In recent years, the area of ​​sweet potato cultivation in the eastern part of Sichuan is large, especially in the corn field. In order to obtain high yield of sweet potato in corn, it should be noted in cultivation -
Grab the plant at the right time. Early planting of sweet potato in corn field can promote early growth, early potato, early closure of ridges, and extension of potato tubing expansion. Generally, corn sweet potato, from June 10 to June 20, is planted once a day for an average of 3%. Therefore, the sweet potato should be planted early, and strive to be finished in mid-June, so that its growth period can reach more than 120 days. Only in this way can we achieve higher yields.
Beat the potato ridge. Potato ridge is an important factor affecting sweet potato yield. Therefore, we must lay a good potato ridge. It is necessary to avoid ridges after the rain, because the ridges after the rain, the soil is squashed, and the potato chips are not swollen, so grab the sunny days and beat the ridges, and strive to be sturdy, transparent, and short. It can increase soil voids and increase permeability and water retention capacity; short ridges are good for drainage and prevent soil water saturation, which can not only resist drought and flood, but also maintain the permeability of potato ridges.
Apply enough base fertilizer. The growth period of sweet potato in corn field is short, and the application of base fertilizer, especially the application of seedling fertilizer, can promote the rapid growth of stems. Stem fertilizer generally applies 2,500 to 3,000 kilograms of soil per mu, and it is best to apply some quick-acting potash fertilizer such as ash and ash, and apply 10 to 15 kilograms of diammonium phosphate per acre. In order to promote the early development of potato seedlings, some nitrogen fertilizer can be applied at the time of planting the seedlings, generally 3 to 4 kg per mu. Pay attention to seedlings, fertilizer isolation, and finally watering the hole.
Choose the vine head. Sweet potato vine head, developed nutrition, strong resistance, early rooting, early potato, high yield. According to the test, the sweet potato in the corn field was planted with a head, which increased yield by 14.1%. When planting the vine head, keep the top leaves not dry, and do three things: first, with the vines, with the planting, with watering, to prevent the vine leaves from losing water; second, the leaves on the ground should be moderate, if 7 leaves, sunny When planting in the morning, you can leave 3 leaves to bury 4 leaves. On cloudy days, when planting in the afternoon, you can leave 4 leaves to bury 3 leaves, preferably in the afternoon or evening. Third, watering after planting, sealing the points.
Reasonable close planting. The yield of sweet potato in corn field is low. Therefore, it is generally used to plant small ridges in order to exert the effect of increasing the population to obtain high yield. Can choose the varieties of short vines and sweet potatoes, pay attention to reasonable dense planting, planting with small ridges, generally ridge distance 60 ~ 70 cm, plant spacing 15 ~ 20 cm, planting 5000 ~ 6000 plants per acre, seed potatoes can be more dense, Up to 7,000 strains. When planting, the short seedlings are deeply inserted into the oblique planting, pouring enough water, sealing the points, so that they can still be seedling early, early hair, early potato, more potato, high yield.
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