How to fertilize potatoes (potatoes)? When is the best time to get fat?

Potato, also known as ground egg, potato, potato, etc., is the tuber of Solanaceae. Together with wheat, rice, corn and sorghum, it has become the world's top five crops. So how to fertilize potatoes? When is the best time to get fat?

The fertilization technology of potato should follow the principle of farm manure, chemical fertilizer, base fertilizer and proper topdressing.

Re-apply base fertilizer. Potato is a tuber crop that likes loose sandy soil and requires a cool climate. The amount of base fertilizer generally accounts for more than 2x3 of the total fertilizer application, and the base fertilizer is mainly fully mature farm manure, adding a certain amount of chemical fertilizer, especially phosphorus and potassium fertilizer as base fertilizer, which can improve the physical properties of the soil and is beneficial to the growth and tuber formation. The amount of nitrogen fertilizer in the base fertilizer accounts for about 50%, and the application method is ditch or hole application before planting, with a depth of about 15 cm. If the specific amount of fertilizer application is about 1500 kg per mu, the amount of organic fertilizer 1500kg / mu, urea 20kg / mu, calcium 20kg / mu, potash fertilizer 10kg / mu, or compound fertilizer with high nitrogen and potassium type 40kg / mu can be increased appropriately. Chemical fertilizer should be applied 2cm away from the seed potato to avoid direct contact with the seed potato and cover the soil after fertilization.

Dressing up early. Topdressing should be carried out reasonably in combination with potato growth period, nitrogen fertilizer should be applied in seedling stage, combined with ploughing and soil cultivation, 5kg urea per mu can be applied to protect seedlings. After flowering, potatoes generally do not apply topdressing in the rhizosphere, especially nitrogen fertilizer. After the potato blossoms, 50 kg of 0.3% potassium dihydrogen phosphate solution is sprayed on the leaves per mu. If there is a lack of nitrogen, it can be increased by 100 grams of urea, once every 10 days and 3 times in a row. Potatoes are sensitive to boron and zinc. If the soil is boron-deficient or zinc-deficient, 0.1-0.3% borax or zinc sulfate can be sprayed, usually every 7 days, twice, with 50-70 kg solution per mu.

When is the best time for topdressing potatoes?

1. In order to topdressing nitrogen fertilizer at seedling stage, 20-10-20+TE per mu of water-soluble fertilizer per mu can be used in combination with middle tillage soil, which is beneficial to seedling protection. The traditional method is root urea application, but it is not conducive to absorption.

Topdressing Water soluble Fertilizer for Seedling of Potato at Seedling stage

two。 When potato is topdressing high potassium fertilizer after anthesis, there is more potassium deficiency in southern soil, and more potassium fertilizer should be applied in northern soil. However, potato has a large demand for potassium and should also be paid attention to. High potassium water soluble fertilizer 15-15-30+TE can be applied immediately at the beginning of tuber growth, once every 15 days or so to promote tuber expansion.

Topdressing high potassium water soluble fertilizer on potatoes after flowering

3. Foliar spraying, such as the phenomenon of element deficiency of potato in the later growth stage, can be used for foliar topdressing, spraying trace elements such as boron and copper in sugar alcohol, boron is beneficial to potato block hypertrophy and prevent cracking. Copper can increase protein content and plant respiration. It plays a good role in increasing chlorophyll content, delaying leaf senescence and enhancing drought resistance. At the same time, it can also improve the net photosynthetic productivity of the plant.

It needs to be reminded that potatoes are potassium-loving crops, so special attention should be paid to the application of potassium fertilizer in balanced fertilization. At the same time, should not use too much chlorine fertilizer, such as potassium chloride, should choose potassium sulfate, otherwise it will affect the quality of potatoes.