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The Songliao Plain is home to many sand dunes and ravines. Due to regional monsoon and arid inland transition zones, the ecosystem is also in a transitional state from semi-humid forest steppe to semi-arid steppe and desert. It is responsible for abnormal climate changes and human activities. The impact reaction is extremely sensitive. Due to the long winter season in Jilin Province, although there is partial snowfall recharge, the soil moisture gradually dissolves in the spring after a winter condensation. Under the action of meteorological conditions, the soil moisture evaporates gradually and the soil moisture content decreases rapidly, resulting in the formation of drought conditions. The soil moisture meter is an important instrument for measuring soil moisture. The result is accurate and reliable, and it is an important instrument for modern soil research.
After several years of soil moisture monitoring by the soil moisture meter, it was found that in the central and western parts of Jilin Province, the soil moisture content gradually decreased from east to west. In the most serious areas in the west, it was difficult to reach the minimum moisture required for crop growth, resulting in individual cities, counties, and individual In the year, there was a phenomenon of agricultural failure. With the development of drought conditions, the area of ​​drought has gradually expanded to the central economic belt and formed a large area of ​​drought.
Soil moisture content can reflect the size and extent of soil moisture changes, and can be used as an indicator to determine soil moisture. The change in soil moisture content depends on changes in meteorological conditions. The main factors that determine the change in soil moisture content are precipitation, temperature, evaporation, ground temperature, relative humidity, saturation difference, wind speed, and sunshine. There are several major factors for analysis.
The results of the soil moisture meter show that the temperature has an important effect on soil moisture changes by affecting the evaporation of soil moisture. In the winter, when the soil surface is frozen, the surface of the soil is frozen. After the soil is frozen, the loss of soil is relatively slow. In the spring, the temperature of the frozen soil melts as the temperature rises. During this period, the soil moisture evaporates slowly, and the deep water can maintain stable upward migration. The flooding occurs when the crop water requirement is small. The soil moisture content basically meets the crop growth needs; after the early spring, the temperature further rises, the surface water evaporates strongly, the crop transpiration is enhanced, and the precipitation is scarce during the season. Soil moisture Losses increase, often resulting in inadequate or severe shortage of moisture, prone to moderate or severe drought, and extreme droughts can be achieved in individual years.
After several years of soil moisture monitoring by the soil moisture meter, it was found that in the central and western parts of Jilin Province, the soil moisture content gradually decreased from east to west. In the most serious areas in the west, it was difficult to reach the minimum moisture required for crop growth, resulting in individual cities, counties, and individual In the year, there was a phenomenon of agricultural failure. With the development of drought conditions, the area of ​​drought has gradually expanded to the central economic belt and formed a large area of ​​drought.
Soil moisture content can reflect the size and extent of soil moisture changes, and can be used as an indicator to determine soil moisture. The change in soil moisture content depends on changes in meteorological conditions. The main factors that determine the change in soil moisture content are precipitation, temperature, evaporation, ground temperature, relative humidity, saturation difference, wind speed, and sunshine. There are several major factors for analysis.
The results of the soil moisture meter show that the temperature has an important effect on soil moisture changes by affecting the evaporation of soil moisture. In the winter, when the soil surface is frozen, the surface of the soil is frozen. After the soil is frozen, the loss of soil is relatively slow. In the spring, the temperature of the frozen soil melts as the temperature rises. During this period, the soil moisture evaporates slowly, and the deep water can maintain stable upward migration. The flooding occurs when the crop water requirement is small. The soil moisture content basically meets the crop growth needs; after the early spring, the temperature further rises, the surface water evaporates strongly, the crop transpiration is enhanced, and the precipitation is scarce during the season. Soil moisture Losses increase, often resulting in inadequate or severe shortage of moisture, prone to moderate or severe drought, and extreme droughts can be achieved in individual years.
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