What kind of fertilizer is most taboo in growing potatoes?

Potatoes are more sensitive to fertilizer than other crops, generally growing potatoes are most taboo to apply chlorine fertilizer, chlorine fertilizer will inhibit the normal growth of potatoes, serious will also lead to diseases and insect pests, growing potatoes do not apply raw fertilizer, otherwise root burning will affect its growth.

Fertilizer usage for growing potatoes:

Base fertilizer: the general base fertilizer is mainly organic fertilizer, supplemented by potato special potassium sulfate compound fertilizer, the amount of organic fertilizer is 2500-3000 kg per mu, and about 45-50 kg per mu of potato special fertilizer.

Topdressing: generally, topdressing should be skillfully applied, depending on the growth of potatoes. Appropriate fertilization, when the first topdressing is full seedling, combined with ploughing and cultivating soil, topdressing organic fertilizer or quick-acting fertilizer, watering in time after fertilization; the second topdressing is in the budding stage, when the potato tuber expands and the amount of fertilizer needs to increase, which is the period of the largest amount of fertilizer. generally, 5-15 kg of potato special fertilizer can be applied per mu, but not after ridge closure.

Seed fertilizer: look at the soil nutrient content, if the nutrient is low, you can apply 15-20 kg special potato fertilizer per mu to make a kind of fertilizer. Seed fertilizer is generally applied in ditch or hole, and can not be in direct contact with seed potato.

Common potato special potassium sulfate compound fertilizer formula is 46% (16-10-20), 51% (17-17-17), and so on. These common products contain high-quality humic acid, which not only improves the yield and quality of potatoes, but also improves soil properties and soil organic matter content.