The latest course of lettuce field management techniques and methods

Lettuce is the most common vegetable in our life. Its stems and leaves are edible, each with a flavor. Lettuce has strong adaptability and is widely planted in China. So how do you manage it when you grow it? Let's take a look at the detailed introduction.

1. Fertilization

lettuce in the planting process of fertilizer demand is high, in order to make it normal growth, higher yield, fertilization work should be paid attention to. During the whole growth period, topdressing should be applied three times. The first time should be carried out 10 days after planting. At this time, some urea or organic fertilizer should be mainly applied. Generally, irrigation should be adopted to avoid excessive concentration and affect seedling growth. The second fertilization is when lettuce grows to 25 cm, then urea is still the main fertilizer to promote its growth, generally 30 jin urea is applied per mu. The third fertilization was mainly urea when the fleshy stem expanded, combined with foliar topdressing spraying 0.3% potassium dihydrogen phosphate to prevent stem cracking.

2. Intertillage and weeding

After that, we should pay attention to weeding work. We apply a large amount of chemical fertilizer when fertilizing, and it is still nitrogen fertilizer based on urea. At this time, in addition to lettuce growing faster, weeds also grow faster, so we should weed frequently so as not to compete with lettuce for fertility. Long-term application of chemical fertilizer will lead to the reduction of organic matter content in the soil, which is easy to cause soil hardening and unfavorable for the growth of underground rhizomes. Therefore, it is necessary to cultivate in time, loosen the soil, increase soil permeability and promote the growth of underground rhizomes.

3. Irrigation

Water management of lettuce is also very important. Watering should be done in time when the stem begins to expand. A small amount of nitrogen and potassium fertilizer should be applied in combination with watering to promote rapid expansion of stem and increase yield. However, watering should not be too early or too late, watering too early will lead to excessive leaf growth, excessive consumption of nutrients, adverse stem growth, for low temperature resistance, easy to infect diseases, while watering can not be excessive. If lettuce is short of water, the growth of leaves will be inhibited. In case of long-term drought, it is easy to crack stems in case of heavy rain, so keep the soil moist in the middle and late stages of growth.

4. Pest control

Diseases and insect pests are also one of the reasons that harm the quality and yield of lettuce. The main diseases of lettuce are downy mildew and sclerotia, while aphids are the main pests. To eliminate technology in time, this time the old leaves and sick leaves, prevent diseases, spray Bordeaux mixture control when the disease occurs, spray once every 7-10 days, the effect is excellent.

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