One is to raise the seedlings. 7~10 days after planting, arable land, 20 to 30 tons of human and animal manure water, 10 to 15 kg of ammonium bicarbonate, or 5 kg of urea (preferably 4 to 10 kg of 40% efficient compound fertilizer); 100~150kg of mixed superphosphate 25~30kg is applied in the pond and not in the pond (the bottom fertilizer uses only high-efficient compound fertilizer to raise seedlings with only human and animal manure); when vine leaves are ridged, 21.8% of sulfur is used per mu. Zinc 0.5 kg or compound zinc fertilizer 0.8 kg water 50 kg foliar spray; in early October, acres with 100 grams of potassium dihydrogen phosphate, urea 150 grams, 50 kilograms of water spray on the leaves 2 to 3 times.
The second is the cutting-edge cultivation. When the sweet potato seedlings survived, all the seedlings were removed, which shortened the vines, increased branching, increased green leaves, and improved the plant type, so as to facilitate multi-tuber crops. Note: Do not turn the rattan, let alone "hit the rattan rattan". Take advantage of the fact that you can take care of Fujimoto, cut off the roots, and control leggy.
The third is to prevent flooding. It is necessary to clean the silt at any time to repair ridges and ensure that there is no stagnant water in the furrows.
The fourth is timely harvest. In the middle of November, sweet potatoes are harvested for the purpose of planting, eating, or feeding, vines are used as vegetables, and vine leaf silage is used as feed. Note: Harvesting too early and late will reduce yield, quality and storability. Fresh potatoes may be dug in advance as early as possible.
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