Late stage sweet potato spray fertilizer can increase yield
Sweet potato is an underground growing crop. In its late growth period, if we reasonably apply fertilizers such as foliar fertilizer to prevent premature plant failure and maintain the ability of leaf assimilation, we can promote the transfer of nutrients to roots, thereby increasing yield and gaining more benefits. The following analysis for everyone.
Foliar spray fertilizer, sweet potato into the late growth stage, the absorption capacity of the root weakened, can be classified as spraying fertilizer. 0.5% urea can be sprayed on weak hilly slopes, plain sands, or fields with premature aging; 0.2% potassium dihydrogen phosphate solution can be sprayed on fields with prosperous vegetation and high fertility levels. 2%～3% of superphosphate leaching solution; 0.4%～0.5% urea and potassium dihydrogen phosphate mixture can be sprayed on the general field, sprayed once every 7-10 days, spray 2～3 times in total Spray fertilizer solution per acre 70 ~ 100 kg, spray time sunny evening is appropriate.
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.
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