Water Retention Agent's Contribution to Soil Moisture
The shortage of water resources is already our consensus. How to increase the utilization of water resources is an important aspect of addressing the shortage of water resources. Increasing precipitation and irrigation water use efficiency has become one of the important research directions for agro-forestry in arid and semi-arid regions in China. The purpose of using water-retaining agents to achieve water-saving and yield-increasing purposes is a new approach and new method for the study of dry farming and forestry. Water retention agents, as the name implies, are agents that can maintain soil moisture. According to different soil conditions in different regions of China, we use different water retaining agents, but one thing is the same, that is, the role of water retaining agents is to increase the moisture content. The utilization rate delays evaporation of soil moisture. Soil moisture content is an important indicator in farmland operations. The amount of soil moisture directly determines the state of crop growth. Therefore, the determination of soil moisture is crucial. The use of water-retaining agents in the country has achieved the goal of saving water and increasing production in some areas, and has applications in the agriculture and forestry industries. Water-retaining agent is a kind of drought-resistant and water-saving material that can absorb pure water that is several times or even thousands times more than itself, and it has the ability of repeated water absorption, so it can well maintain the content of soil moisture. At this time, GPS soil moisture can be used. The speedometer measures the water retention effect of the water retaining agent. You only need to put the soil moisture meter into the area to be measured, the instrument will automatically record the corresponding data, and then the water retention effect of the water retaining agent will be obtained.
The soil water potential reflects the ability of the soil to absorb water and the supply of soil moisture to the crop. It is a relatively common reference indicator for controlling the water content. The soil water suction is the same as the soil water potential, but the sign is reversed. Soil water suction is divided into moist, dry and dry. When the soil is dry, the crop will stop growing. Within a certain range of soil moisture, the soil water suction increases with the increase of the amount of water retaining agent. Under the same water energy state, the soil moisture content increases significantly with the increase of the amount of water retaining agent, and the soil water retaining agent is used. Afterwards, the evaporation of water is suppressed, the ability to maintain water is improved, and with the increase of the amount of water-retaining agent, its water-holding capacity is stronger. Therefore, applying a suitable amount of water retaining agent can keep the soil moisture within a certain range. Soil moisture thermometers can record changes in soil moisture. In addition, soil moisture thermometer can also determine the soil temperature, atmospheric temperature, atmospheric humidity and dew point four parameters, function even more powerful than GPS soil moisture meter.
Studies have shown that the effect of water retaining agents is very effective. In the same soil water absorption, with the increase of the amount of water retaining agent, the soil moisture content also increases. Soils with water-retaining agents can effectively inhibit water evaporation, and their water-holding capacity gradually increases with the increase of the amount. The greater the amount of water retaining agent treatment, the smaller the daily change in soil moisture content, soil moisture content can be a long-term high level. Therefore, applying a proper amount of water-retaining agent will be beneficial and harmless.
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