If the plant lacks light, the following problems are li […]
If the plant lacks light, the following problems are likely to occur:
1. Crop yellowing
Most plants show yellow and other abnormal dao characteristics when they grow in the dark. Plants cannot synthesize chlorophyll in the dark, showing the yellow color of carotenoids; the internodes extend quickly; the leaves cannot fully expand and grow; the root system, vascular bundles, and mechanical organization are underdeveloped. Most plants exhibit yellow and other metamorphic characteristics when growing in the dark. Plants cannot synthesize chlorophyll in the dark, showing the yellow color of carotenoids; the internodes extend quickly; the leaves cannot fully expand and grow; the root system, vascular bundles, and mechanical organization are underdeveloped.
2. Frequent pests and diseases
Due to the confined solar greenhouse environment, low light intensity, and photosynthesis of the plants are hindered, the plants grow weak, and their resistance to diseases and insect pests is weak, which also leads to frequent occurrence of pests and diseases. Sunlight greenhouse vegetable diseases and insect pests occur frequently and cause serious damage, which has a great impact on production. It has become an important factor restricting the increase of vegetable output and quality, and is an urgent problem to be solved in greenhouse vegetable production.
3. The crop chief
The long leg loses its original short shape like this, and the phenomenon that the stems and leaves grow wildly is called the "long leg". The lack of sunshine, too dark light, and relatively large amounts of watering are the main reasons. The plants that are already long are basically impossible to change back. You can wait for the spring and autumn to grow, cut off the top to dry the wound, and then stick it. Be sure to remember to basking in the sun (except summer noon), if you can not guarantee the sunshine, the watering should be slightly controlled.
4. Flower drop
There are many reasons for the fall of vegetables. For example, the growth of nutrients is too strong, the growth of plants is too weak, the humidity is too dry or too large, and the temperature is too high or the light is insufficient.
What kind of light do plants need?
The sensitivity of plants to the spectrum is different from the human eye. The most sensitive spectrum of the human eye is 555nm, which is between yellow-green light. It has poor sensitivity to the blue and red regions. Plants are not. They are most sensitive to the red light spectrum and less sensitive to green light, but the sensitivity of sensitive plants to the spectrum is different from the human eye. The difference is not as wide as the human eye. The most sensitive area of plants to the spectrum is 400~700nm. This spectrum is usually called the effective energy region of photosynthesis. About 45% of the energy of sunlight lies in this spectrum.
So the plant growth lamp is still very useful.