Through the portable soil moisture quickness tester, the soil moisture content in the sample plot I was between 8.29% and 23.29%, with an average moisture content of 14.48%. After the soil and water conservation measures were taken, the soil moisture content of sample plot II was From 9.03% to 26.01%, the average water content was 17.15%, which only increased to a certain extent compared to the plot I, but did not reach a significant level (P>0.05). The soil moisture in sample plot II planted along the slope in 1996 was between 9.57% and 25.73%, and the average water content was 16.79%, which was not significantly different from plot I and plot II (P>0.05); after soil and water conservation measures were taken Soil water content of plot IV increased significantly (P<0.05), its moisture content was between 10.59% and 29.27%, and average water content reached 20.20%. The test results show that the soil moisture status of the plots has been improved to a certain extent after the adoption of soil and water conservation measures, especially with the prolonged duration of soil and water conservation measures, which has a more significant effect on the spatial and temporal distribution of soil moisture.
Soil and water conservation measures can lead to changes in the micro-topography through land preparation and construction of ravines, artificially creating “small reservoirs†with the ability to collect water, and accumulating moisture temporarily in order to achieve the purpose of air-conditioning and moisture control [C37. The results of this study showed that the implementation of soil and water conservation measures played a certain role in the improvement of soil moisture in plots, especially with the extension of the application period of soil and water conservation measures, its impact on the spatial distribution of soil moisture was more significant. This is similar to the findings of other scholars. For example, when studying the effect of soil moisture under soil and water conservation measures in terraced fields in the Loess Plateau, it is believed that in the terraces with good fertility conditions, the water holding capacity of the topsoil is also increased with the extension of terrace years. It has been enhanced; the water storage performance and water use efficiency of terraces have increased with the extension of the farming years.
A portable soil moisture meter was used to determine the soil moisture content after soil and water conservation measures were taken. It was found that the effects of soil temperature and soil moisture on soil respiration rate were enhanced to some extent. This is mainly due to the adoption of soil and water conservation measures to improve the soil moisture status, structure and soil organic matter mass fraction, adequate water and suitable soil structure, will provide a more favorable living environment for the decomposition of soil microorganisms, make soil Respiratory responses to abiotic factors (mainly temperature and humidity) become more pronounced.
Severe erosion of the soil will lead to a large loss of soil organic carbon pools, and reduce the quality of the soil; therefore, soil and water conservation measures as a measure to maintain soil fertility are widely used in areas with severe soil erosion. At present, the research on the effect of soil and water conservation measures on soil is still confined to the changes of soil structural characteristics, soil reservoirs and carbon pool effects, etc. There are relatively few studies on soil carbon emissions and their response mechanisms; therefore, the selection of soil erosion Different types of chestnut forests in northwestern Hebei Province in severe areas were studied. The differences in soil moisture content and seasonal dynamics of soil respiration during soil and water conservation measures were compared and analyzed. Seasonal dynamics of soil respiration and soil temperature were also discussed after soil and water conservation measures were taken. The changes in the effects of humidity on soil respiration provide technical support for the assessment of carbon sequestration patterns in areas with severe soil erosion. The portable soil moisture meter can conveniently and accurately measure the water content in the soil, providing a reliable and favorable reference for research.