When do strawberries usually grow? Instructions for fertilization are attached

Strawberry is a kind of fruit with unique shape, sweet taste and rich nutrients, which is deeply loved by consumers. Especially when strawberries are on the market, people like to go to the strawberry garden to pick strawberries in person, so that they can not only experience a lot of fun, but also eat fresh strawberries. When do strawberries usually grow? What are the key points for fertilization?

When do strawberries usually grow?

Strawberry cultivation in greenhouse is generally divided into facilitative cultivation and semi-facilitative cultivation. The planting time should be early, and it can be planted 5-10 days after flower bud differentiation of terminal inflorescence. In warm areas such as Shanghai and Zhejiang, it is generally planted from mid-September to mid-October, while in Beijing and Hebei, it is planted from mid-late August to early September. If it is false, it can be delayed until mid-September.

The colonization period of semi-facilitative cultivation can be divided into two periods: one is before flower bud differentiation, that is, around late August and early September, and the other is after flower bud differentiation, about early October. Generally, it is appropriate to plant in the north before flower bud differentiation, because the cold in the north and the low temperature in autumn come early, and the planting party affects the recovery of plant root system. In the southern region, it is mostly planted after flower bud differentiation, and there is still a relatively sufficient growth time after planting because of the warm autumn in the southern region. after slowing down the seedlings, the seedlings grow well, which is beneficial to blossom and fruiting.

Notes on fertilization of strawberries

1. Strawberries are planted once a year in the open field, and organic manure should be applied in combination with deep ploughing and soil preparation before planting. Each mu of barnyard manure can be applied with 4 tons of barnyard manure (equivalent to 20 kilograms of nitrogen, 16 kilograms of phosphorus, 25 kilograms of potassium) and 80 kilograms of superphosphate. For slightly acidic soil, about 100 kg of lime should be applied per mu.

2. The topdressing of strawberries is generally 1-3 times. In the fields with sufficient base fertilizer and good soil conservation, one-time fertilizer can be applied before strawberry flowering, and the fertilizer is mainly phosphorus and potassium combined with appropriate amount of nitrogen fertilizer. If it is applied in three times, it should be pursued once before flowering and before sprouting in early spring, generally applying 45% compound fertilizer 10kg / mu, or urea 8kg / mu, plus a certain proportion of phosphorus and potassium fertilizer, in order to promote green growth and inflorescence development. The other time was applied 2 weeks before harvest or 2-3 weeks after anthesis.

2. Strawberry protected cultivation has less accumulation of plant storage and nutrients, and shorter time for flower bud differentiation and development. Therefore, the requirement of base fertilizer is less than that of open field cultivation, and the number of topdressing is increased, so drip irrigation is the best way to apply fertilizer. General base fertilizer application of organic fertilizer, with 3 to 4 tons per mu, plus about 80 kg of calcium magnesium phosphate fertilizer. The times of topdressing strawberry cultivated in protected field can be divided into 5 to 7 times, and the amount of topdressing is about 1 / 2 of the amount of basal fertilizer. The first to the fourth topdressing should be applied before budding to the coloring of the first batch of fruits, mainly nitrogen and the combination of phosphorus and potassium, and the fifth to the seventh time should be applied in stages after the first fruit harvest, mainly with phosphorus, potassium, calcium and magnesium, with appropriate amount of nitrogen fertilizer to supplement the nutrient demand of strawberries. Fertilization of strawberry in protected field should be combined with irrigation to reduce salt barrier.