Generally, for every 1000 kg of potatoes produced, 3.5-5.5 kg of nitrogen (N), 2.0-2.2 kg of phosphorus (P2O5) and 10.6-12.0 kg of potassium (K2O) are required. From germination to seedling stage, less nutrients are absorbed, accounting for about 25% of the whole growth period; nutrient absorption accounts for more than 50% of the whole growth period from tuber formation stage to tuber expansion stage; nutrient absorption during the starch accumulation period accounts for about the whole growth period About 25% of the period.

Base fertilizer:

1. Fertilization basis: Organic fertilizer can cultivate and improve the soil, and the release of fertilizer effect is slow. The base fertilizer should be applied in combination with organic fertilizer and chemical fertilizer to supply the nutrient requirements of the potato throughout the growth period.

2. Fertilization ratio, dosage and method: organic fertilizer 300-400kg / mu + potassium sulfate type or low chlorine balanced fertilizer (17-17-17, 18-18-18) or high nitrogen high potassium low phosphorus compound fertilizer 40 -60kg / mu. Incorporated when combining land preparation or soil cover

Top dressing: Baomiao fertilizer

1. Basis of fertilization: The application of Baomiao fertilizer is beneficial to promote the growth of stems and leaves, promote early onset, and increase the area of photosynthesis.

2. Fertilization ratio, dosage and method After the seedlings are applied, apply high nitrogen compound fertilizer (24-14-7) 10-15kg / mu, furrow application or hole application.

Top dressing: promote potato fat

1. Fertilization basis: At this time, fertilization can meet the nutrients required for tubers, promote early tubers and multi-tubes.

2. Fertilization ratio, dosage and method: about 50 days after sowing, apply high nitrogen and high potassium compound fertilizer (20-10-21 equal ratio) 25-30kg / mu, strip or hole application, combined with weeding Dig a depth of 7-10 cm between the rows, and fertilize the soil after fertilization to prevent fertilizer loss.