In today’s agricultural field, greenhouse planting has become a very important planting method. With the acceleration of urbanization, the demand for agricultural products is growing. Greenhouse planting can achieve efficient agricultural production on limited land resources and meet the market demand for various fresh vegetables, fruits and other crops. In the relatively closed environment of greenhouse planting, gas monitoring has become a crucial link, which is directly related to the growth and development of crops and the final yield.
In the special ecosystem of the greenhouse, oxygen plays an indispensable role in the growth of crops, just like human survival.
Crops decompose the organic matter stored in the body through respiration, release energy, and use it to maintain their own life activities, such as cell division and material transportation, and this process must be accompanied by sufficient oxygen. If the oxygen concentration in the greenhouse is too low, just as humans feel uncomfortable in an oxygen-deficient environment, crops will also be seriously affected. They will show a series of growth problems, such as slow growth, and the seedlings that were originally vigorous and thriving may become sluggish, the elongation of the stems will slow down, and the germination of new leaves will also become slow. Yellowing of leaves is also an obvious symptom. Normal leaves should be emerald green and full. When the lack of oxygen, the synthesis of chlorophyll in the leaves is blocked, the chlorophyll content is reduced, and the leaves gradually lose their green color and turn yellow.Smaller fruits are also one of the consequences of insufficient oxygen. The development of fruits requires sufficient energy supply. Insufficient oxygen leads to abnormal respiration. Insufficient energy supply will cause the fruit to fail to fully develop, thus affecting its size and quality.
In greenhouse cultivation, in order to accurately grasp the oxygen concentration, oxygen concentration sensors are often used.
The oxygen concentration sensor can accurately convert the oxygen concentration in the greenhouse into an electrical signal. This electrical signal is like a messenger that transmits information. It can accurately output the information of oxygen concentration to the controller. After receiving the signal, the controller can process and analyze the data to realize real-time monitoring of the oxygen concentration in the greenhouse. This sensor has high sensitivity and accuracy, and can capture small changes in oxygen concentration in time, providing accurate data support for greenhouse growers.
Carbon dioxide plays a crucial role in the growth of plants and is an important raw material for plant photosynthesis.
Photosynthesis is like a “food factory” for plants. In this process, plants use light energy to convert carbon dioxide and water into organic matter that stores energy, while releasing oxygen. The right amount of carbon dioxide concentration can provide sufficient raw materials for this “factory”, thereby promoting crop growth and increasing yields. When the carbon dioxide concentration is in the right range, the leaves of crops will be greener and thicker, the photosynthesis efficiency will be improved, the plants will grow stronger, and the fruits will be fuller and juicier. However, if the carbon dioxide concentration is too high or too low, it will disrupt the normal rhythm of photosynthesis. When the concentration is too high, it may have a negative impact on the physiological functions of plants; when the concentration is too low, plants will not be able to fully photosynthesize due to lack of raw materials, resulting in limited growth.
In order to ensure that the carbon dioxide concentration in the greenhouse is within the right range, carbon dioxide sensors play an important role.
For example, some sensors use the absorption characteristics of carbon dioxide to light of a specific wavelength to detect its concentration. After this sensor is installed in a suitable position in the greenhouse, it is like a loyal guardian, always paying attention to the dynamics of carbon dioxide concentration. Once the concentration changes, it can quickly feed back the data to the growers so that they can adjust the environmental conditions in the greenhouse in time.
In the greenhouse planting environment, in addition to paying attention to gases that are beneficial to crop growth, the monitoring of harmful gases should not be ignored.
Harmful gases such as ammonia (NH3) and sulfur dioxide (SO2) are like enemies hidden in the dark. Once they appear, they will cause serious damage to crops and may even cause plant death, causing huge economic losses to growers.
Ammonia is mainly produced by the fermentation of organic fertilizers.In the relatively closed space of the greenhouse, when organic fertilizers are used, if the fermentation process of the fertilizer is not properly managed, ammonia is easily produced. When the concentration of ammonia reaches 0.1% – 0.8%, it will harm vegetables. It will cause serious damage to the leaves of vegetables, causing the leaf edge tissue to gradually turn brown, just like being burned by flames. Over time, the range of brown will gradually expand until the leaves die. This is because ammonia interferes with the normal physiological metabolic process in plant cells and destroys the structure and function of cells.
In some greenhouse planting areas, if high-sulfur coal is used for heating in winter or other energy needs, sulfur dioxide may be released. When the concentration of sulfur dioxide in the greenhouse is too high, it will cause cell death between the leaf margins and veins of the plant, forming white or brown spots on the leaves. These spots are like “scars” on the leaves of plants, which seriously affect the photosynthesis and normal growth of plants, and may eventually lead to the death of plants.
In order to detect the accumulation of harmful gases in the greenhouse in time, the use of gas sensors, such as ammonia transmitters and sulfur dioxide sensors, is also a very effective method.
Ammonia sensors have many excellent characteristics, such as long life, high precision, high repeatability and high stability. It can accurately detect the concentration changes of ammonia in the greenhouse, and even extremely low concentrations of ammonia can be keenly captured by it. Its long life means that growers do not need to frequently replace equipment, reducing costs; high precision ensures the reliability of monitoring data and provides growers with accurate decision-making basis; high repeatability and high stability enable it to work stably under different environmental conditions, ensuring the accuracy of ammonia concentration monitoring.
Sulfur dioxide transmitters also play a vital role in greenhouse cultivation. It is specifically used to monitor the concentration of sulfur dioxide to ensure that crops are not affected by this harmful gas. It can quickly and accurately detect the concentration of sulfur dioxide in the greenhouse. Once it detects that the concentration of sulfur dioxide has an increasing trend, growers can take timely measures to avoid causing greater damage to crops.
Greenhouse gas monitoring is of great significance. It optimizes the growth environment of plants and allows farmers to master the code of greenhouse microclimate. Moreover, these monitoring data can also contribute to scientific research and deepen our understanding of the relationship between greenhouse gases and plant growth. Although gas monitoring in greenhouse cultivation seems to be a behind-the-scenes work, it actually affects the growth and development of crops. Only by paying attention to gas monitoring, making good use of relevant systems and technologies, and paying attention to related matters can crops thrive in the most suitable gas environment and ultimately achieve a double harvest of yield and quality.
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