First, plough the soil.
Deep plowing can break the bottom of the plow, thicken the living soil layer, loosen the soil, enhance the permeability, is conducive to water conservation and conservation, and facilitates the down-rooting of sweet potato roots and resistance to drought and flood. The depth of deep plowing is generally about 25 cm, and high-yield fields should be plowed about 35 cm. Deep ploughing should be combined with the improvement of the soil, such as adding sand to viscous soil, adding mud to sand, and improving the soil structure to create good conditions for root development. The high-yielding field sweet potato ridge yielded about 20% more than the flat crop.
Second, high-density planting.
Ridge cultivation is an effective measure to increase production. At the same time, high-density planting is the key to the high yield of sweet potato. The test results showed that the ridge distance was about 60 to 90 cm, the density was in the range of 4000 to 6000 plants, and the ridge distance was about 70 cm, and the density was the highest among 5000 plants.
Third, scientific formula fertilization.
Fertilizers should be dominated by basal fertilizers, and basal fertilizers generally account for 60% to 80% of total fertilizers. Applying basal fertilizers must be based on multiple application of coarse fertilizers, and sufficient phosphate fertilizer, potash fertilizer, and zinc fertilizer should be applied. Muping applied 3,000 kg of crude fertilizer, 15 kg of potassium sulfate, 25 kg of superphosphate, 1 kg of zinc sulfate, and 25-30 kg of ammonium bicarbonate. Nitrogen fertilizer is applied depending on the situation. Generally, it is applied more thinly and less fertilizer is applied. In order to achieve a high input, high output, high efficiency and a virtuous circle.
Fourth, early planting with leaves.
Suitable early planting of sweet potato can prolong the growth period of sweet potato, and it is good for rooting and emergence of sweet potato roots. In particular, early planting of young and tender seedlings, rapid seedling growth, early potato growth, and high survival rate have obvious effects on yield increase. When the seedlings are planted, they need to be deeply planed, watered, and covered with soil.
V. Fertilizer irrigation.
Sweet potato is a good potassium crop. In the tuber enlargement period, potash-based fertilizer should be used to irrigate the rhizosphere soil to meet the large demand for sweet potato in the later period. Generally in late August with 1% potassium dihydrogen phosphate solution 100 ~ 150 kg per mu. For defertilization plots, 100 kg of NPK can be fed and poured along cracks. In case of continuous dry weather, water should be poured in a timely manner in places where conditions permit, but it should not be watered within 20 days before harvest so as not to reduce the resistance of the roots. In case of Qiuyu, it is necessary to drain the drain in time to prevent the root from rot and cause a decrease in production.
Sixth, later spraying fertilizer.
The spraying of foliar fertilizers is carried out during the expansion of sweet potatoes. The use of potassium dihydrogen phosphate solution for foliar application is sufficient. Another point is that sweet potatoes grown this year have not been picked up as they were in previous years, but they have been raised to prevent the loss of sweet potato nutrition.
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