How soil temperature and humidity sensors help crops survive the cold wave
According to a report from the China Meteorological Administration, in the next 10 days, cold air activities will be frequent, and the temperature in most parts of the country will be 1~2℃ lower, and some areas will have 6~8℃ cooling. All localities need to be aware of the impact of strong wind cooling on facility agriculture. Reinforce the sheds and keep warm in advance. The cold wave has not subsided recently, and the continuous low temperature has adversely affected the growth of crops, even if it is planted in greenhouses. Greenhouses have been the focus of agronomic research and agricultural production in recent years. The main function of greenhouses is to increase the temperature so that the temperature in the shed reaches a temperature suitable for plant growth, but in fact, room temperature ≠ soil temperature. Suitable does not mean that the soil temperature is suitable. The roots of plants take root in the soil. If the soil temperature is too low, it will affect the root respiration activity, nutrient absorption and related enzyme activities, and inhibit plant growth. In the soil around plant roots, the increase in temperature will increase the activity of enzymes in the soil and promote the conversion of nutrients in the soil. Therefore, it will increase the consumption of soil organic matter, increase soil respiration, emit carbon dioxide, and affect crop growth; Methane, nitrous oxide and other greenhouse gases are emitted, which not only consumes soil nutrients, but also has a certain negative feedback effect on the temperature in the greenhouse. Therefore, not only the growth of crops needs to pay attention to the temperature and humidity of the soil, but also the monitoring of the temperature and humidity in the shed. We all know that in the greenhouse, we can use wall-mounted temperature and humidity sensors to monitor the temperature and humidity in the environment in real time as the basis for regulation, so as to provide a suitable growth environment for the crops in the greenhouse. How to monitor the temperature and humidity? The traditional method of measuring the temperature and humidity in the soil is to use a soil thermometer to measure the temperature of the soil, and then take the relative component of the soil and use the drying method to measure the soil humidity to obtain accurate soil temperature and humidity data. However, for ordinary growers, lack of corresponding equipment, they can only regularly sample the soil and send it to relevant research institutions for testing, which is time-consuming and labor-intensive. Nowadays, with the development of sensor technology, the soil temperature and moisture sensor integrates soil temperature and moisture measurement with simple operation. There are two measurement methods: rapid measurement method and buried measurement method. Quick measurement method: Select a suitable measurement location, avoid rocks and similar hard objects, create surface soil according to the depth required for measurement, insert the sensor needle vertically into the soil and wait for the result. Buried measurement method: Vertically dig a pit with a diameter of about 20cm. The depth is determined according to the measurement needs. After the sensor is inserted horizontally into the pit, the soil is filled and compacted to ensure that the steel needle is in close contact with the soil, and the sensor is stable. Measure and record the soil temperature and humidity values u200bu200bfor a long time. Note: When using the soil temperature and humidity sensor, the steel needle must be completely immersed in the soil to avoid data errors caused by the temperature and humidity in the shed or sunlight. The soil temperature and humidity sensor can also be connected to the intelligent environmental monitoring system of the greenhouse, and upload the data to the environmental monitoring software in real time, so that the manager can combine various environmental factors to determine whether the crop needs to be heated, watered, and fertilized. To deal with the impact of changes in the environment inside and outside the shed on the crops in the shed,With the country’s emphasis on agriculture and the deepening of agronomic research, soil temperature and humidity will gradually be included as a necessary factor in agricultural management. The application fields of wet sensors are no longer limited to scientific experiments, water-saving irrigation, greenhouses, horticulture and other fields. They have gradually expanded to the measurement of water content and temperature of more particulate matter such as tea gardens, grass pastures, and food storage. The monitoring of soil temperature and humidity can better serve agricultural production.
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