High-yield management points for sweet potato planting
First, deep cultivation and soil change.
Deep ploughing can break the bottom layer of the plough and thicken the soil layer, so that the soil is loose and enhances permeability, which is conducive to water storage and protection, and facilitates the rooting of sweet potato roots, resisting drought and suffocation. The depth of deep ploughing is generally about 25 cm, and the high-yielding field should be about 35 cm deep. Deep tillage should be combined with soil improvement, such as sand mixing in sticky soil, adding mud in sand, improving soil structure, and creating good conditions for root development. The high-yield field of sweet potato ridges increased yield by about 20%.
Second, high ridge dense planting.
Ridge cultivation is an effective measure to increase production. At the same time, high ridge planting is also the key to high yield of sweet potato. The test results show that the ridge distance is about 60~90 cm, the density is 4000~6000, the ridge distance is about 70 cm, and the density is 5000.
Third, scientific formula fertilization.
Fertilization should be based on base fertilizer. The base fertilizer should generally account for 60%~80% of the total fertilizer. The application of base fertilizer must be based on the application of fertilizer, potassium fertilizer and zinc fertilizer. Muping applies 3000 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 should be applied according to the situation, generally more application of lean soil, less fertilizer application. Thereby achieving a virtuous cycle of high investment, high output and high efficiency.
Fourth, with leaves early planting.
Appropriate early planting of sweet potato can prolong the growth period of sweet potato, which is conducive to the development of sweet potato roots, especially early planting tender and strong seedlings, slow seedlings, early potato, high survival rate, and obvious yield increase. When planting the seedlings, do deep planing, watering more, and cover the soil.
Five, fertilizer water filling.
Sweet potato is a potassium-producing crop. During the tuber expansion period, the fertilizer should be used to fill the rhizosphere soil with potassium fertilizer, which meets the needs of potassium in the late sweet potato. Generally, in the end of August, 1% potassium dihydrogen phosphate solution is used for 100-150 kg per mu. For the de-fertilized plot, 100 kg of nitrogen, phosphorus and potassium mixture can be infused and poured along the crack. In the case of persistent dry weather, it is necessary to timely pour the bulge water in a place where conditions are met, but it is not advisable to water the water within 20 days before harvesting to avoid reducing the storability of the roots. In case of autumn, it is necessary to clear the ditch and drain in time to prevent the root rot from causing a reduction in production.
Six, late foliar spray fertilizer.
In the sweet potato expansion period, the foliar fertilizer is sprayed, and the potassium dihydrogen phosphate solution is used for foliar spraying. Another point is that the sweet potato planted this year has not been turned over as in previous years, but has been carried out to prevent the loss of sweet potato nutrition.
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