Scientific fertilization technology of lettuce

Lettuce is a very common vegetable in our daily life, and the planting area in our country is also very large. When growing lettuce, fertilization is essential if you want to increase the yield of lettuce. Rational fertilization is the key to ensure the robust growth of lettuce, and it also needs to be fertilized according to the planting mode of lettuce. So how to fertilize lettuce? The following editor brings you the scientific fertilization technology of lettuce, let's have a look!

I. Open-field cultivation

1. Application of base fertilizer

Lettuce is generally cultivated in the open field in autumn, but in open field cultivation, before planting lettuce, we should first do a good job of soil preparation and bed work. After turning the soil deeply, apply sufficient base fertilizer, which is mainly rotten farm manure. Topdressing about 2500kg per mu, combined with an appropriate amount of ternary compound fertilizer. When planting, it is necessary to carry out soil planting. The planting depth should be kept at the same level as the ground, and watering should be done after planting so that lettuce can slow down as soon as possible.

2. Reasonable topdressing

Lettuce in our daily life, most of the time is mainly raw food. Therefore, when we are fertilizing, it is not appropriate to apply human feces and urine. Usually, nitrogen is the main fertilizer, and topdressing is about three times during the whole growth period of lettuce. Generally, it is carried out after slow seedling, rosette stage and pericardium stage, each time topdressing is mainly urea or compound fertilizer, and the method of topdressing is to apply with water. During the whole growth period of lettuce, we should also pay attention to maintain an adequate water supply and keep the soil moist. However, in the middle and later stage of heading, we should pay attention to control watering to avoid leaf ball rot.

II. Greenhouse cultivation in winter and spring

1. Application of base fertilizer

When lettuce is cultivated in greenhouse in winter and spring, fertilization is mainly based on base fertilizer, so as to reduce the amount of topdressing and watering water as far as possible to avoid diseases caused by excessive humidity. At the time of planting, about 5000kg of rotten farm manure should be applied per mu, together with an appropriate amount of compound fertilizer. Then turn the soil deeply and make a flat bed, if it is covered with plastic film, then it can be made into a small high bed. When cultivated in solar greenhouse, the plant-row spacing should be kept at about 30*40cm. When raising seedlings, it is necessary to dig ditches and holes for planting.

2. Topdressing

When the lettuce was planted in the greenhouse, about a week after planting slow seedlings, pour an appropriate amount of slow seedling water, and then do a good job of squatting seedlings in the middle ploughing. When the rosette seedlings grow after half a month or so and when the heart leaves are pericardium, apply ternary compound fertilizer or appropriate amount of urea. Then topdressing again during the heading period of lettuce, but because the temperature in winter and spring is relatively low. Therefore, the watering times should not be too much to avoid too low ground temperature or too much humidity. During the heading period, the water supply should be kept uniform, and the humidity should not be neglected. Prevent and cure the phenomenon of cracking ball, which affects the growth of lettuce.

The above is a brief introduction to the scientific fertilization technology of lettuce. That's all for today's introduction. This article is for reference only. I hope it can help you all.