Terraced soil moisture changes
Terraces are stepped farmlands segmented along contour lines on slopes. It is an effective measure to control soil erosion in slope farmland, and it has significant effects on water storage, soil conservation and production increase. The terraces have better ventilation and light transmission conditions, which are conducive to crop growth and the accumulation of nutrients. There are four main types of terraces: terraced terraces, compound terraces, back-slope terraces, and terraces. In China, terraces are mainly distributed in the Jiangnan Mountains, and Guangxi and Yunnan are mostly located in these areas. This is because these places have more rain and mountains and terraces are built on mountains. Since the terraces have such good water storage capacity, the inside of the terraces How does the soil moisture change? In the process of detecting soil moisture changes, a soil moisture analyzer is used to measure, and at the same time it is necessary to monitor other factors in the environment, such as rainfall monitoring, to conduct further analysis and understand the law of change. Reasons for change.
Through the analysis of soil moisture analyzer, it was found that the relatively large changes in the soil moisture in the terraced fields were due to precipitation, which was the biggest cause, and did not rule out various factors in the environment. Such as the evapotranspiration of plants. Rainfall is the most direct source of soil moisture, as well as groundwater and so on. Soil moisture has a great influence on plants. Water is the source of life. Therefore, only by ensuring sufficient soil moisture can the plants be better developed. In addition, the amount of soil moisture will also have a certain impact on the soil temperature. At this time, we need to use a portable soil moisture temperature measurement instrument. This instrument is a multi-function test that can measure soil moisture while measuring soil temperature. So it is very convenient.
The soil drought monitoring system was used to monitor and analyze the soil moisture in different locations of the terraces. It was found that the soil water content in the inner, middle, and lateral soils of farmland with wide terraces decreased gradually from the inside to the outside. The average decline rate was 4 mm/m, and the storage rate deviation rate It is 25%, and when the soil water storage is higher than 60% of field capacity, the deviation is greater. In the narrow terraces on the hillside, the changes of soil water content in the inner and outer soils are not significant. If we compare the wide terraced fields with the narrow terraced fields, it can be clearly seen that the total storage capacity of the narrow terraced terraces is 306.7 mm, which is equivalent to 90% of the wide terraced terraces. It is the same as the outer edge of the wide terraced terraces and belongs to the soil moisture. Lost area.
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