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Sweet potato post management technology
The field management of the sweet potato directly determines the growth of sweet potato, so how to manage it later, there are the following points:
1. Put the big fertilizer into place. Expanded fertilizer can play a very good role in the expansion period of sweet potato. The bulk fertilizer can not be over-extended or too small. 15 kg of calcium phosphate per acre, 10 kg of ammonium sulfate, and 0.3% potassium dihydrogen phosphate can be sprayed. And 1% urea solution. 2, the control of the leaf roller moth. The leaf-rolling moth is the biggest enemy of sweet potato, which directly affects the yield of sweet potato. Even the leaf-moth can eat the sweet potato leaves. When the larvae have not rolled the leaves before the 3rd instar, spray 32% of the sputum emulsifiable concentrate 3200 times for prevention and treatment. Spray once every three to five days.
3. It is strictly forbidden to turn over. After the sweet potato is sealed, it is forbidden to turn over the vines, because the vines not only damage the leaves, but also affect the photosynthesis of the leaves, reduce the accumulation of nutrients, and also cause damage to the stems and affect the weight gain of the potato pieces. Therefore, it is forbidden to expand the potato pieces in production. The period is over.
4, drought resistance and drainage. In the late growth stage of sweet potato, if there is autumn drought, it will cause obstacles to the weight gain of potato tubers. Watering should be carried out in time to ensure the development of potato tubers. However, it is necessary to stop watering in the first half of the harvest. If there is more rainfall, it should pay attention to dredge the drainage system to prevent the water content of the potato block from being too high, which will affect the quality and safe storage of the potato.
5. Harvest at the right time. The roots of sweet potato have no obvious maturity. When the average temperature drops to 15 °C, the roots stop expanding, which is timely for harvesting and should not be lower than 12 °C at the latest. Too late will cause the roots to suffer from cold damage and reduce the quality and storage capacity of sweet potatoes. Generally, it is appropriate to collect and dig in late October, and the seed potato must be harvested from 10 days to 15 days before the frost.
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