How to grow sweet potatoes, how to grow sweet potatoes Sweet potato planting methods

1. Land preparation and fertilization: land preparation should be carried out on sunny days, and the soil should be broken and fine. After leveling, the fertilizer strip is applied to the bottom of the ridge, the ridge spacing is 80 cm, and the ridge height is about 20 cm.

Fertilizer can use special organic compound fertilizer, when the planting area is large, it is required to measure soil N, P, K and organic matter, and the soil pH value should be measured in the south. The use of ordinary compound fertilizers is not recommended.

2. Pruning and topping: For potato fields with more branches and more vigorous growth, two or three branches can be cut off with scissors, so that the nutrients can flow back and the potato pieces can get more nutrients. Topping regulates the movement of nutrients and promotes the delivery of nutrients to the roots.

When the seedlings grow to 40-60 cm, the tender tips should be removed, and the tender tips should also be removed when the branches are too vigorous.

3. Timely topdressing: about 15 days after transplanting, the seedling fertilizer is combined with the first tillage to apply 750-1000kg of thin human and animal manure or urea per 667m2. Potato fertilizer is topdressing in the branching tuber stage, which is generally carried out within one month after transplanting in combination with the second tillage, mainly nitrogen fertilizer, combined with phosphorus and potassium fertilizer.

After the stem and leaves are sealed, the growth rate of the root tuber is faster, and the top dressing is applied when cracks appear in the ground. 10kg of top-aurea superphosphate leaching solution per 667m2, 3kg of potassium sulfate mixed with 150-200kg of water to form a nutrient solution, and watering along the seam in the afternoon of a cloudy or sunny day is required to be evenly dressed.

4. Storage: early and medium-maturing varieties will be harvested at the end of August and early September, and late-maturing varieties will be harvested in mid-October. The latest harvest is before the frost.

Rainy harvesting is prohibited. When harvesting, it is necessary to dig, load, transport and unload lightly to prevent the potato peel and potato pieces from being bruised. The storage temperature is required to be 10-15, the relative humidity of the air is 85%-90, and the storage place should be clean and hygienic, and the rodent and poison prevention work should be done.

At the same time, it is necessary to have heat preservation measures to prevent frostbite and squeezing, and pay attention to ventilation and heat dissipation.

Before planting sweet potatoes, the soil should be prepared first, and the soil clods in the land should be broken and ditched before planting. If the seedlings are purchased directly, then prune the roots slightly, then water the soil with some water, plant the treated seedlings in the soil, and cover the roots with the soil. If it is a seed, you need to soak the seeds for 9-13 hours, swell and put them in the germination box, and sow them after germination.

The cultivation method of sweet potatoes is as follows:

First, the selection of good breeds. The effect of increasing the yield of new varieties is particularly significant; After detoxification, the old varieties can increase the yield by more than 50% in the current year, 30% in the second year, and about 10% in the third year, and the detoxification effect basically disappears after that. In order to ensure a high yield of sweet potatoes, every .

Change varieties or detoxify them once every two or three years, buy new varieties or detoxified varieties from agricultural research departments, and try not to buy potato seedlings from the market that do not know the name and characteristics of the variety.

Second, deep ploughing. Choose well-drained, high-lying sandy soils for planting. Sandy soils have higher yields than clayey soils, and the skin is smooth and of better quality.

The ridge spacing in the plain area is generally 80 cm (the row spacing after sweet potato planting is 80 cm), and the dry and thin land in the mountainous area can be appropriately narrower, and the ridge height is 30 cm. Summer sweet potatoes should also be planted first, and then planted, which increases the planting depth and has a greater impact on the yield.

3. Plant strong seedlings early in a timely manner. Under the right conditions, the earlier the planting, the higher the yield. Spring potatoes around April 20, the average daily temperature is stable at 15 o'clock, every morning planting a day, increase the yield, the earlier the summer potatoes, the better, each early planting day, increase the yield by more than 1%.

Spring potatoes should be planted with strong seedlings and high-cut seedlings. Planting method, generally eight processes: ditching (planing), watering, seedling, sprinkling pesticides, sealing, spraying herbicides, peritoneum, and seedling.

Flood irrigation is not recommended for planting spring potatoes, and the ground temperature is low and the soil is compacted, which affects the yield.

Fourth, reasonable dense planting. Reasonable dense planting is the central link to improve yield. The planting density should be determined according to four factors: variety, soil fertility, water and fertilizer conditions, and planting time.

For the same variety, the later it is planted, the density should be greater, the high fertilizer water land should be sparse, the low fertilizer water land should be dense, and the mountain dry land without water irrigation conditions should increase the density by more than 20% compared with the plain high fertilizer water land. In the plain area, there are generally medium and short vine varieties, about 3,000 spring potatoes and about 3,500 summer potatoes per mu.

If you sell sweet potato seedlings, you can plant the seedlings in the soil, and the distance between the two seedlings should not be too close.

1. Select the plot: choose a sandy loam with deep soil layer, good drainage, medium fertility, and strong water and fertility retention.

2. Germination treatment: put the soaked seeds in a 25-28 incubator for germination.

3. Timely sowing: sow l to 2 grains per hole, and cover the soil 2-3 cm after sowing.

4. Field management: topping sweet potatoes when the main vine grows to 18-24 leaves.