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Soil moisture dynamics can be divided into interannual changes of alternating wet and dry and vertical changes between the upper and lower layers. Tests are conducted on sampling, and the test sites are representative agricultural bare lands. Soil drilling is used on the 1st, 10th and 20th of each month. Sampling, repeat 3 times. The depth of soil taken is 0^-20,20}40,40}60,60}80,80}100cm, placed in an aluminum box of known weight, and the moisture content of the soil is measured by a drying method.
Using a soil moisture analyzer to measure the moisture content of thin-soil soils, it was found that the seasonal variation of soil moisture in agricultural land with thin sandy soils is: the seasonal dynamics of soil moisture can be divided into relatively stable soil moisture, slow soil moisture consumption, and soil Large amount of moisture loss and soil moisture recovery period. And these four periods are consistent with climate change. The vertical variation of soil moisture in agricultural lands with thin sandy soils is characterized by: the water level in the cultivating layer is quite drastic, the water content is low, and it is extremely unstable; the water content in the soil and soil layers is higher than that in the plough layer, and the soil moisture conducts fast, and the wet and dry changes greatly. Affected by rainfall, drought has a greater influence on it; soil moisture in the subsoil is higher than that in the tillage layer and the soil and soil layer, and it is relatively stable and has a relatively abundant water content. Sand and thin soil has low moisture content in spring and early summer, and during this period, the amount of precipitation is small and the amount of evaporation is relatively large. It is the booting and heading date of winter wheat in the region, which requires more water, and it must be properly implemented in order to adapt to high quality and high yield. irrigation. In the autumn, the soil moisture content changes frequently. When drought occurs, besides irrigation, it should be supplemented by deep ploughing, organic fertilizer application, fertilizer transfer, straw mulching, etc. to increase the capacity to accept summer and autumn rain and help prevent drought. .
Soil Moisture Analyzer for Determining Soil Moisture Content in Sha-Bei Area, Henan Province
Soil moisture is a key factor in soil-plant-atmosphere, and it is also a carrier of soil nutrient changes, which directly affects the characteristics of soil and the growth of plants. It also indirectly affects the distribution of plants. In particular, the key to the production of agricultural production in arid areas is the state of soil moisture. The thin sand land is widely distributed in Henan Province, and is also the main grain production area in Henan Province. The bare agricultural land in the village of Baqian Village of Baqian Town of Xinzheng City in central Henan Province is taken as the research object to analyze the dynamic change process of farmland soil moisture in order to determine the farmland. The optimization of water regulation and rational allocation of soil and water conservation measures provide theoretical basis for the more effective conservation of soil moisture in the region and improve soil moisture in farmland and improve soil water use efficiency of farmland has important guiding significance. The condition of soil moisture was measured using a soil moisture meter.