Starch sweet potato cultivation points

Starch sweet potato cultivation points First, the selection of seedbed ventilation and sunny, loose land, not easy to gather water, from the water, power near the seedbed.
Second, breeding Seedlings Breeding seedlings is an important part of the high yield of sweet potatoes, the time is from the end of February to early March (lunar lunar January to early February). There are two kinds of breeding seedlings:
1), using cow dung, manure bottom, spray disinfection with Dixon, the selected species, with carbendazim or thiophanate-methyl seepage, soak 5-10 minutes, picked up and dry, and then use The sterilized tubers were bred. Breeding methods: flat row, row spacing 20 cm, spacing 20 cm, and then covered with fine soil, covering a thickness of 1-2 cm, sufficient water, using acetochlor infiltration dry water spray closure, the grass sealed in the ground In the soil, the mulching film is immediately covered, and then the shed film is applied to cover the double film. The temperature is high, the emergence of seedlings is uniform, and the emergence is rapid.
2) Apply the compound fertilizer to the ridge well, use the enemy to disinfect the soil, start the ditch breeding, use the flat row spacing 20 cm, the plant spacing 20 cm, the fine soil cover thickness 1-2 cm, and apply enough water , Acetochlor was used for spray closure. Immediately cover the plastic film, take the bow and cover the film, double film coverage, high temperature, seedling Qi, seedling fast.
Third, seedbed management
1) After 30-45 days of seedling raising, when the potato seedlings are unearthed, the mulch film shall be promptly peeled off and timely watered. When the temperature rises, the bower membrane will be uncovered at 9 a.m., and when the temperature drops at 5 pm, it must be timely. Cover the film with a shed, and the temperature in the shed should not exceed 35 degrees to prevent the temperature from becoming high and easily burning the seedlings;
2) When the 4-5 leaves are unearthed, remove the bower membrane and carry out hardening. To raise the seedlings in time, use urea to raise the seedlings when it is raining or watering, and use pesticides to control pests and diseases to achieve the growth of the potato seedlings. ;
3) Picking seedlings. When the potato seedlings grow to 6-7 leaves and the length is about 25 cm, the seedlings can be cut and the strong seedlings can be cut (weak seedlings can't, what are weak seedlings? Weak seedlings are potato seedlings which are slender, few or no knots, The seedlings are white, and the survival rate of the weak seedlings is low. Some of them are not sweet potatoes, but the long ones are potato roots, and some of the long potatoes are small and small, which affects the yield.) When cutting the seedlings, leave 1-2 leaf buds at the bottom. After the strong seedlings are cut, timely fertilization (urea) and watering are needed to advance the time for the next batch of cuttings to reach the field effect in advance;
Fourth, the adobe potato field to deep ploughing, hoeing the best, with a good ridge, fertilization ridging, fertilizer per acre 15:15:15 25 kg of fertilizer, 30 kg of phosphate fertilizer, 15 kg of potassium fertilizer or sweet potato fertilizer 1 Package (100 pounds), used to kill underground pests, 2-3 kilograms per mu (carbofuran, chlorate, tebutin sulfur, eggs, green grass clear) and so on. The enemy was sprayed with water to disinfect the land.
Spring potato ridge, ridge width 75-80 cm, ridge height 35-40 cm, ridge width 20-30 cm; summer potato ridge bottom width 70-75 cm, ridge height 30-35 cm, ridge width 20 - 25 cm.
The other is from Dalong, the bottom width of 100-111 cm, ridge height of 30-35 cm, ridge width 40-50 cm, double row, set the triangle.
After the ridges are well established, the land for planting seedlings is first closed with the dry land herbicide acetochlor or util, and the grass is sealed in the soil, and then the seedlings are planted on a rainy day or after raining. Only planted one line, the spacing of the spring potato is 25-26 cm, summer potato is 24-25 cm, when the seedlings with sweet potato seedlings, potato seedlings require 25 cm long, 6-7 leaf is appropriate, potato seedlings flat, deep into the soil 5 - 6 cm, buried in three quarters, and exposed in three quarters, the number of spring potatoes must be more than 3,500 per mu, and 3,500 to 4,000 trees per mu in summer.
The ridges were planted on a large ridge and double rows were established. The distance between the rows was 26 cm and the potato seedlings were planted flat, with 3500-4000 trees per acre.
V. Early stage of early management. After the potato seedlings are planted for 7 days, they must be checked for seedlings or dead seedlings in a timely manner and timely added. When the potato seedlings grow to 40 days, the cane grows 60-70 centimeters long. (Big-swelling and infiltrating pesticides play the best effect together) to prevent and treat pests and diseases and keep the vine leaves green and blue.
To control grasses. When the grass of the potato field grows out, spray it with GaiSuoGeng or WeiBa, and kill the grass so as to reach the clean and grass-free field.
Sixth, middle and late management
In May-June, when the potato vines are growing, they must be controlled with dilute amines, and once in 7-10 days. After continuous rain, after the weather is clear, Tito will once and Tito will not turn the rattles. Tito Method: Lift the vine first, always mention the root, and put the vine back in its place. Why can't you turn the rat? The vine is put on both sides of the ridge on the ridge, put together easy to hack yellow, photosynthetic sweet potato through the leaves, so that the rapid growth of potato.
In order to prevent and treat diseases and pests, the potato field must be sprayed with pesticides in a timely manner. It must be maintained for 20 days to make the leaves green and green. It is necessary to prevent and treat root rot. Using agricultural streptomycin and Baifuxiao or Anke withering, the sweet potato will be free of pests. It thrives without disease.
In mid-August, sweet potato was used to expand sweet potato prime, and once in early September, sweet potato diammonium sulfate and potassium dihydrogen sulfate were used to increase the content and weight of sweet potato starch. Scientific management was used to increase the quality and yield of sweet potato.
(Zhu Liqing, Service Center, Dangyang Agricultural 110, Hubei Province)

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