The real-time monitoring system of soil moisture is closely related to meteorological conditions, soil and soil water status, crop types and their growth and development. Therefore, meteorological conditions, soil physical characteristics, soil water status, crop types and growth and development can be considered. The situation is the four major elements of soil moisture monitoring. In order to meet the needs of analysis of sensation and drought, scientific management of water resources, and decision-making for drought relief, strengthening public opinion monitoring is the most important basic work for rational use of water resources, scientific management of water resources, and decision-making for drought relief. Therefore, it is imperative to increase investment in drought and soil moisture monitoring.
There are several methods for measuring the soil moisture real-time monitoring system:
Sampling period: sampling period is sampled every 8 times every month from April to October, and every 1 is reported, with an interval of 10d;
Sampling instrument: The sampling instrument should be selected one of the commonly used ones, and the observation instrument should maintain relative stability, can not change the observation instrument casually, and pay attention to maintenance and maintenance;
Soil samples should be taken: soil samples should be sampled at different depths of the same place for 3 times, each time taking 30-50g or so. Before the soil samples are loaded into the aluminum box, the residual soil in the clean box should be removed, and the soil samples should be placed in the aluminum box and tightly closed. Cover the cloth and wipe the dirt outside the box to ensure the accuracy of the soil sample. Put the aluminum box into the plastic bag to avoid the sun exposure and timely send it into the room for weighing;
Weighing of soil samples: The soil sample is weighed with a 1% balance. The soil sample must be weighed all at once, and the parts can not be divided or discarded. The weighing method is the same as the sediment weighing;
Drying of the soil sample: When the soil sample is dried, remove the lid and put it into the oven. Turn off the oven power supply at 10-110 and keep the temperature constant for 6-8h. After cooling, remove the lid and put it into the dryer to cool it to normal temperature. Weigh again.
The monitoring of soil moisture and drought has its significance, and the use of lyrics and drought monitoring is more based on the use of instruments, because the use of conventional methods can not achieve real-time, this area has soil moisture and Drought management system and soil moisture monitoring system.
From the standpoint of plant growth, the effective moisture of the soil is very important. The effective water refers to the water content of the soil. It exceeds the permanent withering point, that is, the water absorbed by the plant is the soil moisture content of the permanent withering point and the volume of the field. Many experiments have shown that if the soil water content is lower than the permanent withering point, it is not suitable for the growth of the crop. By understanding the water content in the soil and performing appropriate irrigation, the amount of irrigation can be controlled and the water resources can be used reasonably. At this time, the soil moisture real-time monitoring system can be used for operation. It can record the five parameters of soil temperature, soil moisture, atmospheric temperature, atmospheric humidity and dew point in real time, providing a scientific basis for differentiated water-saving irrigation, and precise water supply is also conducive to improving crop yield and quality.
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