The variation and loss of soil moisture is a problem that must be considered in agricultural production. Soil moisture measurement data is often not accurate or realistic due to human judgment. Therefore, soil temperature and humidity recorders and soil moisture analyzers are good for determining soil moisture. Helper. Today we use a soil temperature and humidity recorder to determine the variation of soil moisture in Gansu and discuss it as follows.

1. In the vertical direction, the soil moisture content of Populus euphratica in Suwu Township and Secko Township increased with the increase of soil depth; the soil moisture content in Jiahe Township increased first and then decreased with the increase of soil depth; The water content in the surface soil of the area was low, ranging from 0.85% to 3.4%. The soil water content of Populus euphratica under different tree ages was different, and negatively correlated with DBH.

2. During the growing season of Populus euphratica, the change of soil water content in the study area was generally as follows: spring> autumn> summer.

3. From the coefficient of variation of soil water content, it can be seen that the variability of soil water content at the sampling site is moderate intensity variation, and it first increases and then decreases with the increase of soil depth.

4. The structural variance ratio indicates that the soil water heterogeneity in the study area is moderately spatially correlated, and the spatial heterogeneity of the soil is gradually enhanced from top to bottom. The fitting function of the Suwu Township plot variate function model is the most ideal.

5. The soil moisture content of the natural Populus euphratica forest in Minqin County is between 0.85% and 4.8%. Compared with the Ejina Delta and the Shahu region in the Ningxia Autonomous Region, the soil moisture content in this area is relatively small.

Therefore, the rational development and utilization of Minqin Oasis water resources and the way of sustainable development are particularly important for improving the habitat of Populus euphratica, preventing land desertification and ecological restoration.

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