Requirements of environmental conditions for the latest growth of lettuce

Lettuce, also known as lettuce, is an one-to-two-year-old herb of Compositae. The stems and leaves of lettuce are edible, the stem is the lettuce we often eat, and the leaves are lettuce, which can increase appetite and enhance the digestive ability of the human body. It has a wide range of distribution, but lettuce can not be planted everywhere, because lettuce has certain requirements on the growth environment. The following editor brings you the requirements of the growth environment of lettuce, let's have a look!

1. Temperature

Lettuce has strong cold tolerance, the temperature after sowing is not less than 4 degrees, but it is best to keep it at 16-19, at this temperature lettuce will sprout within a week. But the temperature should not be too high, more than 30 degrees, delay the time of seed germination, or even difficult to germinate. After emergence, the temperature should be controlled at about 18 degrees in the daytime and 12-14 degrees at night. Too low temperature can easily lead to the freezing injury of lettuce. Different varieties have different requirements for temperature, so before planting, we should know whether it is suitable for planting according to the variety, weather and other factors.

2. Lighting

Lettuce has a large demand for light, and it is a long-sunshine crop. Under sufficient light conditions, the growth ability of lettuce became stronger and grew faster, which was beneficial to the improvement of yield and quality. Among them, it also depends on the variety, for example, early-maturing varieties are very sensitive to light, and they all need a certain amount of light time after sowing, otherwise their germination will be blocked. If there is not enough light in the planting, the growth rate of lettuce decreases obviously, the leaf is thin and small, the stem is thin and weak, which seriously affects the quality. However, leaf lettuce has a strong negative tolerance, can be properly close planting.

3. Moisture

Lettuce has shallow roots and poor absorptive capacity, but the leaves are large and thin, so the demand for water is relatively large. Lettuce is not resistant to drought and waterlogging, so water management is very important when planting lettuce. In the young stage of lettuce, it is necessary to properly water and keep the soil moist. After entering the budding stage, reduce the amount of water, promote root growth, and prevent excessive water from waterlogging. Finally, when the stem of lettuce expands and heads up, it should be moist at all times, and watering should be controlled before harvest to prevent excessive moisture from causing stem cracking.

4. Soil nutrition

Lettuce has shallow roots, so it has certain requirements for soil, and should not be planted in barren, hardened, poor permeability and uneven soil. To choose places rich in humus, soft and normal drainage and irrigation, lettuce has higher requirements for oxygen, so it is necessary to ensure that the soil has good ventilation and permeability, and the PH value is neutral or sour. In the process of lettuce growth, the demand for nitrogen and potassium is high, and phosphorus is less, but it can not be lacking, otherwise it will affect the normal growth of lettuce.

The above is a brief introduction to the requirements of the growth environment of lettuce, the growth environment of lettuce is actually the management work that we need to do in planting. In order to ensure the normal growth of lettuce, improve the yield and enhance the quality. This is the end of today's introduction, this article is for reference only, friends who want to know more relevant information, please continue to follow us!