Strawberries are plants that grow vegetatively and reproductively at the same time. The roots are weakly distributed. The main reason is to apply enough organic fertilizer as base fertilizer. Strawberries require low nitrogen, high phosphorus and potassium during flowering and young fruit period. Nitrogen levels. If phosphorus, potassium and calcium can be applied in the second round of inflorescence, it will be beneficial to the late strawberry growth.

1. bottom fertilizer

Spread and then plough and ridge before land preparation, apply high-quality decomposed farm manure per mu (recommended use of livestock such as cattle, sheep dung, etc., and must be decomposed and sterilized) 3-5 square meters or commercial organic fertilizer, biological fungus fertilizer, etc. , Balanced sulfur-based compound fertilizer (such as pure sulfur-based 17-17-17, Sanan, etc.) 40-80kg.

2. The first top dressing

After the seedlings survive, the topping of the two leaves is carried out to promote the early emergence of the seedlings, to promote the plant's vegetative growth, and to lay the foundation for the differentiation of flower buds. Use 5 liters of humic acid liquid fertilizer per mu, which is more effective in two applications; the method of fertilization is drip irrigation or flushing with water.

3. The second top dressing

Follow the second fertilizer before and after buckling the shed, use high potassium compound fertilizer per acre (such as 18-5-27, 14-5-26, etc.) 10-15kg or balanced water-soluble fertilizer (such as small black bag 20-20-20) 5kg; the method of fertilization is drip irrigation or flushing with water.

4. Follow up fertilizer

During the fruit expansion period, apply 15-20kg of medium nitrogen high potassium compound fertilizer (such as 18-5-27, 14-5-26, etc.) or 5-7kg of high potassium water soluble fertilizer (such as 14-14-30) per acre. , To prevent premature aging; the method of fertilization is drip irrigation or irrigation with water, chasing once every half a month.

For top dressing, if water-soluble fertilizer is used in the whole process, water-soluble fertilizers of 20-20-20, 14-14-30 and other proportions can be selected, alternately flushed, and the amount of fertilizer used at one time is preferably 5-7kg / mu.

5. Foliage top dressing

Strawberries can be sprayed with foliar fertilizer from the time of germination to fruit development, combined with spraying once every half a month, the flowering period can spray 0.3% potassium dihydrogen phosphate 3-4 times, 0.2% borax 1-2 times. Spray 0.2-0.3% Stanley 20-20-20 water-soluble fertilizer (containing trace elements such as calcium) at the initial flowering stage and full flowering period, which can increase the yield and be resistant to storage. The time should be carried out when the leaves are wet in the evening, and the main side of the leaves is sprayed.

Extra-root top dressing is most needed in the bud stage, flowering stage and flower bud differentiation stage. The spraying time is suitable for 4-5 pm.

Precautions

Strawberries are sensitive to chlorine (Cl), and chlorine-containing compound fertilizers should be used with caution, and potassium chloride should not be used.