Early Spring Farming Guide: Rainwater and Pipe Soil Moisture Monitor
Rainwater originated from the twenty-four solar terms in the Yellow River basin in my country, and has been used as a guide for daily life and agricultural production since ancient times. Among them, the rainy solar term that comes in mid-February every year announces that the cold and snowy winter in most parts of the country has passed, and the rainfall has begun and gradually increased, which has an important impact on agricultural production.
Rain has two meanings. One is that the weather is getting warmer and the amount of precipitation is gradually increasing. The other is that in the form of precipitation, the snow is getting less and the rain is getting more. The "Moon Order 72 Hou Ji Jie" says: "In the first month, there is water in the sky. Spring is the wood, but when the wood is born, water will flow, so the rain will follow after the beginning of the spring. And the east wind has thawed, then it will disperse and become rain. Come on." In China, winter wheat is gradually turning green.
In the rainy season, big wheat begins to enter the jointing and booting stage, which is the time when fertilizer is most needed and the most afraid of water. There is a saying that "inch wheat is not afraid of water, but it is afraid of water". We must pay attention to "strengthen the area and watch the seedlings." Field management of “fertilization, clearing of ditch and drainage”. Winter warmth often breeds spring cold. The rainy solar term coincides with the transitional season of late winter and early spring. The cold and warm are changeable. Wheat is susceptible to low temperature damage, so it is necessary to take anti-freezing measures such as soil cultivation and fertilization.
Among them, "inch wheat is not afraid of water, but it is afraid of water". Literally understood: an inch of wheat is not afraid of a foot of water, but a foot of wheat is afraid of an inch of water. In the current agricultural production, the wheat seedling stage is not afraid of water. In the north, the winter wheat planted must be winter irrigated during the winter. After winter irrigation, it can not only add water to promote wheat growth, but also increase the ground temperature to ensure the safe overwintering of wheat. However, after the wheat grows up, jointing and heading are afraid of water. After the wheat plants grow up, the branches and leaves are luxuriant, the growth density is high, and the air permeability near the ground is very poor. If at this time, the field is expanded. Water irrigation/heavy rain irrigation, increased humidity, on the one hand, may cause the appearance of diseases, such as root rot, sheath blight, etc. At this time, because the wheat plants are relatively high, it is particularly difficult to control; on the other hand, soil moisture Large, loose soil, it is easy to cause wheat lodging in extreme weather. Therefore, when the wheat seedlings grow up, they may be afraid of water. But this does not mean that the wheat cannot be watered at the later stage of growth, and growers must manage the wheat growth and weather conditions.
In order to better monitor the growth of wheat and soil moisture, Jianda Renke launched a tubular soil moisture monitor (RS- WS-*-TR-3), which adopts a layered observation structure, which can detect the soil temperature and moisture content of the lowest 3 layers or the highest 5 layers. Configure a temperature observation point on the ground, and configure a soil temperature and humidity measuring point every 10 cm in the underground soil to observe the soil temperature and humidity in the corresponding range. There are two signal output modes: RS485 and GPRS/4G. It supports 10-30V wide-voltage charging or built-in battery charging. It can quickly and multi-faceted understand and collect soil moisture information, provide decision-making support for correct command of drought and disaster relief, and minimize disasters loss.
Compared with ordinary soil moisture monitors, the tubular soil moisture monitor has the following special advantages:
1. The monitor emits a high-frequency detection wave of nearly 1G Hz, which can penetrate the plastic pipe and effectively sense the soil environment.
2. The electrode will not directly contact the soil, which can effectively avoid the interference of electricity on the soil and the plants in the soil.
3. It has a good protective effect on the circuit, so that it is not affected by the salt ions in the soil, nor is it affected by agricultural activities such as chemical fertilizers, pesticides, and irrigation, so that the monitoring data is more accurate.
4. The shell has a fully sealed structure and the waterproof grade is IP68, which can be placed in the field soil for uninterrupted measurement for a long time.
The tubular soil moisture monitor uses a shell made of PVC plastic pipes to protect the sensor’s electrodes from direct contact with the soil. During monitoring, it can effectively avoid the interference of electricity on the soil and the plants in the soil, and also make the detection wave free from soil salt. The impact of ions, chemical fertilizers, pesticides, irrigation and other agricultural activities can effectively perceive the true state of the soil and ensure the accuracy of the data.
The tubular soil moisture monitor combines the advantages of the catheter type and the pin type, and makes up for their shortcomings. With the characteristics of high precision, good stability and minimal soil disturbance, it is simple to install and does not require manual maintenance. It can support a wide range of application scenarios and is widely used in places such as weather monitoring, agricultural moisture, and water storage and diversion of water conservancy projects.