The latest course of fertilization techniques and methods for lettuce

Lettuce is a kind of stem vegetable that many people like to eat very much, which has a strong flavor. Now the planting area of lettuce in our country is very large. When growing lettuce, the management must be done well. Among them, fertilization is a very important work in management. So how to fertilize lettuce? The following editor brings you the fertilization technology of lettuce, let's have a look!

1. Characteristics of fertilizer requirement

Lettuce likes to grow in a warm environment, the cold resistance is very poor, the demand for water and nutrition is relatively large. The main edible part of lettuce is underground tuber, so the demand for soil is relatively high. It is necessary to ensure that the soil is permeable and deep and soft when planting. The nutrient requirements of lettuce in the growth process will vary with the change of growth stage. In the prosperous period, the amount of fertilizer needed is very large, so we should pay attention to timely fertilization, and then in the final mature period, we should appropriately reduce the amount of fertilizer application to prevent the decline of storage capacity. Finally, the potassium demand of lettuce is the largest, followed by nitrogen, and finally phosphorus.

2. Apply sufficient base fertilizer

The root distribution of lettuce is relatively shallow, and its depth is about 25 cm. Therefore, the application of base fertilizer is very important, and sufficient base fertilizer is the key to ensure the healthy growth of lettuce. It is also an indispensable work to cultivate high-quality strong seedlings. We should control the amount of fertilizer application according to the planting area, generally applying about 4500kg base fertilizer per mu. The base fertilizer is mainly rotten farm manure, combined with appropriate amount of calcium superphosphate, plant ash and other substances. Promote the growth of lettuce and meet the nutritional needs 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 stops growing during the dormant period in winter. The principle of more and less should be adhered to when topdressing spring lettuce. After planting, the first topdressing can be carried out to improve the survival rate of planting. Then topdressing again about half a month after planting, topdressing fertilizer can also be based on farm manure. However, if the soil is fertile and the base fertilizer is sufficient, it can reduce the amount of topdressing or even no topdressing, on the contrary, if the fertility is insufficient, you should topdressing more fertilizer.

4. Topdressing at rosette stage

Topdressing of lettuce at rosette stage and fleshy formation stage is very important. The nutrition at this time directly affects the yield, and the demand for nitrogen increases sharply when the heading period of lettuce is about 4 months. Therefore, we should pay attention to the appropriate increase of nitrogen elements, and then pay attention to supplement the right amount of calcium, iron and other nutrient elements. Promote the growth of leaves, enhance the photosynthetic capacity and increase the accumulation of photosynthetic matter in lettuce. Then according to the growth stage of lettuce and other actual conditions, reasonable nutrition, topdressing, to meet the rosette, expansion of lettuce nutrition.

The above is a brief introduction to the fertilization technology of lettuce. The fertilization of lettuce is very important, which directly affects our planting efficiency, so we must pay more attention to it. That's all for today's introduction. This article is for reference only. I hope it can help you all.