What are the cultivation techniques of sweet potato seedlings? How many plants can be planted on one mu of land?

Sweet potato is rich in nutrition and has the reputation of "longevity food". Long-term consumption is very beneficial to the human body, and the market price has gradually increased in recent years. What are the cultivation techniques of sweet potato seedlings? How many plants can be planted on one mu of land?

How many sweet potato seedlings are planted in one or one mu of land?

Generally, the density of spring potato and summer potato is 3000,3300 plants / mu and 3300 plants / mu respectively in the north, and the density of autumn potato and winter potato is relatively higher in the south, which is 4000000 plants / mu in a large area.

At the same time, the planting density of sweet potato should be determined according to variety, soil fertility, fertilization level and planting mode. The planting density of short vine is about 6000 plants per mu, while that of long vine is sparse. The farming group suggests that the distance between sweet potato plants should be about 33 cm.

Second, what are the cultivation techniques of sweet potato seedlings?

1. Soil preparation and fertilization

Deep ploughing before winter or early spring, film-mulched sweet potato growth period is not suitable for topdressing, coupled with film-mulching cultivation due to high temperature, high humidity, fast decomposition and utilization of nutrients, easy to lose fertilizer.

Therefore, the base fertilizer should be fully applied at once, generally applying 45000-60000 kg of high-quality farm manure, 600kg of ammonium bicarbonate, 450kg of superphosphate and 225kg of potassium sulfate per hectare. Then pick up the crop stubble on the ridge, break the dough and flatten the dough.

2. Timely and early planting

In order to give full play to the role of plastic film mulching, the effect of plastic film mulching at low temperature in early spring should be effectively utilized to achieve timely and early planting. It is advisable for seedlings not to be harmed by late frost, generally 5-7 days earlier than open field cultivation.

3. Reasonable close planting

General ridge distance 70-80 cm, height 20-30 cm, ridge width 50-60 cm, plant spacing 18-22 cm, 60000-67500 plants per hectare.

4. Planting seedlings with plastic film

After ridging, remove the bumps, make the ridge surface fine and smooth, and then plant. Before planting and covering the film, it is best to spray herbicides on the ridge surface. Cut a T-shaped mouth in the upper part of the seedling, you can use your fingers to hook out the seedling, the seedling is exposed outside the film, and the base of the seedling is sealed with soil. It should be checked frequently and found that the film is blown up by the wind or the surface of the film is damaged. It should be used for sealing in time.

5. Field management

The premature senescence of sweet potato covered with plastic film is an important factor affecting the yield, especially the drought and lack of fertilizer often make the leaves withered and yellow and hinder the growth. Therefore, there is a smooth ridge and furrow to gently irrigate small water during drought, and it should be eliminated in time in case of waterlogging, and for the early decaying fields with yellowing leaves, 1% UV 2% urea solution, or 3% UV 5% superphosphate solution, or 20% potassium sulfate solution should be sprayed on the leaf surface in time, and then, according to the appearance, it should be sprayed again every half a month, preferably at 4-6 p.m.

Warm reminder: varieties should be selected according to different uses and local cultivation conditions, virus-free potato seedlings come from organic agricultural system, the quality should meet the standard. According to different uses, varieties with high yield, high starch, neat and beautiful potato pieces were selected, such as Xushu 18, Ningshu No. 1, Qinshu No. 4, Meiying No. 1 and Qinxiu.