Relationship between photo synthetically active radiation and crop yield
Definition of photo synthetically active radiation
photo synthetically active radiation refers to solar radiation with a wavelength between 400 and 700nm, which is part of the spectral energy that green plants can absorb and utilize during photosynthesis. The five photosynthetic reactions of plants, including photosynthesis, pigment synthesis, photo period, phototropism and photo morphological mutation, are concentrated in this wavelength range.
Importance of photo synthetically active radiation to crop yield
Energy source
photo synthetically active radiation is the energy source for plant life activities, organic synthesis and yield formation. Crops use photosynthetic active radiation to convert carbon dioxide and water into organic matter through photosynthesis, thereby achieving growth and development, and ultimately forming yield.
Regulatory effect
photo synthetically active radiation has a regulatory effect on photosynthesis, growth and development, plant pathogenesis and metabolism. Light of different wavelengths has different physiological effects on plants, and varies with plant varieties and growth stages. On sunny days, photo synthetically active radiation from direct sunlight plays a leading role and is an important factor affecting crop yield.
Specific mechanism of photo synthetically active radiation affecting crop yield
Affecting photosynthesis
The intensity and time of photo synthetically active radiation directly affect the photosynthesis of crops. Within a certain range, as the intensity of photo synthetically active radiation increases, the photosynthesis rate will also increase, thereby promoting the synthesis of organic matter and helping to increase crop yields. However, when the intensity of photo synthetically active radiation exceeds the light saturation point of the crop, the photosynthesis rate will no longer increase, and may even decrease, and it may also cause damage to the photosynthetic mechanism.
Affecting light energy utilization
The light energy utilization rate refers to the percentage of chemical energy contained in organic matter accumulated by plant photosynthesis per unit area of land to the incident light energy in the same period. The measurement and estimation of photo synthetically active radiation helps to estimate the photosynthesis of plants, which in turn affects the light energy utilization rate. Generally speaking, the factors that limit the light energy utilization rate of crops are mainly light leakage, reflection and transmission losses, population structure and loss of leaf tissue itself. Reasonable control of photo synthetically active radiation can reduce these losses, improve light energy utilization, and thus increase crop yields.
Effect of insufficient photo synthetically active radiation on crop yield
When photo synthetically active radiation is insufficient, the photosynthesis of crops is restricted, the synthesis of organic matter is reduced, resulting in slow growth and development, and reduced yield. For example, in greenhouse cultivation, if photo synthetically active radiation is insufficient, crops may have problems such as leggy growth, thinness, and poor fruit development.
How to use photo synthetically active radiation to increase crop yield
Monitoring photo synthetically active radiation
Use equipment such as photo synthetically active radiation sensors or photoelectric sensors to monitor photo synthetically active radiation data during crop growth in real time. By collecting these data and combining them with crop growth models, crop yields can be predicted and management measures can be adjusted in time.
Reasonable regulation of light
In agricultural production, especially greenhouse cultivation, the optimal light intensity and light time should be determined according to the variety and growth cycle of the crop. Reasonable control of photo synthetically active radiation can not only effectively save light power costs, but also promote the increase of yield. For example, in the early stage of crop growth, the light intensity can be appropriately increased to promote photosynthesis; in the maturity period of crops, the light time can be appropriately reduced to avoid excessive consumption of nutrients.
Improve the utilization rate of light energy
Take measures such as reasonable density planting and changing plant type to create a reasonable leaf area coefficient and increase the absorption and utilization of photo synthetically active radiation by crops. At the same time, preventing and controlling pests and diseases, applying fertilizers and watering reasonably, and improving the environmental conditions for crop growth will also help improve the utilization rate of light energy, thereby increasing crop yields.
https://www.renkeer.com/photosynthetically-active-radiation/ Relationship between photo synthetically active radiation and crop yield
Definition of photo synthetically active radiation
photo synthetically active radiation refers to solar radiation with a wavelength between 400 and 700nm, which is part of the spectral energy that green plants can absorb and utilize during photosynthesis. The five photosynthetic reactions of plants, including photosynthesis, pigment synthesis, photo period, phototropism and photo morphological mutation, are concentrated in this wavelength range.
Importance of photo synthetically active radiation to crop yield
Energy source
photo synthetically active radiation is the energy source for plant life activities, organic synthesis and yield formation. Crops use photosynthetic active radiation to convert carbon dioxide and water into organic matter through photosynthesis, thereby achieving growth and development, and ultimately forming yield.
Regulatory effect
photo synthetically active radiation has a regulatory effect on photosynthesis, growth and development, plant pathogenesis and metabolism. Light of different wavelengths has different physiological effects on plants, and varies with plant varieties and growth stages. On sunny days, photo synthetically active radiation from direct sunlight plays a leading role and is an important factor affecting crop yield.
Specific mechanism of photo synthetically active radiation affecting crop yield
Affecting photosynthesis
The intensity and time of photo synthetically active radiation directly affect the photosynthesis of crops. Within a certain range, as the intensity of photo synthetically active radiation increases, the photosynthesis rate will also increase, thereby promoting the synthesis of organic matter and helping to increase crop yields. However, when the intensity of photo synthetically active radiation exceeds the light saturation point of the crop, the photosynthesis rate will no longer increase, and may even decrease, and it may also cause damage to the photosynthetic mechanism.
Affecting light energy utilization
The light energy utilization rate refers to the percentage of chemical energy contained in organic matter accumulated by plant photosynthesis per unit area of land to the incident light energy in the same period. The measurement and estimation of photo synthetically active radiation helps to estimate the photosynthesis of plants, which in turn affects the light energy utilization rate. Generally speaking, the factors that limit the light energy utilization rate of crops are mainly light leakage, reflection and transmission losses, population structure and loss of leaf tissue itself. Reasonable control of photo synthetically active radiation can reduce these losses, improve light energy utilization, and thus increase crop yields.
Effect of insufficient photo synthetically active radiation on crop yield
When photo synthetically active radiation is insufficient, the photosynthesis of crops is restricted, the synthesis of organic matter is reduced, resulting in slow growth and development, and reduced yield. For example, in greenhouse cultivation, if photo synthetically active radiation is insufficient, crops may have problems such as leggy growth, thinness, and poor fruit development.
How to use photo synthetically active radiation to increase crop yield
Monitoring photo synthetically active radiation
Use equipment such as photo synthetically active radiation sensors or photoelectric sensors to monitor photo synthetically active radiation data during crop growth in real time. By collecting these data and combining them with crop growth models, crop yields can be predicted and management measures can be adjusted in time.
Reasonable regulation of light
In agricultural production, especially greenhouse cultivation, the optimal light intensity and light time should be determined according to the variety and growth cycle of the crop. Reasonable control of photo synthetically active radiation can not only effectively save light power costs, but also promote the increase of yield. For example, in the early stage of crop growth, the light intensity can be appropriately increased to promote photosynthesis; in the maturity period of crops, the light time can be appropriately reduced to avoid excessive consumption of nutrients.
Improve the utilization rate of light energy
Take measures such as reasonable density planting and changing plant type to create a reasonable leaf area coefficient and increase the absorption and utilization of photo synthetically active radiation by crops. At the same time, preventing and controlling pests and diseases, applying fertilizers and watering reasonably, and improving the environmental conditions for crop growth will also help improve the utilization rate of light energy, thereby increasing crop yields.
https://www.renkeer.com/photosynthetically-active-radiation/
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