Yam (also known as big potato) is a short-day crop. The edible portion is a yam bean on underground roots and stems. It is rich in nutrition, has a good flavor, and is used both medicinally and food. Yam root is buried 35-60 centimeters in diameter and the stem on the ground is about 3 meters, less polluted. Hi fat afraid of worry, hi temperature cold. Can be planted on fertile sandy land. The area along the Weihe River and the Luan River in our district is planted in large areas, and the output can reach over 2,500 kg. The products have a long shelf life, stable prices, and high economic returns. 1. Propagation Seeds Yam is vegetatively propagated. There are two methods commonly used in production. 1.1 The use of yam bean breeding before the frost to remove large, round, shiny yam bean indoor storage, the following spring breeding, one acre seedbed can be planted 7 acres of field. Take the roots in the autumn for planting. Advantages: low cost, for new planting areas or even land. 1.2 The advantages of using old yam head or roots to reproduce is that this fall can be planed yams. What is in the ointment is that it will be degraded, the output will be reduced year by year, and nematode diseases will occur easily. 2. Cultivation Techniques 2.1 Selecting land, applying sufficient basal fertilization to grow yam in the first year, selecting flat and fertile sandy soil, and applying 3,000 to 5,000 kilograms of high-quality soil-fertilizer to Mushi. Yam beans can be digged about 40 centimeters, species roots to dig 60-80 cm (even for shallow fields) do not disturb the soil. Deep groove sorghum is made, and it is about 30 centimeters wide. After sun drying, it is prepared for broadcast. 2, 2 Seed Insulation In the mid-March, the roots (or cut into 5-8 cm) will be bred with yam beans or planted with 10-15 cm yams, soaked in warm water at 50°C for 10 minutes. After the right ash powder is stored, air for 3-5 days (or 40% methylisophosporide 800-1000 times soaking for 2 days). After the wound heals, select the leeward sunny place and build the seedbed to germinate. The seed blocks are arranged in sequence, one layer of seed is sprinkled with a layer of soil, and a total of 4-6 layers are discharged. Cover the film first, then cover the top film. After about 1 cm of buds are picked up, they are removed and planted in Daejeon. 2, 3 sowing in mid-late April, 5 cm ground temperature stable to about 10 °C, choose sunny sowing. First ditch depth 10-15 cm, spacing by 35 cm, spacing 20 cm, acres planted about 9500, with seeds 250-300 kg; germination of yam beans, spaced 25 cm, spacing 10 cm. Mu 35-40 kilograms of seed, planting 26,000 plants, about 6 centimeters of cover soil after sowing, making sure to keep the earthworms, 50% acetochlor 60-70 ml per mu, spraying after mulching, heat preservation, water conservation, anti-grass, Anti-staining. 2,4 After the emergence of fine yam seedlings, dig holes to draw seedlings out of the membrane. After 20-30 days, use branches or bamboo poles to take the ergonomic stand to guide the vines to the shelves so as to facilitate ventilation. In the rainy season in June, weeds are prone to weeds and must be manually removed and drained in time. Before and after the summer heat, yam flowering stage, drought and watering, Mu recovery "Zhonghe card" 50 kg of biological organic fertilizer. Before the beginning of autumn, 15-20 kilograms of potash fertilizer (or foliar spraying of potassium dihydrogen phosphate) was used to promote the rapid growth of root tuber. In mid-July, full of vines, acres with more than 15% more than 50 grams of water 50 kilograms spray 1-2 times to control the growth of stems and leaves. If there is anthrax, brown spot occurs 70% thiophanate-methyl WP can be 1000 times plus 75% chlorothalonil 1000 times, spraying 2-3 times prevention. 3, before harvesting, planting seed frost, harvesting large grains, round, yam beans with less pores to retain species. Frost fell to the following year before germination. The yams left as seeds need to be stored in the upper and middle december of December, or stored in sand or soil. The room temperature should be controlled at 0°C or higher, and 25% carbendazim should be used after 100% liquid saggers for drying, storage, freezing, and safe wintering.
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