Field management technology of lettuce

Lettuce is the most common vegetable in our life, its stems and leaves are edible, each has its own flavor, lettuce has strong adaptability, so it is widely planted in our country. So how to manage it when planting? Let's take a look at the detailed introduction.

1. Fertilization

Lettuce has a high demand for fertilizer in the process of planting. In order to make its normal growth and obtain higher yield, more attention should be paid to fertilization. Topdressing should be applied three times in the whole growth period, and the first time should be carried out 10 days after planting, when some urea or organic fertilizer is mainly applied, usually by watering, so as not to affect the growth of seedlings. The second fertilization in lettuce growth to 25 cm, at this time is still urea-based, to promote its growth, generally 30 jin of urea per mu. The third fertilization in the fleshy stem expansion, mainly urea, combined with foliar topdressing spraying 0.3% potassium dihydrogen phosphate to prevent stem cracking.

2. Ploughing and weeding

After that, we should pay attention to weeding work. We apply a large amount of chemical fertilizer when applying fertilizer, and it is urea-based nitrogen fertilizer. At this time, in addition to lettuce growing faster, weeds also grow faster, so weeds should be weeded frequently to avoid competing with lettuce for fertility. The long-term application of chemical fertilizer will lead to the decrease of soil organic matter content, which is very easy to cause soil consolidation, which is disadvantageous to the growth of underground rhizome, so it is necessary to timely plough, loosen the soil, increase soil permeability and promote the growth of underground rhizome.

3. Irrigation

The water management of lettuce is also very important. When the stem begins to expand, it should be watered in time, combined with a small amount of nitrogen and potassium fertilizer to promote the rapid expansion of the stem and increase the yield. However, watering should not be too early or too late. Early watering will lead to excessive growth of leaves and excessive consumption of nutrients, which is disadvantageous to stem growth. For low temperature resistance, it is easy to be infected with diseases. At the same time, watering should not be overdone. If the lettuce is short of water, the growth of the leaves will be inhibited, and the stem will easily crack in case of heavy rain for a long time, so it is necessary to keep the soil moist in the middle and later stages of growth.

4. Pest control

Diseases and insect pests are also one of the reasons for harming the quality and yield of lettuce. The main diseases of lettuce are downy mildew, Sclerotinia sclerotiorum and so on, and the main pests are aphids. It is necessary to rule out the technology in time, the old and diseased leaves should be prevented from diseases, and Bordeaux solution should be sprayed every 7-10 days, and the effect is excellent.

The above is the introduction of lettuce field management technology, hope to help you, want to know more related knowledge, please follow us.