- Español
- Português
- русский
- Français
- 日本語
- Deutsch
- tiếng Việt
- Italiano
- Nederlands
- ภาษาไทย
- Polski
- 한국어
- Svenska
- magyar
- Malay
- বাংলা ভাষার
- Dansk
- Suomi
- हिन्दी
- Pilipino
- Türkçe
- Gaeilge
- العربية
- Indonesia
- Norsk
- تمل
- český
- ελληνικά
- український
- Javanese
- فارسی
- தமிழ்
- తెలుగు
- नेपाली
- Burmese
- български
- ລາວ
- Latine
- Қазақша
- Euskal
- Azərbaycan
- Slovenský jazyk
- Македонски
- Lietuvos
- Eesti Keel
- Română
- Slovenski
- मराठी
- Srpski језик
How to choose a plant lamp
2022-01-22
The crop itself is the basis for choosing a plant light. The ultimate purpose of using a plant light is for the better growth of the crop. Therefore, when choosing a plant light, you must first understand the light-demanding characteristics of the crop, whether it is a seed or a plant.
1. The light requirements of seeds
The germination of many seeds shows different light requirements. The seeds of some plants can germinate in both light and without light without affecting their germination rate, such as wheat, sunflowers, peas, etc.; some are light-loving seeds, which seriously affect the germination rate in the absence of light, while in the light Good germination, such as tall straight, tobacco, long-toothed grass, field grass, black seed grass, etc.; some are light-phobic seeds, and will only show good germination rate in the dark, such as hay, mandala Flowers, celosia, foraging, onions, although silk and so on. For neutral seeds and light-loving seeds, from the perspective of light quality, both red light and blue light can promote the germination of seeds, and red light can also effectively break the dormancy of seeds.
2. Light requirement characteristics at seedling stage
At the seedling stage, the plant leaves and other related photosynthetic organs have not yet fully developed. At this time, the main role of light is the role of signal, which guides the establishment of plant photomorphology, and induces the transport and synthesis of various substances and hormones in the plant. Induction to achieve the purpose of strong seedlings.
Light Requirement Characteristics in Early Flowering Stage
Plants in this period need sufficient light, which is the period of photomorphogenesis, and good photomorphology is very important for crop yield and quality. The length and stoutness of roots, the size of leaf area, and the thickness and length of stems are closely related to the photosynthesis of plants, and can also be induced by light to achieve a suitable form, thereby improving the yield and quality of crops. For vegetables that use some leaves or non-metamorphic stems as edible parts, the substances contained in the vegetables and the amount of these substances are closely related to the quality of the vegetables. For example, most leafy vegetables contain nitrates. When it is converted into nitrite, this substance is harmful to the human body. Experiments have shown that the nitrate content of leafy vegetables under yellow light irradiation will be significantly reduced.
3. Light requirements during flowering
The characteristics of light demand during the flowering period are mainly manifested in three aspects: light quality, light intensity and light cycle. In terms of light quality, the selection of plant lights mainly considers the light quality composition and ratio of plant lights. For example, red light can induce early flowering, and blue light can prolong flowering. Light and flowering light intensity can be divided into positive plants and negative plants according to the different requirements of different plants for light intensity. The light intensity required by shade plants is much lower than that of sun plants. Excessive light will affect its flowering. Plants that are dioecious can affect the ratio of male to female flowers. The effect of photoperiod on plant flowering is very important. Plants can be divided into long-day, medium-day and short-day. Too long or too short light time will lead to prolonged flowering or even no flowering.
4. Light requirements during the fruiting period
In addition to the need for sufficient light intensity during the fruiting period, the induction of light quality is essential. Blue light is related to nitrogen metabolism in plants, red light is related to carbohydrate metabolism, and yellow light can effectively reduce nitrate content in plant leaves.
5. Choose a plant light
1. The light requirements of seeds
The germination of many seeds shows different light requirements. The seeds of some plants can germinate in both light and without light without affecting their germination rate, such as wheat, sunflowers, peas, etc.; some are light-loving seeds, which seriously affect the germination rate in the absence of light, while in the light Good germination, such as tall straight, tobacco, long-toothed grass, field grass, black seed grass, etc.; some are light-phobic seeds, and will only show good germination rate in the dark, such as hay, mandala Flowers, celosia, foraging, onions, although silk and so on. For neutral seeds and light-loving seeds, from the perspective of light quality, both red light and blue light can promote the germination of seeds, and red light can also effectively break the dormancy of seeds.
2. Light requirement characteristics at seedling stage
At the seedling stage, the plant leaves and other related photosynthetic organs have not yet fully developed. At this time, the main role of light is the role of signal, which guides the establishment of plant photomorphology, and induces the transport and synthesis of various substances and hormones in the plant. Induction to achieve the purpose of strong seedlings.
Light Requirement Characteristics in Early Flowering Stage
Plants in this period need sufficient light, which is the period of photomorphogenesis, and good photomorphology is very important for crop yield and quality. The length and stoutness of roots, the size of leaf area, and the thickness and length of stems are closely related to the photosynthesis of plants, and can also be induced by light to achieve a suitable form, thereby improving the yield and quality of crops. For vegetables that use some leaves or non-metamorphic stems as edible parts, the substances contained in the vegetables and the amount of these substances are closely related to the quality of the vegetables. For example, most leafy vegetables contain nitrates. When it is converted into nitrite, this substance is harmful to the human body. Experiments have shown that the nitrate content of leafy vegetables under yellow light irradiation will be significantly reduced.
3. Light requirements during flowering
The characteristics of light demand during the flowering period are mainly manifested in three aspects: light quality, light intensity and light cycle. In terms of light quality, the selection of plant lights mainly considers the light quality composition and ratio of plant lights. For example, red light can induce early flowering, and blue light can prolong flowering. Light and flowering light intensity can be divided into positive plants and negative plants according to the different requirements of different plants for light intensity. The light intensity required by shade plants is much lower than that of sun plants. Excessive light will affect its flowering. Plants that are dioecious can affect the ratio of male to female flowers. The effect of photoperiod on plant flowering is very important. Plants can be divided into long-day, medium-day and short-day. Too long or too short light time will lead to prolonged flowering or even no flowering.
4. Light requirements during the fruiting period
In addition to the need for sufficient light intensity during the fruiting period, the induction of light quality is essential. Blue light is related to nitrogen metabolism in plants, red light is related to carbohydrate metabolism, and yellow light can effectively reduce nitrate content in plant leaves.
5. Choose a plant light
After understanding the light-demanding characteristics of plants, it is necessary to select grow lights based on the light-demanding characteristics of plants. Starting from the light intensity and light quality, the first is the light quality, and the appropriate light quality composition and ratio are selected; the second is the light intensity, the light intensity of the plant lamp should be greater than the light compensation point of the plant. The selection of lamps and lanterns should be determined according to the actual situation of the cultivation facilities and the different cultivation methods.
