Sweet potato planting is fastidious
On sweet potato, the distribution of adventitious buds was the most in the head, the second in the middle, and the least in the tail. When arranging potato seeds horizontally or obliquely on the seedbed, master the principle of head-up, tail-down, back-up and belly-down, which can increase the number of seedlings. If large and small potato blocks are arranged in the same seedbed, large potatoes emerge slowly, grow seedlings less, potato seedlings are sturdy, can be arranged in the middle, small potatoes sprout quickly, grow seedlings more, should be arranged on both sides. Large potatoes should be arranged closely and deeply, while small potatoes should be sparse and shallow. After planting, the potato pieces can be covered with thin human and animal manure water, covered with fine fertile soil, and the soil is thick so that the potato can not be seen. Cover the seed and cover the film on the arch frame to keep warm and raise seedlings.
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Sweet potato clever topdressing rapid expansion
Sweet potato is a potassium-loving crop. In its fertilizer requirements, nitrogen accounts for 30%, phosphorus accounts for 10%, and potassium accounts for 60%. In the growth process, potassium deficiency in early sweet potato will appear internodes, petioles become shorter, leaves become smaller; potassium deficiency in late old leaves vein serious lack of green, and gradually fall off, seriously affecting the formation of late yield. The method of applying potassium fertilizer is: ...
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How to prevent and control the split skin of sweet potato
The diseases that cause the cracking of sweet potato are blister disease and nematode disease. Prevention and control measures: first, select disease-resistant varieties. Second, establish disease-free planting land and cultivate disease-free and strong seedlings. Seed potatoes were disinfected with warm water of 50 ℃ ~ 54 ℃ for 10 minutes. Third, carry out soil disinfection. Use 80% dibromochloropropane 1.5 kg / mu to water 100g / mu.
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