Nowadays, growers who grow in greenhouses will choose to use LED grow lights to supplement light. LED grow lights are also widely used in indoor planting, but to use LED grow lights to achieve the desired effect, you also need to pay attention to the minefields in many aspects, don't step on it.
Many growers have many misunderstandings in the winter lighting of greenhouses:
1. Hanging reflective film in the whole shed
Reflective film is favored by the majority of growers because of its good light-increasing and temperature-increasing effect. Improve the utilization of light, but it will cause the temperature to drop at night. The reason why the greenhouse has good insulation effect is that the wall and pillars absorb the heat stored by the light energy during the day and emit it at night to maintain the night temperature. After the reflective film is hung in the whole shed, the light is blocked from shining on the wall, which will not play the role of heat preservation and affect the growth of plants.
2. Plant crops near walls and pillars
Growers like to plant vine vegetables near the pillars and the back wall, allowing them to climb up along the wall, which will affect the wall and pillars to store heat, and will also cause unreasonable planting, which will bring negative effects.
3. Unreasonable planting layout
When planting different kinds of vegetables in greenhouses, if they are not laid out in accordance with the laws of nature, the growth space of plants will be crowded. There will be insufficient or uneven lighting in the supplementary light. Then the growth of plants will appear stunted, some grow taller, and some grow taller. It grows low, and the phenomenon of blocking and shading occurs.
4. High planting density
The planting density should not be too high, try to distribute all the plants evenly, ventilate and transmit light uniformly, so that the plants grow better, trim vines, pick old leaves, topping and topping and other planting measures, so that the plants are not so crowded. A uniform fill light can be obtained.
5. The ceiling does not remove dust and snow
Over time, the ceiling is easy to accumulate dust, and in winter, it will also accumulate snow, which will reduce the intensity of light and insufficiently illuminate the optical fiber in the shed, which seriously affects the light transmittance of the greenhouse.
6. Don't pull the grass curtain for fear of lowering the temperature
Growers choose not to draw grass curtains when encountering continuous cloudy days. Even with weak scattered light, grows can photosynthesize. Without sunlight, they cannot photosynthesize. They do not produce any nutrients and consume organic nutrients. Greatly increase the burden on plants.
7. The use of LED grow lights is unreasonable
The unreasonable use of LED grow lights is caused by incorrect spectrum selection, insufficient power, insufficient light supplement time, incorrect light supplement distance and unreasonable installation of uniform light.
Greenhouse winter planting solution
1) The reasonable light supplement of LED grow lights is one of the important reasons that affect the harvest of vegetables in greenhouses. Vegetables will photosynthesize under the irradiation of LED grow lights, so that the light compensation point of plants can reach and exceed, combined with the moisture, temperature and humidity in the greenhouse Wait for the plants to grow better.
2) Choose plant varieties for planting according to market demand. Choosing the right plant varieties is the first step to open the market. Reasonable use of different types of LED grow lights to fill light, and good time to market is an important part of occupying the market.
3) One more thing to pay special attention to is the air circulation problem in the shed. If the temperature in the shed is too high, it will cause the loss of vegetable water and affect the growth of plants; when using LED grow lights, don’t worry about this problem. The heat is small and will not cause such problems.
Tips for planting and supplementing light in greenhouses in winter:
(1) Different types of plants are planted reasonably and arranged in accordance with natural rules. For example, plant plants in the northern hemisphere. It is best to follow the principle of high in the north and low in the south, so that all plants can be evenly illuminated, and try not to shade between plants;
(2) At the same time, reflective measures can be taken in the greenhouse to improve the effective utilization of LED grow lights. Use reflective materials when setting up the frame. In addition, all the supports do not need to be upright at 90 degrees. Keep the middle supports upright, on the north and south sides. The bracket is slightly inclined, which can increase the light utilization rate by 5--10%, and it can be reused by plants.
(3) Cleaning the roof of greenhouse planting regularly clean up "roof garbage", otherwise the transparency is not enough, it will have a great impact on the light and temperature in the shed, which will affect the photosynthesis and respiration of plants, and ultimately affect the yield and quality of plants .
(4) Using LED grow lights to fill light, on the one hand, you can appropriately shorten the illumination distance. Generally, when you buy LED grow lights, you will purchase them according to the installation area and the irradiated area of the LED plant lights. The irradiation area can be appropriately shortened to increase plants in a reasonable range. Fill light.
(5) Reflective film
The mulching film and the reflection of the water droplets attached to the surface under the mulching film can strengthen the reflected light and scattered light near the ground, and the mulching film also has a better thermal insulation effect.
These make LED grow lights more popular in the market and are deeply loved by vegetable growers in greenhouses. The development trend of LED grow lights will get better and better in the future.
