The visible light and ultraviolet rays in the sunlight, such as red, orange, yellow, green, blue, blue, and purple, are the main rays absorbed by plants for their life activities. Among them, red and yellow light are the most efficient light for plant photosynthesis. Purple light and ultraviolet light are the main light energy for plant pigment formation. In addition, infrared light can promote the elongation of plants, and ultraviolet light can suppress the elongation of shoots. . When sunlight shines on a plant body, there are two forms of direct light and scattered light. Scattered light is generally advantageous for flower cultivation, and excessive direct light tends to be harmful.
If the plant lacks illumination or lack of light during the growth period, the stems and leaves of the plant will grow poorly and the flowering will not flourish or bloom. Different flowers have different lighting requirements. According to their different requirements for light intensity, they are divided into the following four categories:
1. Positive flowers Positive flowers Hi light, not shade, must be in full sunlight, in order to normal growth and development. One year or two of open field flowers and some greenhouse flowers fall into this category. Such as a string of red, cockscomb, half-branch, poinsettia, tequila, peach, plum, rose, pomegranate, jellyfish, Milan, jasmine, lotus, chrysanthemum, etc., these, flowers, such as insufficient light, will cause the migration and organization of branches and leaves Soft and unpleasant, pale leaf color, difficult to flower or poor flowering.
2. Neutral flowers Neutral flowers do not like strong light, slightly tolerant to yin, and can grow well in light or under shade. Such as sweet-scented osmanthus, oleander, palm, cycads, and cherry blossoms, waxier than the sun, is a neutral sun.
3. Negative flower The negative flower is suitable for the species that grow under insufficient light or under scattered light conditions. It requires that the degree of shading be kept at 50% and it cannot tolerate strong light. Such as rhododendron, camellia, calla lily, evergreen, auspicious grass, jade and so on. The foliage plants also require less light.
4. The strong negative-negative flower-negative flower requires shade of about 80%, and can not adapt to strong light, such as orchids and ferns.
In addition, the flowering habits of many flowers also have a close relationship with the length of the light. This is due to the difference in geographical origin of their origin. At the equator, there is almost no change in the length of sunshine (the length of daylight exposure time from sunrise to sunset) is about 12 hours.
With the increase of latitude in the northern hemisphere, the summer sunshine is longer and the winter sunshine is shorter. Within one year, the winter solstice is the shortest period of sunshine, and it gradually becomes longer. The summer solstice is the longest period of sunshine in a year, and then gradually shortened until the winter solstice. Sunlight has a decisive influence on the development of plants, especially on flowering results. In other words, the growth and development of flowers can only enter the flowering stage under certain conditions of alternating light and darkness. This phenomenon is called “light†in cultivation. Cycle phenomenon. Therefore, they can be divided into three categories based on different light cycles:
1. Long-day flower hydrangea, violet, impatiens, snapdragon, etc. need more than 12 hours of light a day to bloom. If you do not get this condition during the development period, it will not bloom. Long-day flowering flowers bloom mostly in the summer, and for their origin, they are generally temperate.
2. Short-lived flowers such as chrysanthemum, poinsettia, and citron can also accelerate their development and flower in advance if they have only 8 to 12 hours of sunshine per day during development; conversely, when the sunshine hours exceed 12 hours, Will delay flowering. Short-day flowers often originate in the tropics and subtropics.
3. Neutral flowers Neutral flowers are not sensitive to the length of sunshine. As long as they grow normally, they do not affect flowering. Such as rose, Mirabilis, Dianthus, Cyclamen, geranium and so on.
If the plant lacks illumination or lack of light during the growth period, the stems and leaves of the plant will grow poorly and the flowering will not flourish or bloom. Different flowers have different lighting requirements. According to their different requirements for light intensity, they are divided into the following four categories:
1. Positive flowers Positive flowers Hi light, not shade, must be in full sunlight, in order to normal growth and development. One year or two of open field flowers and some greenhouse flowers fall into this category. Such as a string of red, cockscomb, half-branch, poinsettia, tequila, peach, plum, rose, pomegranate, jellyfish, Milan, jasmine, lotus, chrysanthemum, etc., these, flowers, such as insufficient light, will cause the migration and organization of branches and leaves Soft and unpleasant, pale leaf color, difficult to flower or poor flowering.
2. Neutral flowers Neutral flowers do not like strong light, slightly tolerant to yin, and can grow well in light or under shade. Such as sweet-scented osmanthus, oleander, palm, cycads, and cherry blossoms, waxier than the sun, is a neutral sun.
3. Negative flower The negative flower is suitable for the species that grow under insufficient light or under scattered light conditions. It requires that the degree of shading be kept at 50% and it cannot tolerate strong light. Such as rhododendron, camellia, calla lily, evergreen, auspicious grass, jade and so on. The foliage plants also require less light.
4. The strong negative-negative flower-negative flower requires shade of about 80%, and can not adapt to strong light, such as orchids and ferns.
In addition, the flowering habits of many flowers also have a close relationship with the length of the light. This is due to the difference in geographical origin of their origin. At the equator, there is almost no change in the length of sunshine (the length of daylight exposure time from sunrise to sunset) is about 12 hours.
With the increase of latitude in the northern hemisphere, the summer sunshine is longer and the winter sunshine is shorter. Within one year, the winter solstice is the shortest period of sunshine, and it gradually becomes longer. The summer solstice is the longest period of sunshine in a year, and then gradually shortened until the winter solstice. Sunlight has a decisive influence on the development of plants, especially on flowering results. In other words, the growth and development of flowers can only enter the flowering stage under certain conditions of alternating light and darkness. This phenomenon is called “light†in cultivation. Cycle phenomenon. Therefore, they can be divided into three categories based on different light cycles:
1. Long-day flower hydrangea, violet, impatiens, snapdragon, etc. need more than 12 hours of light a day to bloom. If you do not get this condition during the development period, it will not bloom. Long-day flowering flowers bloom mostly in the summer, and for their origin, they are generally temperate.
2. Short-lived flowers such as chrysanthemum, poinsettia, and citron can also accelerate their development and flower in advance if they have only 8 to 12 hours of sunshine per day during development; conversely, when the sunshine hours exceed 12 hours, Will delay flowering. Short-day flowers often originate in the tropics and subtropics.
3. Neutral flowers Neutral flowers are not sensitive to the length of sunshine. As long as they grow normally, they do not affect flowering. Such as rose, Mirabilis, Dianthus, Cyclamen, geranium and so on.
Spicy Chilli Sauce,Beef Chili Sauce,Chicken Chili Sauce,Mushroom Chili Sauce
Ningxia Ningyang Halal Food Co., Ltd. , http://www.ningyangfood.com