Fertilization technology of lettuce

Lettuce is a kind of stem-like vegetable that many people like to eat very much. It has a strong fragrance. Now lettuce in our country's planting area is very large. When planting lettuce, management must be done well. Fertilization is a very important part of management. So how do you fertilize lettuce? The following small series brings you the fertilization technology of lettuce. Let's have a look together!

1. Characteristics of fertilizer requirement

Lettuce likes to grow in warm environment, cold resistance is very poor, the demand for water and nutrients is relatively large. The main edible parts of lettuce are underground tubers, so the requirements for soil are relatively high. When planting, ensure that the soil permeability is strong and deep and soft. The nutrient requirements of lettuce vary with the growth stage. In the flourishing period, the fertilizer requirement is very large, so we should pay attention to timely fertilization, and then in the final maturity period, we should appropriately reduce the fertilizer amount to prevent the storage capacity from decreasing. Finally, lettuce had the highest potassium requirement, followed by nitrogen and phosphorus.

2. Apply enough basal fertilizer

The root distribution of lettuce is relatively shallow, and its depth is about 25 cm. Therefore, the application of basal fertilizer is very important, and the application of sufficient basal fertilizer is the key to ensure the healthy growth of lettuce. It is also an indispensable work to cultivate high-quality seedlings. We should control the amount of fertilizer according to the planting area, and generally apply about 4500kg of base fertilizer per mu. Base fertilizer is mainly decomposed farm manure, with appropriate amount of calcium superphosphate, plant ash and other substances. Promote the growth of lettuce, meet the nutritional requirements of lettuce growth.

3. Reasonable topdressing

When planting lettuce, we should carry out reasonable topdressing according to the season. Spring lettuce is usually planted around September of the first year, and then enters a dormant period in winter to stop growing. Spring lettuce topdressing should adhere to the principle of chasing more and less. After planting, the first topdressing can be carried out to improve the survival rate of planting. Then in the planting after about half a month again topdressing, topdressing fertilizer can also be mainly farm manure. However, if the soil fertility is large and the base fertilizer is sufficient, the amount of topdressing can be reduced or even no topdressing. On the contrary, if the fertility is insufficient, more topdressing should be done.

4. Topdressing in rosette stage

Topdressing is very important in rosette stage and meat formation stage of lettuce. The nutrition at this time directly affects the yield. When lettuce is about 4 months old, the demand for nitrogen will rise sharply. Therefore, attention should be paid to appropriately increasing nitrogen, and then pay attention to supplementing appropriate calcium, iron and other nutrients. Promote leaf growth, enhance photosynthetic capacity, improve photosynthetic matter accumulation of lettuce. According to the actual situation of lettuce growth stage, reasonable nutrition is supplemented, topdressing is carried out to meet the nutrition required by lettuce lotus seat and expansion.

The above is a simple introduction to lettuce fertilization technology. The fertilization of lettuce is very important, which directly affects our planting efficiency, so we must pay more attention to it! Today's introduction is here, this article is for reference only, I hope to help everyone oh!