After the end of August, it is the critical period for the summer sweet potato to enter the expansion. At this time, management should be strengthened. On the one hand, it is necessary to maximize the nutrients required for the expansion of the tuber, and on the other hand, it is necessary to prevent premature aging of stems and leaves, enhance photosynthesis, and increase nutrient accumulation. Specific stimulation techniques are as follows:
1, picking the top heart picking the heart can regulate the operation of nutrients, promote nutrient delivery to the roots. Picking the top of the heart for a total of two times. The first time the fries are 30 to 40 centimeters in length, remove the l~2 centimeter long head. When the second branch grows to 30 centimeters, remove it again. Branches are tender and sharp.
2. Pruning branches are more prosperous potato fields. Branches can be cut by scissors to remove 2 or 3 branches. This will allow nutrients to flow back, allowing the tubers to get more nutrients, and at the same time improve the transparency of the potato branches and potatoes. Situation, speed up photosynthesis and so on. However, poor soil should not be topping.
3, increase potash fertilizer
After the yam has been sealed and ridged in August, potassium dihydrogen sulfate solution can be sprayed, that is, potassium dihydrogen sulfate can be formulated into 1-2% of water, spraying 50-70 kilograms per acre, spraying once every 5-7 days. , Even spray 2 or 3 times, on the lack of base fertilizer, thin stems and leaves, or later de-fertilizer field, using a mixture of 0.3% potassium dihydrogen phosphate solution plus 0.5% urea fertilizer solution spray 50 ~ 70 kg, spray once every 5 to 7 days, and spray 2 or 3 times.
4. The vines in the potato field where the growth is excessively prosperous can be prevented by vines. After the ridges of sweet potato are overgrown, they can be gently put back into the original place after they have been picked up. The time for raising vines should be grasped before the end of August, and a total of 2 or 3 vines are recommended.
5, topdressing crack cracking fertilizer cracking fertilizer time, generally 70-80 days after planting, potato block into the peak of the expansion, when the crack surface occurs. Specific should be based on the growth of summer sweet potato and soil conditions. For example, the field with insufficient fertilizer, thin soil, and poor plant growth can be applied as early as possible; the amount of topdressing fertilizer per acre can be 800 to 1,000 kg of human and animal manure water, or 6 to 7 kg of urea can be used for water. 600 kilograms, Shun crack application. If there is sufficient fertilizer in the early stage and the plant grows vigorously, you can use less fertilizer or potassium fertilizer and no nitrogen fertilizer.
1, picking the top heart picking the heart can regulate the operation of nutrients, promote nutrient delivery to the roots. Picking the top of the heart for a total of two times. The first time the fries are 30 to 40 centimeters in length, remove the l~2 centimeter long head. When the second branch grows to 30 centimeters, remove it again. Branches are tender and sharp.
2. Pruning branches are more prosperous potato fields. Branches can be cut by scissors to remove 2 or 3 branches. This will allow nutrients to flow back, allowing the tubers to get more nutrients, and at the same time improve the transparency of the potato branches and potatoes. Situation, speed up photosynthesis and so on. However, poor soil should not be topping.
3, increase potash fertilizer
After the yam has been sealed and ridged in August, potassium dihydrogen sulfate solution can be sprayed, that is, potassium dihydrogen sulfate can be formulated into 1-2% of water, spraying 50-70 kilograms per acre, spraying once every 5-7 days. , Even spray 2 or 3 times, on the lack of base fertilizer, thin stems and leaves, or later de-fertilizer field, using a mixture of 0.3% potassium dihydrogen phosphate solution plus 0.5% urea fertilizer solution spray 50 ~ 70 kg, spray once every 5 to 7 days, and spray 2 or 3 times.
4. The vines in the potato field where the growth is excessively prosperous can be prevented by vines. After the ridges of sweet potato are overgrown, they can be gently put back into the original place after they have been picked up. The time for raising vines should be grasped before the end of August, and a total of 2 or 3 vines are recommended.
5, topdressing crack cracking fertilizer cracking fertilizer time, generally 70-80 days after planting, potato block into the peak of the expansion, when the crack surface occurs. Specific should be based on the growth of summer sweet potato and soil conditions. For example, the field with insufficient fertilizer, thin soil, and poor plant growth can be applied as early as possible; the amount of topdressing fertilizer per acre can be 800 to 1,000 kg of human and animal manure water, or 6 to 7 kg of urea can be used for water. 600 kilograms, Shun crack application. If there is sufficient fertilizer in the early stage and the plant grows vigorously, you can use less fertilizer or potassium fertilizer and no nitrogen fertilizer.
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