High-yield and pollution-free optimized fertilization technology for sweet potato
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The second is to apply top dressing to supplement the nutrition and promote the robust growth of the plant. For the plots with insufficient fertilization, according to the principle of deficiency of sputum and deficiency, and how much to make up, the topdressing of the potato stalks should be carried out in the early stage of the expansion of the potato stalks, and the amino acid chelating NPK ternary compound fertilizer is generally applied to 75 to 10 kg, or dihydrogen phosphate. Potassium 2 to 3 kg. The fertilization method is root application or water dissolution and rooting, and each fertilizer solution is 025~05 kg.
The third is the scientific use of foliar fertilizer, balanced nutrition, and coordinated growth. The use of high-tech products to implement foliar fertilization can balance nutrients, stimulate plant vigor, improve resilience, coordinate vegetative growth and reproductive growth, and greatly enhance the magical effect of quality and yield. Spraying the Lei 2000 functional compound liquid fertilizer for 3 to 4 times throughout the growing season, using 30 kg of two bags of Lei Li 2000 per acre, and spraying 30 kg of stem and leaf with water to increase the yield by 20% to 30%. It can also be used by Laoxiang brand high-efficiency biological liquid fertilizer. It can be sprayed 3 times in the whole growth period. Each batch of sweet potato special liquid fertilizer is used for 25 bags of water and 15 kilograms of water and 15 kilograms of stems and leaves. It can increase yield by about 30%.
Huaxian Agricultural Technology Promotion Center Lu Shuguang