It is the key to the late planting of sweet potato. Reasonable fertilization can prevent premature plant failure, maintain the assimilation ability of the leaves, and promote nutrient transfer to roots, thereby increasing yield. China Agricultural Technology Network will introduce how to fertilize sweet potatoes for your reference.
After the foliar sprayed sweet potato enters the late growth stage, the absorption ability of the root system is weakened, and the foliar spray fertilizer can be categorized. There are mainly the following situations:
1. 0.4%～0.5% urea and potassium dihydrogen phosphate mixture can be sprayed on the general field, sprayed once every 7-10 days, sprayed 2 or 3 times, spray fertilizer solution per acre 70 times ~ 100 kg, spray time is appropriate for sunny evenings.
2. For fields with prosperous growth and high levels of fertility, 0.2% potassium dihydrogen phosphate solution or 2% to 3% calcium superphosphate leachate can be sprayed.
3. 0.5% urea can be sprayed on weak hilly slopes, plain sands, or fields with premature aging.
Fertilizer irrigation with 3% ~ 5% of potassium sulfate solution or 10% ~ 20% of the leaching liquid ash ridge irrigation into the seam, 100 ~ 150 kg per acre with fertilizer. For a field with premature aging, a 2% ternary fertilizer solution can be used.
Through the above fertilization methods, appropriate methods are adopted for different growth conditions of sweet potatoes, so that the yield of sweet potatoes can be improved. Did you learn?
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