What is the best fertilizer for potatoes?

Potato fertilization time

Potatoes require a lot of fertilizer. Apply nitrogen fertilizer early and more potassium fertilizer. Stop fertilizing when the stems and leaves are aging. Apply nitrogen fertilizer to the plants in the seedling stage, and it is best to combine it with tillage and soil cultivation.

After potatoes bloom, they need to be topdressed with high-potassium fertilizer, once every 15 days. Applying more potassium fertilizer in the south and more phosphorus fertilizer in the north can promote the enlargement of its tubers.

What fertilizer to use for potatoes

1. During the entire growth period of potatoes, potassium fertilizer is absorbed the most, followed by nitrogen fertilizer. You can use farmyard manure to improve the soil's water retention capacity and help the root system's respiration and absorption.

2. The application of potato compost is also very important, because it is rich in nutrients and has a long-lasting fertilizer effect. It is a very complete fertilizer. It can be effectively decomposed when it enters the soil and has a very high utilization rate. If the base fertilizer is applied sufficiently, no topdressing is needed during the entire growing period.

Potato fertilization method

1. Base fertilizer : The base fertilizer for potatoes is mainly organic fertilizer, 22.5-45 tons per hectare, which can be applied along the sowing furrows or in holes on the seed potato pieces and then covered with soil. When the amount of coarse fertilizer is large, it should be spread and then plowed into the soil.

2. Top dressing : Potato top dressing mostly uses nitrogen fertilizer, which is applied before flowering. Generally, no nitrogen fertilizer is applied after flowering. In the later stage, 0.5% urea solution and 0.2% potassium dihydrogen phosphate solution can be sprayed as foliar top dressing.

Potato fertilization precautions

Most soils have high phosphorus content. Do not apply too much phosphorus fertilizer, otherwise it will not only increase the cost of fertilizer but also reduce the quality of potato tubers.