How to fertilize leek

Leek for fertility demand is still relatively large, in different growth stages, the need for fertilizer is different, then how to fertilize leek?

I. growth stage

Leek is a fertilizer-loving crop with strong fertility tolerance, and its fertilizer requirement varies with age. The leek sown in the same year, especially in the germination stage and seedling stage, needs less fertilizer. The 4-year-old leek has a large growth and needs more fertilizer. Although the amount of fertilizer required at the seedling stage is small and the ability of the root system to absorb fertilizer is weak, it is difficult to meet the needs of its growth and development if a large amount of fully mature organic fertilizer is not applied. Therefore, with the growth of the plant, it is necessary to observe the leaf color and growth in time, combined with watering, topdressing. After the leek has entered the harvest period, due to the large number of harvests, topdressing and replenishing fertilizer must be carried out in time to meet the needs of the normal growth of leek.

Second, root maintenance

During the period of root cultivation, in order to increase the accumulation of nutrients in the underground part, it is also necessary to increase the fertilizer requirements of leek fertilizer, mainly nitrogen fertilizer, combined with appropriate amount of phosphorus and potassium fertilizer. Only when the nitrogen fertilizer is sufficient, the leaves can be thick and tender. The application of phosphorus and potassium fertilizer can promote cell division and expansion, accelerate the synthesis and operation of sugar, but too much potassium application will make the fiber thicker and reduce the quality. The application of sufficient phosphate fertilizer can promote plant growth and nitrogen absorption, and improve product quality.

III. Fertilization

The application of organic fertilizer can improve soil, improve soil permeability, promote root growth and improve quality. Generally, for every 5000 kg of leek, it is necessary to absorb 25kg of nitrogen, 9kg of phosphorus and 39kg of potassium from the soil. This amount can be used as a reference for the amount of fertilizer applied. In production, the amount of fertilizer often exceeds the actual demand. As the leek has the characteristics of strong fertility tolerance, in the case of excessive fertilization, there is basically no phenomenon of leek suffering from fertilizer damage. However, we should not apply fertilizer blindly in the production of leek so as not to waste fertilizer and increase the cost of production. In particular, excessive application of nitrogen fertilizer can easily lead to the decline of resistance, disease occurrence and lodging.

IV. Fertilizer and water management

The absorption capacity of fertilizer was different in different growth stages of leek. The growth of radicles and cotyledons during germination is nourished by the endosperm of the seeds. At this time, the young root is not fully developed, and generally can not absorb and utilize the nutrients in the soil. In the seedling stage, because the growth is small, the ability of the root system to absorb fertilizer is weak, so the amount of fertilizer absorption is also less. However, the application of sufficient organic fertilizer to create a good soil parts is beneficial to the development of root system and the improvement of absorptive capacity. after the peak period of growth, the growth rate is accelerated, the growth is increased, and fertilizer absorption is increased, so fertilizer and water management should be strengthened.

Leek has a large demand for fertilizer, so it is necessary to apply fertilizer according to the growth situation to ensure its good growth.