at a spacing of 15 to 30 cm. The rhizome of the plant is cut into small segments of 3 to 7 cm in length. ~ 17 cm arrangement, buds head in the same direction, and then cover the pig manure or soil fertilizer, the amount of 250 to 300 kilograms per acre. After field management, weeds must be cleared of weeds in time. It should not be weeded after rain or when the soil is too wet. The first fertilization is carried out before sprouting in spring to promote the growth of stems and leaves. The second fertilization was carried out during the dormancy of Polygonatum odoratum. The composted pig manure and phosphate fertilizer were applied and covered with soil after being applied. The thickness was 5-7 cm. Polygonatum is most likely to trap water. Before the arrival of the rainy season, it is necessary to clear the ditch for drainage. Pest control Leaf spot disease prevention and control method is: Before the onset or early onset, spray 1:1:120 Bordeaux mixture or 50% dexamethasone 800 times, spraying once every 10 days, continuous spraying 2 or 3 times. Rust should be removed and burned in time after the diseased plant is found, and lime is disinfected in the hole. The rot disease prevention method is: pay attention to drainage to reduce soil moisture. Insect pests are mainly brown beetles, black beetles, red-footed green beetles, etc., which mainly damage the roots. The prevention and control method is: Apply sufficient organic fertilizer as base fertilizer or top dressing, or use rice and wheat bran as bait. Sprinkle it on the cocoon in the evening. When severe pests occur, the roots are poured with 90% trichlorfon 1000 times. Harvesting and processing are generally started in the third year after planting. The south harvests in autumn, and the north harvests in the spring, and it is necessary to prevent breakage during excavation. During processing, rhizomes will be excavated according to the length and length of the classification of drying, do not bag the uncooled Yuzhu, so as not to heat deterioration. After 2 to 3 days of drying, remove fibrous roots and silt, and then rub the rhizome on a slate or a wooden board, until the rough skin is debrided, golden yellow and translucent, and the sugar juice oozes out by hand. Then dry it. There are also processing methods using steaming and kneading, that is, first fresh bamboos are softened and steamed for 10 minutes, then airtight plastic bags are used, hand kneading or bagging is stepped on foot until the bamboo is golden and translucent. Until then, remove the spread. To prevent excessive rubbing during processing, otherwise the color will become darker and affect the quality of the product.