Sweet potato soilless cultivation technology breaks the conventional sweet potato cultivation mode. Sweet potatoes can grow in the air. First, they need to cultivate the root system in a nutrient solution, and then supply the plants with sufficient water and nutrients. The advantage of aerial tuberculosis is to avoid the one-time shortcomings of harvesting sweet potatoes and seedlings together. As long as the potato seedlings are retained, continuous harvesting and high-quality and high-yield can be achieved. It is also suitable for root crops such as potatoes and yams.
1. Pruning
In the process of sweet potato seedlings growing into trees, pruning and branching is the key. After the transplanted sweet potato seedlings grow for half a month, new branches will grow, and you need to start hanging the vines. Hang the newly grown tree branches on the net frame with ropes, leave three or four branches at a position about one meter away from the main trunk, and leave branches more than one meter away from the trunk to remove the over-dense branches and thinness. Just remove the branches. Pruning every five days in the summer during the growth process, and every ten days in the winter.
2. Top dressing
After hanging vines, in order to enhance plant disease resistance and promote root growth, it is necessary to supplement trace elements. Pour the potassium dihydrogen sulfate with a concentration of one-thousandth into a watering can, and then spray it evenly on the entire plant, spraying once every half a month.
3. Flowering management
Flowering sweet potatoes is not a good thing, it will compete for nutrients. Under normal circumstances, we will artificially cut flowers to reduce nutrient waste. Because sweet potatoes will only bloom when the light is shortened, it is possible to suppress flowering by supplementing light. Even in summer, when it encounters continuous cloudy days, it needs to increase by about 4 hours a day.
4. Fruiting period management
Different from the conventional sweet potato cultivation technology, the sweet potato tree needs to be compressed in the air. One month after the sweet potato tree is transplanted, the vine can be pressed to set the fruit. The nutrient soil must be prepared first, and the perlite, vermiculite, and grass charcoal ash should be mixed evenly at a ratio of 1:1:1 and then put into the hanging basin. Then choose the sturdy vine, pull the vine down about ten centimeters, remove the leaves, hang the hanging pot on the grid, bury the vine in the nutrient soil about two to three centimeters, and then water it thoroughly. After that, water it every other week to satisfy the growth of potato chunks.
5. Pest control
Since the cultivation of sweet potato trees is carried out in facility conditions, and the sweet potato itself is relatively disease-resistant, disease generally does not occur. When pests occur, biological control and yellow board traps are generally used.
6. Picking
The sweet potatoes can be picked in a month or so, and two people are required to cooperate in the picking. Use scissors to cut along the bottom of the pot. After cutting, gently remove the nutrient soil with your hands. Then cut along the roots of the potato tubers one by one to remove all the fibrous roots. Finally, put the vines that have grown on the potato back on the grid. Just keep growing on it.
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