How to Grow the Medicinal Herb Chinese Yam? Detailed High-Yield Cultivation Techniques

In recent years, Chineseyamhas become highly favored by consumers because of its rich nutrition, high medicinal value, and dual use as both a vegetable and a medicine. Chinese yam generally yields 2500-3000 kg of tubers per mu, with a net income per mu of over [amount] yuan; when the market is good, the output value per mu of high-yield plots can exceed 10,000 yuan, so growing Chinese yam is a way for farmers to increase their income.

I. Land preparation and seed selection.Choose a plot with high terrain, good drainage, and deep sandy loam soil. Loosen the soil and apply fertilizer, and irrigate well to build up bottom moisture. Select the harder upper end of disease-free tubers, the yam tail sections, as seed pieces, and treat the seeds by soaking with New High Lipid Film (which can be mixed with seed dressing agents). This can repel underground pests and diseases, isolate viral infection, strengthen respiration intensity, and increase the seed germination rate.

II. Making beds and planting.Planting can be done when the air temperature remains at 12°C and the soil temperature stabilizes above 10°C. 7-10 days before sowing, cover with a layer of moist sand and then plastic film on top to promote sprouting. Open furrows at 80 cm intervals, with a wide-row spacing of 80 cm and a narrow-row spacing of 30 cm, a planting depth of 3-4.5 cm, and a plant spacing generally of 15-20 cm. Lay the Chinese yam tail sections flat in the furrow in the same direction, then cover with soil level with the bed surface. For those with many sprouts, keep 1-2 strong sprouts and remove all the rest as early as possible.

III. Field management.After the Chinese yam emerges, set up supports promptly to guide the vines. If there are too many side branches, remove the side vines at the base and keep the upper side vines. In the early growth stage, cultivate and weed frequently until the vines reach halfway up the trellis. Apply topdressing once each when the vines reach halfway up the trellis and when they fully cover the trellis, appropriately adding some potassium fertilizer or foliar fertilizer, and at the same time spray New High Lipid Film to improve stress resistance. When the leaves begin to expand, spray Medicinal Root Dalin on the foliage. This causes the products of leaf photosynthesis (nutrients) to be transported to the root system, improves the nutrient conversion rate and soil-loosening capacity, enables the rhizomes to expand rapidly, and greatly increases the medicinal content. Chinese yam is a drought-tolerant crop. To increase yield, under conditions of long drought without rain, water lightly 1-2 times; if there is rainy weather, drain promptly to prevent waterlogging damage.

IV. Pest and disease control.Anthracnose is a disease that frequently occurs in Chinese yam production. Once disease spots are found on the leaf surface, an appropriate amount of mancozeb plus New High Lipid Film can be used for foliar spraying at the early stage, generally once every 7-10 days, and 2-3 times is sufficient. Nematodes are a major pest of Chinese yam. The general control method is to evenly scatter 3 kg of 5% mecarbam granules per mu in the planting furrow.