Soil Moisture Velocity Tester Study on Forest Soil Moisture

Land moisture is one of the necessary environmental factors for forest growth and development. The vast majority of forest tree water use absorbs soil moisture through the root system. Due to the availability of land moisture supply, it has become a constraint to the growth and survival of forest trees. In turn, various engineering measures affect the changes in soil moisture. The soil moisture quickness meter is an instrument for measuring the moisture in the soil, and its measurement speed is very fast, which saves a lot of time in the research process.

The influence of rainfall on the seepage of land moisture was studied under the condition of exclusion of seepage phenomena. It shows that the depth of water infiltration of the forest land of the Robinia pseudoacacia forest does not exceed 17 ocm when the rainfall is less than the La-free soil, and the depth of infiltration will increase with the increase of rainfall. Exceeding the intestinal ocm; the rainfall, the early soil moisture content and the infiltration duration showed a good linear relationship with the infiltration depth. The establishment of the soil moisture model of human seepage through the model to draw the profile of the water content changes with time during the infiltration, can visually reflect the human infiltration process of different soil moisture. According to the model finding of the similarity of water infiltration of soils in six different forest lands, the initial infiltration rate of different forest lands was between 0.3 and 0.5 c, but the initial infiltration rate of shrubs and bare land was higher than that of arbor land. The accumulating people in the arbor woodland have large infiltration. The infiltration of the woodland on the shady slope is faster than that on the sunny slope, and the trees are resting faster than the wet peaks of the shrubbery and bare land. At the same time, the soil bulk density of the mixed forest decreased, the hardness decreased, and the infiltration rate was also higher than that of the pure forest.

In addition to the influence of evaporation factors, the soil moisture content of slope farmland is also affected by the topography, slope, distance from the watershed of the measurement point, precipitation, rainfall intensity, soil utilization patterns, and month. The soil moisture content of slope farmland decreases with increasing slope. The influence of slope length is more complex. The soil moisture content is the longest (9O&) from the water depth of 30m, and then the soil moisture content decreases with the increase or decrease of the slope length. Under simulated rainfall conditions, the study showed that the change of soil moisture content on the slope surface (0 to 10cm) showed a wavy upward trend from the top of the slope, and the fluctuation wavelength.

According to the study of the soil moisture quickness tester, the principle of soil moisture on plant growth efficiency, soil moisture in terms of the moisture content of retarded moisture growth retardation and field water holding capacity was analyzed in subtropical Pinus massoniana forests, when the soil moisture content fell to the field. When the water holding capacity is below 60Ofo and 70%, there is a water deficit. For plant growth, when the soil moisture content is 600 to 80% of field capacity, it is medium effect water, 80% to 10% of the water is effective water, and less than 60% is difficult water.

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