Digital multichannel acquisition instrument of plant moisture evaporation and soil leakage

Abstract

The invention relates to a digital multichannel acquisition instrument of plant moisture evaporation and soil leakage. The instrument is characterized in that a soil containing barrel is filled with original soil, a sand filtering layer is disposed under the barrel. A soil water leakage nozzle is disposed under the soil containing barrel and is communicated with a soil water leakage recording gauge. A runoff nozzle is disposed on the upper part of the soil containing barrel and at the surface of soil and is connected with a runoff pipe and a runoff recording gauge through an outlet nozzle. A plurality of weighing sensors are arranged under the soil containing barrel, are supported by a plurality of sensor supporting apparatuses and are arranged in a weighing underground chamber. A host data memory is connected to the weighing sensors through signal wires and power supply is achieved through a weighing transmitter and a high-precision power-supplying bridge device. A multichannel data acquisition and storage device is connected to a timing control circuit. A microclimate data acquisition system is connected to the host data memory. By means of a single-trigger circuit, the instrument is rapid is data processing, has a certain advancement and is a necessary instrument for improving test methods in desert-zone moisture research.

Description

technical field [0001] The invention relates to an electronic instrument for measuring water evaporation and soil leakage of plants. Background technique [0002] In the process of rational development and utilization of water resources in arid and semi-arid areas, how to rationally utilize limited water resources to increase biological primary productivity is an important research content. To this end, it is necessary to measure the transpiration water consumption of various plants and its changing law during the growth period. It is also necessary to determine the water use coefficient (i.e. the amount of water required to produce a unit of dry matter) of each plant. These have very important practical significance for formulating irrigation systems, rationally controlling irrigation quotas, and establishing rational development models that maintain ecological balance. In addition, the reversal measures of desertified land in our country are also based on the rational us...

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Problems solved by technology

This observation method has a certain area requirement for the observed site, and the error is large, so it is difficult to carry out continuous observation during the crop growth period;

[0006] 3) Using a buoy-type evapotranometer, this kind of equipment cannot be observed in winter and the cost of the equipment is high. In previous research work, the water consumption of potted plants was measured with a weighbridge and a large-scale balance. Due to the low precision and poor resolution of the weighbridge, the balance Although the accuracy is high, but the range is small and the cost is high, it has not been able to obtain accurate data of plant transpiration

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