Water is a key factor for restricting vegetation construction on the Loess Plateau. Soil depth, depth of groundwater, and plant use are more difficult. The water needed mainly comes from soil moisture, which is an important factor in the balance. Water and soil resources have received widespread attention. . Soil moisture is usually defined as the non-saturated portion of moisture, and the key factors affecting the structural integration of soil, climate, and vegetation with respect to the dynamics of the water cycle and the water cycle. The portable soil moisture temperature rapid measurement instrument determines that soil moisture has important influence on vegetation type and structure, ecological construction of plant growth, soil erosion and vegetation restoration.
Seasonal dynamics of soil moisture in forest land in the gully region of the Loess Plateau can be divided into relatively stable soil moisture at the beginning of the growing season, strong soil water consumption during the growing season, compensation for soil moisture during the growing season, and slow evaporation of soil moisture at the end of the growing season. Stages. The portable soil moisture temperature rapid measurement instrument to study the dynamic changes of soil water availability on the slope surface found that in winter and early spring soil moisture was only slightly deficient, and in June, July and August, soil moisture was seriously deficient.
The portable soil moisture temperature quickness tester found that the seasonal and vertical variations of soil moisture in different rainfall years were significantly different. The seasonal variation of soil moisture content in each year was a concave curve. The seasonal variation of soil moisture in normal precipitation years was a W-shaped curve; the soil moisture dynamics in general years could be divided into three periods: the soil in late spring and early summer. Water consumption period, soil moisture accumulation period in late summer and early autumn, and soil water consumption period in late fall and early winter. The characteristics of the time variation of soil moisture in the Loess Plateau show that the type of year and the aspect of the land use in dry years have a greater influence on the soil moisture, while in the wet years, the degree of influence decreases.
As an important portable soil moisture temperature measuring instrument in soil instruments, it is important to analyze and use the spatial and temporal differences of soil moisture. Multi-scale analysis is the result of various environmental factors, and different scale factors affect the spatial and temporal differences of soil moisture. Qualitatively large spatial changes and temporal changes. The spatial structure characteristics of soil moisture and its seasonal changes in land use, terrain, rainfall, and the relative physical effects of soil physical properties are different.
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