What environmental conditions does lettuce need to grow? A detailed explanation of the latest growing requirements
Lettuce, also known as celtuce, is an annual or biennial herbaceous plant in the Asteraceae family. Both the stem and leaves of lettuce are edible; the stem is the celtuce we commonly eat, and the leaves are the lettuce we eat as a vegetable, and it has the effect of improving appetite and enhancing the human body's digestive capacity. Its distribution range is relatively wide, but not everywhere can lettuce be grown, because lettuce has certain requirements for its growing environment. Below, the editor has brought you the environmental requirements for growing lettuce. Let's take a look together!
1. Temperature
Lettuce has relatively strong cold tolerance. After sowing, the temperature does not need to be lower than 4 degrees, but keeping it at 16-19 is optimal. At this temperature, lettuce will germinate within a week. However, the temperature should not be too high either. When it exceeds 30 degrees, seed germination is delayed, and germination may even become difficult. After emergence, the daytime temperature should be controlled at around 18 degrees, and the nighttime temperature should also be maintained at 12-14 degrees. Too low a temperature can easily cause cold damage to lettuce. Different varieties have different temperature requirements, so before planting, everyone should understand whether it is suitable for planting based on the variety, weather, and various other factors.
2. Light
Lettuce has a relatively high demand for light and is a long-day crop. Under sufficient light conditions, the growth capacity of lettuce becomes stronger and the growth rate is faster, which is beneficial to increasing yield and improving quality. This also depends on the variety. For example, early-maturing varieties are very sensitive to light. After sowing, they all need a certain amount of light time, otherwise germination is hindered. If there is insufficient light during cultivation, the growth rate of lettuce decreases noticeably, the leaves are thin and small, and the stems are weak and feeble, seriously affecting quality. However, leaf lettuce has relatively strong shade tolerance and can be planted appropriately densely.
3. Moisture
Lettuce has shallow roots and poor absorption capacity, but its leaves are large and thin, so its demand for moisture is relatively high. Lettuce is not strongly tolerant of either drought or waterlogging, so when growing lettuce, moisture management work is very important. During the lettuce seedling stage, it should be watered appropriately to keep the soil moist. After entering the rosette stage, reduce the amount of watering to promote root growth and prevent excessive moisture from causing waterlogging damage. Finally, during the stage when the lettuce stem expands and heads form, it must be kept moist at all times. Before harvest, control watering to prevent excessive moisture from causing the stem to split.
4. Soil and nutrients
Lettuce has relatively shallow roots, so it has certain requirements for soil. It cannot be planted in barren, compacted soil with poor permeability and uneven, pitted ground. Choose a place rich in humus, loose, and with normal drainage and irrigation. Lettuce has relatively high oxygen requirements, so the soil must be ensured to have good ventilation and air permeability, with a neutral or slightly acidic PH value. During the growth process of lettuce, the demand for nitrogen and potassium elements is relatively high, while phosphorus is needed less, but it cannot be lacking, otherwise it will affect the normal growth of lettuce.
The above is a brief introduction to the environmental requirements for growing lettuce. The growing environment of lettuce is actually also the management work we need to do well in cultivation. Only then can we ensure the normal growth of lettuce, increase yield, and enhance quality. That is all for today's introduction. This article is for reference only. Friends who want to learn more related information, please continue to follow us!