Mini sweet potato is an exquisite edible sweet potato with small individual, beautiful appearance, excellent quality and less crude fiber. It is currently popular in the market. Early planting, early harvesting, and reasonable close planting are important measures for mini sweet potato to increase the commodity rate and raise the morning market.
First, timely seeding
Use the greenhouse, small bow shed, brewing hotbed, etc. to sow early, and emerge early. The sowing time is usually in mid-March. If you use a greenhouse or a hotbed, you can get it early in late February.
1. Choose the land. Should choose leeward sunny, convenient drainage, medium and above fertility land, must not seed on low-lying or drought-prone land to avoid the emergence of rotten potatoes, late or rare emergence.
2. Land consolidation. After the land was ploughed, the raft was widened by 1.4 meters and the width of the gully was 20 centimeters. The depth of the glutinous surface was about 1.2 meters and the depth was 10 centimeters. The sides of the raft were left 10 centimeters to be buried. If using a hot-heated hotbed, the surface of the kneading surface should be dug down to a depth of 25 cm. First, a 10 cm thick column of manure and straw mixture should be buried, and water should be poured through it, and then the soil should be covered with more than 5 cm (not to cover the soil too thin, causing roasted potato and rotten potato). To be buried in the potato.
3, spread the potato cover soil. 20-30 kg per mu, 5-10 kg of seed potatoes per square meter, spread the potato on the clams, the seed potatoes can be laid flat, or they can be laid (10 cm per row), then cover the soil 3-5 cm, cover the soil The clods should be fine, not thick and large, so as not to expose the seed potatoes. If the soil is relatively dry, the bottom water should be poured first after the potato is spread, and then the soil is watered.
4, film cover film. First, lay a layer of mulch on the kneading surface to keep the water warm, then insert the bamboo arch frame at an interval of 80 cm, cover the film, and compact it with soil. Drainage channels are opened around the seedbed to prevent flooding of the rainy season seedbed.
5, seedbed management. Observe frequently, pay attention to the soil of the seedbed can not be dried, watering immediately when dry, otherwise it will affect the emergence of seedlings. Generally, 25-40 days after sowing, the seedlings are emerged. When the emergence of the seedlings is more than 50%, the mulch of the sputum is removed and the membrane is kept warm. Pay attention to watering and fertilizing. When the seedlings are neat, use 0.2% urea water or light manure to pour the seedlings to promote the seedlings.
6, cut the seedlings cutting. 10-15 days after emergence, when the seedlings are 25 cm long, the seedlings are cut and the seedlings are planted. After the seedlings are cut, the plants are watered and fertilized to promote the seedlings. After about 5-10 days, the second batch of seedlings can be cut, and the whole seedlings can be cut 4-8 times. The first batch of the second batch of seedlings can be planted in the field or planted in the seedbed. After 40-50 days of artificial planting, the seedlings are planted with a density of 20 cm X 20 cm, covered with plastic film or small bow shed.
Second, the field planting management
Field planting time is generally from late April to mid-June, and it is best to use mulch film cover in early April to early May to harvest early. Large batches should be planted with early, medium and late reasonable mixes to lengthen the sales season.
1. Land selection. Sweet potatoes can be grown in general soil, but it is better to choose loam with smooth drainage, looser and less sand.
2, ploughing ridges. After the land is tilled and ploughed, the ridges are 80 cm apart, and the required width is 20 cm. The ridge height is more than 30 cm. The ridges are turtle-shaped and the ridges are flat and flat.
3. Apply enough base fertilizer. Generally medium fertility land, 20 kg of imported compound fertilizer (15-15-15) per mu, or 20 kg of potash fertilizer, 30 kg of phosphate fertilizer, 15 kg of urea as base fertilizer, and more underground pests. The base fertilizer can be mixed into each acre. Kilogram "ground insect light" to control underground pests, base fertilizer applied to the ridge in the ridge.
4. Weeding before planting. 7-10 days before planting, weeding with glyphosate + Wones spray, glyphosate eliminates post-emergence weeds, and Wones inhibits post-emergence weeds. Spray should be applied when the soil is wet. Soil drying will affect the medicine. effect.
5. Reasonable close planting. The required line spacing is 80 cm, the plant spacing is 20-22 cm, and 4000-4500 plants per acre are inserted. When the soil is selected to be wet or rainy, it is required to insert the seedlings into the soil at more than 2 nodes. Use the knife to shoot the soil around the seedlings. When the weather is hot and dry, you should immediately water the live seedlings and check them within 3-7 days after planting. Miao fills the gap.
6. Cover the mulch film. It is best to cover the ground film from late April to early May. The soil is damp, and the film is covered immediately after planting. The soil is dry and the film is covered when the soil is wet after the rain, and the periphery of the film is compacted with soil. When the temperature is below 25oC, the seedlings can be exposed to the seedlings for 3-5 days. At this time, the seedlings are basically alive. After the film is exposed, the soil is sealed with fine soil.
7. Field management. Look at the seedlings and topdressing. After the general seeding, the fertilizer should be topdressed once in a month. Use 2-5 kilograms of urea per acre to water the roots; timely weeding, not grass shortage; pay attention to the damage of the stem-leaf to the stems and leaves, timely prevention and control.
Third, timely harvest
Mini sweet potato commercial potato requirements: individual 50-180 grams, no worms, no disease spots, no damage, no deformity. Therefore, according to the characteristics of the variety, timely harvest, control the size of the potato, and increase the rate of goods. The following are the suitable harvesting seasons for each variety.
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