The Role of Soil Moisture and Drought Monitor in Agricultural Drought Resistance

Hebei Handan is a big city with very scarce water resources. With the change of climate, the drought situation is even more serious and the scope is more extensive. The shortage of water resources has constrained agricultural development in the region. In the warmer winter, the loss of soil in the area is now more rapid, which is even more detrimental to the sowing of wheat in the area. In order to solve this problem and improve the ability of agriculture to resist drought, it is very important to monitor soil moisture in the area. Actively researching and exploring a soil moisture forecasting and water-saving anti-early mechanism, with its accurate, timely, and rapid soil moisture data, has played a very important role in correctly reflecting early occurrence and guiding agriculture. The soil moisture and drought monitoring instrument plays an important role in the control of soil moisture levels and drought conditions. Some data on soil moisture content can be accurately derived to ensure the formulation and implementation of plant protection measures.

Soil moisture has a highest, most suitable and lowest base point for crop growth. Below the lowest point, crop growth stops or even dies; above the highest point, roots suffer from hypoxia, suffocation, rot, plant growth difficulties or even death; The most suitable range, in order to maintain the crop's moisture balance, to ensure good crop growth and development. When the moisture in the soil cannot meet the needs of the crop, the crop will show a state of withered ginger. The wilting coefficient (that is, the soil moisture t when the crop is permanently withering) is the lower limit of the effective moisture of the soil, and the lack of moisture is harmful to the crop. Concentrated performance is as early as possible. The frequent occurrence of soil drought is characterized by the lack of available moisture for the soil to absorb and use. Root water absorption can not meet the needs of normal transpiration and growth of the crop. The soil moisture content falls below the wilting coefficient, and the middle loam soil is 6~8. The loam is 7-10, and the heavy loam is 9-12.

The soil moisture monitored by the Soil Moisture Monitor and Drought Monitor can correctly reflect the premature condition. According to the soil moisture content, it not only can correctly guide the anti-early, optimized scheduling, water-saving irrigation, but also provides a scientific guarantee for the successive harvest of crops. In terms of winter wheat in Handan City, past farmers believed in the harvest belief that “wheat land cannot be dried and it has been poured into wheat cultivars”. Generally, it is seven or eight years of water, and it is flooded with irrigation water. The water per mu is over 80 cubic meters. Now press Soil moisture monitoring and reporting irrigation, even in dry years, only 4 times, and irrigation water per mu less than 45 cubic meters.

Using soil moisture and drought monitoring instruments to monitor soil moisture can not only save water resources greatly, but also increase the yield per mu as much as possible. The monitoring and harvesting situation of Handan City will be used to analyze if the whole city will use 10,000 mu of cultivated land. With the addition of soil moisture monitoring points, the annual savings of 2.5 billion cubic meters of water can be equivalent to the construction of a large-scale reservoir (120 million cubic meters of Dongwushi Reservoir in Handan City). This is only the water saving effect of winter wheat. Cotton also implements soil moisture monitoring and watering, and it will also receive significant water-saving effects.

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