Desert oasis farmland evapotranspiration monitoring device

Abstract

The invention relates to the technical field of farmland evapotranspiration monitoring, and concretely relates to a desert oasis farmland evapotranspiration monitoring device. The device comprises a base and a transparent cover box, the transparent cover box is fixedly connected to the center of the upper end face of the base, a pressure gauge is fixedly connected to the left side of the transparent cover box, and an electric telescopic rod is arranged on the right side of the transparent cover box. The lower end face of the electric telescopic rod is fixedly connected with the base, the upper end face of the electric telescopic rod is fixedly connected with a telescopic rod, the outer side of the telescopic rod is fixedly connected with a connecting plate, and the left side of the connecting plate is fixedly connected with a protective cover. Through arrangement of the connecting plate, a guide rod, the protective cover and a rotating motor, the electric telescopic rod is started to drive the telescopic rod to move downwards, then the protective cover is arranged on the outer side of the transparent cover box, and the rotating motor is started to drive a rotating plate and the connecting plate, so that a first brush and a second brush can clean the surface of the transparent cover box, the outer side of the transparent cover box is ensured to be clean and tidy, the normal light transmission effect is ensured, and the accuracy of test data is ensured.

Description

technical field [0001] The invention relates to the technical field of farmland evapotranspiration monitoring, in particular to a desert oasis farmland evapotranspiration monitoring device. Background technique [0002] With the development of population and economy, the problem of global water resource shortage is becoming more and more serious. Especially in arid and semi-arid areas, karst and other areas, water is the controlling factor of the ecological environment. Vegetation evapotranspiration is an important link in the material cycle of the ecosystem. The important parameters of agricultural irrigation, hydrological research and forecasting, and water resources management have always been the research focus of soil science, geography, hydrology, and ecology. At present, the methods for measuring evapotranspiration at home and abroad mainly include lysimeter method, TDP Among them, the TDP method and the stomatometer method are mainly used for the transpiration of veg...

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Problems solved by technology

[0002] With the development of population and economy, the problem of global water resource shortage is becoming more and more serious. Especially in arid and semi-arid areas, karst and other areas, water is the controlling factor of the ecological environment. Vegetation evapotranspiration is an important link in the material cycle of the ecosystem. The important parameters of agricultural irrigation, hydrological research and forecasting, and water resources management have always been the research focus of soil science, geography, hydrology, and ecology. At present, the methods for measuring evapotranspiration at home and abroad mainly include lysimeter method, TDP Among them, the TDP method and the stomatometer method are mainly used for the transpiration of vegetation, and cannot take into account surface evaporation; the eddy correlation method is mainly used for large-scale Regional water balance monitoring

[0003] Most of the test methods currently on the market use the main principle to monitor the vegetation evapotranspiration (ET) based on the change of air temperature and humidity in the airtight box and the humidity difference of the air exchanged between the airtight box and the environment (outside). The cover box is fixed in an area, and the vegetation in the box is used for normal photosynthesis. However, when the traditional transparent cover box is used, dust and impurities will adhere to the surface, which blocks sunlight and affects photosynthesis. Therefore, a method is proposed to solve the above problems. Desert oasis farmland evapotranspiration monitoring device

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