The need for supplementary lighting in the greenhouse
In recent years, with the accumulation and maturity of knowledge and technology, the plant growth lamp, which has been regarded as a symbol of high-tech modern agriculture in China, has gradually entered people's field of vision. With the gradual deepening of spectral research, it has been found that different wavelengths of light have different effects on different growth stages of plants. The significance of lighting inside the greenhouse is to extend enough light intensity throughout the day. Mainly used for growing vegetables, roses and even chrysanthemum seedlings in late autumn and winter.
Artificial lighting is a must on cloudy and low-intensity days. Give crops at least 8 hours of light per day at night, and the time of day should be fixed. But lack of nighttime rest can also lead to disordered plant growth and reduced yields. Under the fixed environmental conditions such as carbon dioxide, water, nutrients, temperature and humidity, the "photosynthetic light flux density PPFD" between the light saturation point and the light compensation point of a specific plant directly determines the relative growth rate of the plant. Therefore, an efficient light source PPFD Combination is the key to plant factory productivity.
The application and prospect of fill light
The area of facility horticulture in my country is developing rapidly, and the lighting technology of light environment control for plant growth has attracted attention. Facility horticultural lighting technology is mainly used in two aspects:
1. Use as supplementary lighting for plant photosynthesis when the amount of sunshine is small or the sunshine time is short;
2. Induced lighting built as plant photoperiod and light form; 3. Main lighting for plant factories.
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