Flower Growth and Light
Core introduction to the main text: contents about common knowledge of flower cultivation, flower growth and light, read on!
III. The Influence of Light Quality on Flowers
Light quality refers to the composition of light, which means the components of sunlight with different wavelengths. The wavelength range of sunlight is mainly between 150 and 4000nm, among which the visible light wavelength range is between 380 and 760nm, accounting for 52% of the total solar radiation, with infrared accounting for 43% and ultraviolet light accounting for 5% in the invisible light.
Different spectral components have different effects on plant growth and development. In the visible light range, most light waves can be absorbed and utilized by green plants, among which red light is absorbed and utilized the most, followed by blue-violet light. Green light is mostly transmitted or reflected by leaves and is rarely absorbed and utilized. Red and orange light have the highest photosynthetic activity, which is beneficial for the formation of carbohydrates; blue, indigo, and violet light can inhibit plant elongation, making the plant compact, and can promote the formation of anthocyanins, which are also the most important light for cell differentiation; invisible ultraviolet light can also inhibit stem elongation and promote the formation of anthocyanins. In nature, flowers in high mountains generally have characteristics such as short and stocky stems, reduced leaf area, stems and leaves rich in anthocyanins, and bright flower colors. This is not only related to the low temperature in high mountains but is also closely related to the abundance of short-wavelength light such as blue, purple, and green, as well as ultraviolet light at high altitudes.
Generally speaking, seed germination is not much related to light, and it can proceed normally in either darkness or light. However, there are a few plants whose seeds need to be in the light to germinate well, with light becoming a necessary condition for their germination, such as primroses, begonias, azaleas, etc. For these seeds, there is no need to cover them with soil after sowing, or only a little soil is needed. On the contrary, there are also a few plant seeds that can only germinate in the dark, such as amaranth, dodder, etc. These seeds must be covered with soil after sowing.
This article shares the related explanation of flower growth and light (III), hoping to bring a little help to your life!