One is the introduction of new instruments for detecting soil water potential.

One is the introduction of new instruments for detecting soil water potential.
Soil moisture is an essential condition for crop growth and development, which affects the absorption and utilization of nutrients by crops. Therefore, rapid and accurate measurement of soil moisture, profit and loss of soil moisture for crop growth and development of proven period, make timely irrigation, fertilization decision-making is important. Soil water potential is the strength index of soil moisture, and its size is closely related to the mobility of soil water and the effectiveness of the plant. Methods for measuring soil water potential include centrifuge method, pressure membrane method, filter paper method, and dew point microvoltmeter method. The measurement results of these methods are not very accurate, the following describes an accurate measurement method - digital tension meter method.
Digital tension meter TRS-1 can not measure temperature, 3 probes. The soil water potential can be detected and observed in the field, and soil water parameters such as soil moisture and hydraulic conductivity can be further obtained. This instrument is portable and easy to carry outside to operate, and it is convenient to operate. It can automatically capture the peak water potential function, which is more convenient for us to observe and understand the change of soil water potential. When recording the soil water potential, we can record the temperature, water potential, time, and storage serial number at the same time. Let us understand the change of soil water potential in different periods. course. In the absence of operating display keys, the monitor automatically shuts off after 10 minutes to reduce the waste of power.
Is the number of significant tension in accordance with principles of conventional tensiometers, soil water potential was measured using a method of combining a plurality of sensor probes water potential, the measurement accuracy which can be achieved ± 1KPa. Water filling the sensor cavity during measurement helps improve measurement accuracy. It can be used to locate the observation of soil water potential, groundwater depth, and can further obtain hydraulic properties such as soil moisture characteristics and hydraulic conductivity. But during the time of measurement can damage plant roots, and to carry out regular maintenance of the equipment to ensure the life of the instrument as well as the accuracy of the measurement.

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