How to fertilize spinach? Do you have any points for attention?

Spinach is a favorite vegetable, spinach is afraid of wet crops, soil moisture more than 20% will produce wet damage and rot roots death. According to the season, spring spinach, summer spinach, autumn spinach, winter spinach fertilizer technology is different. How to fertilize spinach? What are the precautions?

How to fertilize spinach

1. base fertilizer

Spring spinach sowing early, can be in the previous year soil preparation fertilization, application of decomposed organic fertilizer 4000~5000 kg per mu, deep ploughing 20~25 cm, rake flat to make beds, when the early spring soil thaws 7~10 cm deep can be sown.

Summer spinach to choose neutral clay soil is appropriate, available compost and chemical fertilizer mixture spread as base fertilizer. Apply compost 3000~4000 kg, calcium superphosphate 30~35 kg, ammonium sulfate 20~25 kg, potassium sulfate 10~15 kg per mu, deep plough 20~25 cm, rake and make beds.

In autumn spinach, 4000~5000 kg organic fertilizer and 25~30 kg calcium superphosphate shall be applied per mu, 20~25 cm deep ploughing shall be done, and high or flat furrow shall be made.

Spinach overwintering can be sprinkled with decomposed organic fertilizer 5000 kg, calcium superphosphate 25~30 kg, deep ploughing 20~25 cm, so that soil fertilizer is fully mixed, loose soil, promote seedling emergence and root development, base fertilizer is sufficient, seedling growth is healthy, which is the key to vegetable safety overwintering.

2. topdressing

Spring spinach in the middle and late stages of growth, absorption of fertilizer and water increased, per mu can be water dressing ammonium sulfate 15~20 kg. Due to the short growth period of spring spinach, sufficient nitrogen fertilizer can make the leaves grow vigorously and delay the bolting period.

Summer spinach is sown in high temperature season. After 2~3 true leaves appear, apply quick-acting nitrogen fertilizer for 1~2 times. 10~15 kg ammonium sulfate can be applied per mu.

After emergence of autumn spinach seedlings, when they grow to 4~5 true leaves, they should be applied with 2~3 times of quick-acting nitrogen fertilizer in stages. 20~25 kg ammonium sulfate or 10~12 kg urea per mu of water can promote the growth of thick leaves, increase yield and improve quality.

Overwintering spinach needs to dormancy for a long time in winter, so pay attention to fertilization. Before overwintering, spinach seedlings are about 10 cm high. According to the growth situation, overwintering fertilizer should be applied once, and ammonium sulfate can be applied 10~15 kg. In the spring of the following year, topdressing should be applied in time, ammonium sulfate can be applied 20~25 kg and combined with foliar spraying 2~3 times of "phosphorus and potassium power" 800~1000 times. Increase leaf nutrition, promote plant growth spinach into vigorous growth period, should be timely topdressing, combined with watering ammonium sulfate 10~15 kg per mu.

Note: Spinach growth period is short, base fertilizer and topdressing best use quick-acting fertilizer. Spinach is sensitive to ammonium nitrogen. Spinach overwintering season is at the junction of autumn and winter, soil temperature is low, nitrification of soil is weak, ammonium nitrogen fertilizer will not be transformed into nitrate nitrogen soon after application. So it's best to use nitrates.

3. Foliar fertilization of medium and trace elements

Some soil is deficient in trace elements such as iron, zinc, manganese and boron, and yellow leaves, small leaves, perishable soft and poor growth occur. Trace element fertilizers can be supplemented for 2~3 times during the growth period. According to local soil conditions, foliar fertilizers such as "Hefeng boron" 800~1000 times,"Hefeng zinc" 3000~5000 times, and "Hefeng iron" 1500~2000 times can be applied. In case of freezing injury, drought and saline soil, Can be combined with "sea green element" 1000~1200 times solution spraying, can improve the stress resistance of spinach, promote spinach growth.

Second, spinach fertilizer precautions

1. Fertilization must be carried out before spinach bolting and flowering

Fertilization before spinach bolting and flowering can prolong spinach bolting and flowering time, which is beneficial to improve spinach yield and quality.

2. Ammonium nitrogen fertilizer should be carefully used

Spinach is sensitive to ammonium nitrogen fertilizer. The production season of overwintering spinach is at the junction of autumn and winter. At this time, the soil temperature is low and the digestion of soil is very weak. Therefore, it is best to use less ammonium nitrogen fertilizer and more nitrate nitrogen fertilizer appropriately.

How to fertilize spinach, spinach fertilization precautions today for everyone introduced here, I hope Xiaobian's article to help everyone. Spinach's nutritional value is also very rich, you can try to grow it. The fertilization techniques taught by Xiaobian will definitely make your spinach get high yield.