Soil moisture evaporation is the process by which soil moisture enters the atmosphere through the surface of the soil, gradually reducing soil moisture and gradually drying the soil surface. Soil evaporation is a very important process of soil moisture balance and has a close relationship with crop production. There are many studies on soil moisture evaporation by soil moisture testers, and the research focuses mainly on the effects of vegetation conditions, cover patterns and cultivation methods on soil moisture evaporation characteristics.
Using the soil moisture tester to analyze the total fluctuation of mean soil moisture at different depths of different cover tillage patterns, we can see that the fluctuation process of soil moisture with time at different depths of different cover tillage patterns is not the same, but the soil moisture at different depths for different tillage patterns varies with time. The overall trend of fluctuations is consistent, that is, changes in the trend of double peaks and double valleys.
After 4 to 5 years of greenhouse soil planting, the bulk density of surface soil increased, and then with the extension of planting time, the bulk density continued to increase but the increase decreased. The increase in bulk density makes the topsoil compact, resulting in changes in the pore characteristics within the soil, affecting the water retention performance. The change trends of the water evaporation rates of the two treatments in the soil moisture tester test were basically the same, and all had three obvious phase characteristics.
Higher evaporation rate and longer evaporation duration make the loss of soil moisture greater during this period, which is the main stage of soil moisture loss. The soil moisture tester found that in this stage, the moisture loss of the compacted soil was higher than that of the loose soil, and the cumulative water loss of R1.2 and R1.5 was 20.2 and 26.0 mm, respectively. The rate of evaporation of soil moisture during this period mainly depends on the ambient temperature and the relative humidity of the air, while the nature of the soil is a secondary factor.
Using the soil moisture tester to analyze the total fluctuation of mean soil moisture at different depths of different cover tillage patterns, we can see that the fluctuation process of soil moisture with time at different depths of different cover tillage patterns is not the same, but the soil moisture at different depths for different tillage patterns varies with time. The overall trend of fluctuations is consistent, that is, changes in the trend of double peaks and double valleys.
After 4 to 5 years of greenhouse soil planting, the bulk density of surface soil increased, and then with the extension of planting time, the bulk density continued to increase but the increase decreased. The increase in bulk density makes the topsoil compact, resulting in changes in the pore characteristics within the soil, affecting the water retention performance. The change trends of the water evaporation rates of the two treatments in the soil moisture tester test were basically the same, and all had three obvious phase characteristics.
Higher evaporation rate and longer evaporation duration make the loss of soil moisture greater during this period, which is the main stage of soil moisture loss. The soil moisture tester found that in this stage, the moisture loss of the compacted soil was higher than that of the loose soil, and the cumulative water loss of R1.2 and R1.5 was 20.2 and 26.0 mm, respectively. The rate of evaporation of soil moisture during this period mainly depends on the ambient temperature and the relative humidity of the air, while the nature of the soil is a secondary factor.
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