Sweet potato planting method
1, seed selection
Although sweet potato planting seems simple, seed selection is also the basic condition for high yield of sweet potato, and it is also the basic requirement for its rooting and germination. When selecting seeds, we usually choose larger sweet potatoes. The first thing is to observe whether the sweet potato seeds are flawed or where they have been bitten by insects and mice. If not, we will continue to see whether there are many sweet potato buds and whether there is vitality, which is basically enough.
Step 2 sow seeds
When sowing, soaking sweet potato seeds in polyploid solution for ten minutes can effectively prevent some diseases, and at the same time, it can also prevent the seed potatoes from being eaten by mice before germination and then sowing. When sowing, you should distinguish between the head and the tail, otherwise the seedlings will not grow, and if you can't distinguish clearly, you can put them sideways. Finally, cover the seed potato with a layer of rotten wood and a layer of thin soil. If we are afraid that the temperature does not meet the requirements, when the sweet potato seedlings grow to 30-40 cm, we will cut them down and then cut them into a section of three leaves as a cutting section. When cutting, each plant is generally about 30 cm apart.
Step 3 apply fertilizer
After planting, the first fertilization is needed. This kind of fertilization is mainly to make the cuttage sweet potato seedlings grow new roots, so it is generally applied with human excrement and urine. The second fertilization is after the sweet potato survives, so it looks uneven because the growth is different. This time, mainly to protect seedlings, urea is generally used. The third fertilization is seedling fertilizer and urea, but some compound fertilizer should be added. Finally, the most important fruit fertilizer, usually potassium fertilizer.
4. Miao Shun
In order to facilitate the subsequent harvest and make unnecessary branches and leaves consume nutrients, we should arrange the sweet potato seedlings in the field, arrange the sweet potato vines in one direction and let them grow in one direction, so that there will be many aspects when harvesting. Secondly, it is also good to remove some redundant branches and leaves when arranging seedlings.
5. Disease prevention
Leaf rollers, aphids, grubs and voles are generally harmful to the growth of sweet potatoes. Leaf rollers and aphids generally harm sweet potato leaves and affect photosynthesis, while grubs and voles generally prefer to eat sweet potatoes in the field, and they will bite them one by one. Generally, the effect of spraying trichlorfon solution on pests that harm branches and leaves is good, but it has little effect on voles, so trapping is generally adopted, and voles' favorite food is mixed with rodenticide to trap and kill them.
Step 6 harvest
The harvest is usually in September. First, we have to cut off the sweet potato seedlings and dig them out. The dug sweet potatoes generally need to be stored in the cellar, otherwise the water will easily lose and rot.
Sweet potato planting skills
1, select high-yield and marketable varieties for seedling raising (spring sowing) or cutting seedling raising.
2. Planting sweet potato seedlings requires land consolidation first. If it is planted in spring, the land is high, there is no water or good drainage, so try to cover it with plastic film. The soil of the plot should be loose and fertile, and it is appropriate to choose loose sandy loam with good drainage.
3. Proper application of foot manure, farm manure and compound fertilizer. Generally, 4,000 kg of decomposed high-quality farmyard manure, 20 kg of diammonium phosphate, 30 kg of urea and 7 ~ 12 kg of potassium sulfate are applied per mu.
4. Ridge farming is generally planted with two rows of high ridges, with a ridge height of 20-25 cm, a ridge width of 60-80 cm and a ridge spacing of 15-20 cm. The ridge surface is required to be smooth and detailed. Double-row covering is made of polyethylene plastic film with a thickness of 0.006-0.008mm and a width of110cm. There is also single ridge cultivation.
5. Planting seedlings with film mulching: some are planted with film mulching first, and some are planted with film mulching first. Each has its advantages and disadvantages. The former is mostly used for artificial planting, saving labor. The latter can be mechanically covered with plastic film to raise the temperature in advance to ensure picking. The water in the planting hole must be watered enough to avoid drought at seedling stage. After film mulching, the film should be pressed well, and it can be pressed with soil every once in a while. The planting holes of cultivated seedlings should also be sealed with soil to prevent the hot air under the film from leaking out and burning the seedlings. Try to complete many operations such as land preparation, ridging, film mulching and soil covering in a short time. When laminating, strive to achieve "tight, flat and strict" standards.
Nutritional value of sweet potato
1. Every 500g of sweet potato contains protein 1 .5g, sugar14.5g, fat1g, phosphorus100mg, calcium 90mg, iron 2g, carotene and vitamin 0.
2. The vitamin B family in sweet potato is much higher than that in rice. For example, the vitamin B 1 in sweet potato is six times that of rice, and the vitamin B2 is three times that of rice. In particular, sweet potatoes are also rich in lysine, and rice and flour, the staple foods we often eat in our lives, are very lacking in lysine, but many people are not quite sure about this. Lysine cannot be synthesized by itself and needs to be obtained through food. So if you eat sweet potatoes often, you can supplement lysine well.
3. Sweet potato also contains cellulose, the content of which is 10 times that of rice and flour. After we eat it, it can not only help digestion, promote gastrointestinal peristalsis, but also play a certain role in protecting the stomach.
4. Sweet potato is also rich in mucin, which can protect many organs in human body, especially respiratory tract, digestive tract and blood vessels.
5. Sweet potato also contains pectin, which can cooperate with cellulose to promote digestion, protect the stomach and prevent constipation.
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