How to fertilize potatoes correctly

With the adjustment of planting structure, more and more farmers grow potato, but due to the influence of traditional fertilization, only farm manure and diammonium fertilizer are used as base fertilizer, not topdressing, which is unscientific. The average amount of fertilizer used for potatoes in the north is 10 kg / mu of nitrogen, 5 kg / mu of phosphorus and 5 kg / mu of potassium, equivalent to 300 kg of urea, 64% diammonium 150 kg and 50% potassium sulfate 150 kg. In order to obtain high-quality and high-yield potato fertilizer in the planting process, the following fertilization methods should be adopted:

Base fertilizer

Base fertilizer is applied with high-quality farm manure combined with chemical fertilizer, with all farm manure and phosphate fertilizer, 50% nitrogen fertilizer and 70% potash fertilizer as base fertilizer. The method of fertilization is ditch application or hole application before planting, with a depth of 15 cm.

Topdressing

Topdressing is divided into two times:

① fertilizer for seedling protection was carried out after finishing seedlings to promote the growth of stems and leaves. The amount of fertilizer applied was 2% of the amount of residual nitrogen fertilizer. Fertilization method: water was applied to the remaining plants.

② to promote potato fertilizer, before the plant and tuber-forming stage, the amount of nitrogen fertilizer and 30% potash fertilizer is 1: 1. Fertilization method: strip application or hole application, the depth is 10 cm, in order to prevent fertilizer loss.

Potato is sensitive to zinc fertilizer and boron fertilizer, so we can spray zinc and boron fertilizer by foliar spraying, 50-70 kg per mu, once every 7 days, 2-3 times.