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A portable soil moisture meter was used to measure the soil moisture in the experimental area. It was found that the average withered humidity of 0-200 cm in the test area was 70.4 g/kg, and the average water holding capacity in the field was 152.5 g/kg, which was equivalent to that in 200 cm soil layer. The maximum effective water storage is 404.9mm. The average infiltration rate in the first 1 min measured in the field using a permeation canister method can reach 12 mm/min, and after 24 min, the infiltration can be basically achieved. The infiltration rate is 1.2 mm/min. This result is close to the soil infiltration rate measured in the Loess Plateau and belongs to a better type of permeability. This is closely related to the higher content of water-stable aggregates in 0-20 cm and 20-35 cm soil layers. The soil moisture content was measured with a portable soil moisture meter. The depth was 200 cm per 10 cm layer. The moisture data of 10 positioning observation points were analyzed and analyzed, and the variation law of soil moisture in the test area was obtained.
The change of surface soil moisture content was the largest, reflecting that precipitation and evapotranspiration had a greater impact on the surface soil moisture content, and less impact on the underlying soil moisture content change. It shows that precipitation and evapotranspiration have little effect on the soil moisture in the lower layer. Changes in soil moisture in different soil layers can be described by the coefficient of variation CV. We make a regression analysis of the average value of the coefficient of variation of the soil moisture content at different observation points with the depth of the soil profile, and conclude that the coefficient of variation CV decreases with the depth as a function of power.
The portable soil moisture measuring instrument also found that fertilization has a certain influence on the change of soil moisture. The soil moisture content of phosphate fertilizer treatment is lower than that of nitrogen fertilizer, indicating that the phosphate fertilizer promotes root development and enhances the absorption of soil moisture. Use has a special role. The soil water content after fertilization was significantly lower than that of the unfertilized soil. The soil moisture content of phosphate fertilizer treatment was significantly lower than that of nitrogen fertilizer soil. After fertilization, the degree of soil water use by plants increased.
Our water tank truck equipped with self-sucking water pumps, hydraulically driven by power take off from the truck engine,a water cannon installed on top of the superstructure, the water cannon can be turned around by 360º. spray heads and nozzles could spray the water in different directions, rear mounted spray bar, operating out of driver's cab. all of our water tankers are lined with an interior coating.
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Study on Variation of Soil Moisture in Wheat Field with Portable Soil Moisture Analyzer
The combination of atmospheric precipitation, crop evapotranspiration, and soil water movement creates a dynamic variation in soil moisture. It is necessary to describe the relationship between crop water yield and fertility and moisture. For this reason, it is very necessary and very meaningful to use the portable soil moisture measuring instrument to measure soil moisture.