There are many factors that cause changes in soil moisture, but time is certainly one of the most important factors. Soil moisture has many differences at different times of the year. Soil moisture can be measured using a soil moisture temperature recorder. Soil moisture temperature recorder is not only Soil moisture can be measured and moisture temperature can also be measured. Here's to talk about the law of soil moisture changes in different months.
The degree of soil water deficit in June-July and October-November showed an increasing trend. The soil moisture in the upper, middle and lower layers was slightly deficient, which was related to the water loss in the soil. In the month of July, the amount of solar radiation increased, the amount of evaporation increased, and there was no significant increase in rainfall, so the water deficit was more serious. In October-November, due to less precipitation, the amount of water infiltration decreased, leading to an increase in soil water deficit.
As far as different soil layers are concerned, their water suction force changes with time and also has a different range of variation. The upper soil was affected by the extent of evapotranspiration in different months of the year, and the moisture content was the most obvious. The water suction was very poor at 13.5 kPa during the year, of which the soil water suction reached a maximum of 15.8 kPa in July and reached a minimum of 4. 5 kPa in December. . The water suction in the middle and lower layers did not change significantly. The middle layer of soil showed only a slight deficit in June and July, and the annual range was 5. 4kPa.
The underlying soil has always been characterized by a slight deficit, which is exacerbated in June and July. It is related to soil water consumption and runoff characteristics. The infiltration of the underlying soil is less, and the amount of solar radiation is also less. Evaporation The amount is small, the runoff is not active, and the fluctuation of the water change is small. For soil and water conservation plants, the slight deficit of soil moisture will not affect its growth, but observation should be strengthened in the season when the growth is strong and the degree of soil water deficit is relatively high, and the necessary water supplement measures should be taken in time.
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