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The landform types are loess hills covered with sand and sand. The main soil types are cotton sand, hard loess, red clay, aeolian sand, and dam silt. Vegetation types belong to the shrub grassland type. Most of the natural vegetation has been destroyed and artificially remedied. Gradually, the vegetation succession stage, which is dominated by S. bungeana-P. vulgaris, D. dauribreviflora, Artemisia and Artemisia ordosica, has gradually entered. In each sampling point, an earthen borer was used for stratified sampling. The depth of 0 to 10 cm soil layer took a sample every 5 cm, the depth of 10 to 60 cm soil layer took a sample every 10 cm, and the soil was determined by drying method (105e, 10 h). Water content. Agricultural land management is general field crop management; grassland vegetation is ploughing 35 to 36 years from the farmland and basically reduced to S. bungeana. At the same time, portable GPS and compass are used to determine the terrain factors such as slope, aspect and altitude of each sample.
Soil moisture tester After measuring the soil moisture in this area, we can find that diversification of land use patterns on slope land increases the coefficient of variation of soil moisture. Land use structure change is one of the most critical factors leading to soil moisture variation. There is a clear spatial structure for soil moisture in the mixed use of agricultural grasses. Under dry conditions, the average water content in the 0-60cm soil layer maintains a relatively high base station value and range, while the nugget/abutment ratio is relatively low, and they are significantly different with the soil profile distribution, which further explains Different climatic conditions, such as rainfall, can change the variation degree and distribution pattern of soil moisture. In the study of spatial variation of water, different sampling designs should be adopted according to the average water content.
Soil Moisture Analyzer for Analyzing Spatial Variability of Soil Moisture
The main limiting factor for the growth of vegetation on the slopes of the Loess Plateau is soil moisture, and there is a certain spatial variability in the soils of the Loess Plateau. In the middle, it is the rational allocation of vegetation and the basis for improving soil reservoirs. In order to accurately conclude the relevant conclusions, we chose the slopes of mixed agro-grasses in the Loess Plateau and studied the spatial structure of shallow soil moisture and its distribution characteristics under humid and arid conditions, in the hope of restoring vegetation and ecological construction in the Loess Plateau. Provide theoretical reference. The soil moisture content can be measured and analyzed using a soil moisture tester. The results obtained are very accurate and effective.