Physiological activities of plants are most concerned with photosynthesis and respiration. Among them, photosynthesis is particularly important. It is a process of producing organic matter that allows organic matter to accumulate in the plant and then store it. Photosynthesis of plants requires water and carbon dioxide. Both of these factors affect the rate of photosynthesis of plants. At the same time, not only these factors affect photosynthesis, but also the temperature and light intensity in the environment directly affect the rate of photosynthesis of plants. . In order to speed up the process of plant nutrient synthesis, the temperature, light level, and carbon dioxide content in the environment can be appropriately adjusted, and the ambient temperature and illuminance can be measured using a temperature illuminometer, and the carbon dioxide content can be measured using carbon dioxide. Instrument to carry out.
Scientists used photosynthesis of Caragana leaves to compare and understand and found that when the light intensity increases, the light and velocity of the leaves increase significantly. When the light intensity is high, the respiration of the plants is slower than when the light intensity is low. This result shows that the organic matter synthesis process of plants is accelerated at high light intensity. However, it is not an unlimited increase in light intensity, but when the temperature reaches a certain value, it will be counterproductive. At the same time, the effects of temperature on photosynthesis and respiration are: When the temperature rises, the respiration becomes weak, but the light intensity increases, but it is not an unlimited increase in temperature, but when the temperature reaches a certain value, it will be counterproductive. From this, we can see that when the temperature and illuminance increase within a certain range, the growth of the plant will be promoted, and beyond a certain limit, the promotion will be inhibited. Therefore, a monitor is used to monitor the illuminance and temperature at any time. Instrument-temperature illuminance recorder is very necessary. At this time, the temperature illuminance recorder can timely sense changes in temperature and illuminance, and then make the fastest response to the changed environmental parameters.
In different growing seasons, the photosynthetic rate, light compensation point, light saturation point and saturation temperature of C. korshinskii under different light intensities were higher than those of temperature and light intensity, but the temperature of CO2 compensation point and the intensity of light were all high. The lower the respiration rate is, the lower the temperature and the higher light intensity of the blade than the temperature and light intensity of the blade is better adapted to high light intensity and the ability of CO2 assimilation. Therefore, it is necessary to use temperature illuminance monitor to regulate the temperature and illuminance in the environment in order to increase the photosynthesis and reduce the respiration of plants.
The size of pH directly affects the growth and survival of ornamental fish, and determines many chemical processes and physiological chemical processes in water.
The pH value suitable for ornamental fish life is 6-9;
When the pH value of water is greater than 8.0 or less than 7.0, most of the disinfectant in the pool water exists in the form of hypochlorous acid, and the hypochlorite root (residual chlorine) only accounts for a small part, which will undoubtedly greatly reduce the activity of disinfectant in the water, and then affect the effect of algae killing and sterilization.
Soil pH value is one of the basic properties of soil, and it is also one of the important factors affecting soil fertility.
The pH value of all kinds of soils in China varies greatly, most of which range from 4.5 to 9.
It directly affects the form, transformation and availability of soil nutrients.
Soil pH value is closely related to the analytical methods and results of many projects. When reviewing the results of these projects, it is often necessary to refer to the value of soil pH value.
For the soil with low pH value, acid damage and aluminum toxicity may be the limiting factors of crop yield, so it is necessary to consider applying lime to improve the soil.
The national standard soil pH value is 4.5-9.
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