Soil moisture measurement data for soil moisture in 0-4m soil layers of 25-year-old artificial pine forest in different precipitation years for different planting densities can be seen that, in normal precipitation years, afforestation density has little effect on soil moisture, but In the lower water year, the soil moisture in high-density planted pine forests was significantly lower than that in low-density pine forests. This shows that the effect of afforestation density on soil moisture in forest land is more pronounced in the lower water year.
The results of the above-mentioned soil moisture analyzer indicate that the soil moisture status of the forest land can be adjusted by selecting a certain afforestation tree species and planting density. It is feasible to adjust artificial soil ecosystem water level by artificial measures under certain conditions. Forest species also have a certain influence on soil moisture. In the same precipitation area, the soil moisture content of different forest species has certain differences under basically comparable conditions.
The difference was 0.58% to 2.77% for the soil moisture analyzer. Under completely comparable conditions, the artificial water and shrub lands were slightly worse than the wasteland, with a difference of 0.43% to 2.37%. At the same time, the impact of afforestation density on soil moisture in forest land is also obvious. Appropriately reducing the afforestation density can reduce the transpiration water consumption and improve the soil moisture status of forest land. In the vegetation construction on the Loess Plateau, we must not only pay attention to the regional differences in soil moisture, but also pay attention to the rational allocation of different forest types and slopes and the planting density.
The water content of soil in the 2-h shrubs of the seabuckthorn under the gully slope was 14.79% and 7.27% (probably) and 9.21% and 5.42% (November) higher than the top and middle parts of the slope. Soil Moisture Analyzer's analysis of soil water content in different slopes not only relates to local rainfall and plantations, but also relates to factors such as slope length and slope length. There is no significant difference in soil moisture content between shrubs and mid-lower shrubs, which may be related to small short slopes and slopes. The relationship between slope and slope length and soil moisture remains to be further discussed.
The soil moisture status of artificial forest lands is the result of tree-atmosphere-soil interaction. Under the same climate, soil and stand conditions, the afforestation density has a certain influence on the soil moisture status of the forestland. Soil moisture content of high density and low density Amorphophallus forestland was 6.91% and 8.93%, respectively. The soil moisture content of the former was 2.02% lower than that of the latter, apparently due to the fact that the water consumption of high-density forest was greater than that of low-density forest.