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System for measuring evapotranspiration of complex ecosystem and operating method thereof

An ecosystem and measurement system technology, applied in the agricultural field, can solve the problems of inability to obtain soil evaporation, inability to obtain evapotranspiration of different types of plant transpiration, etc., and achieve the effects of easy promotion and use, high degree of automation, and increased contact

Active Publication Date: 2019-08-13
NORTHWEST A & F UNIV
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Problems solved by technology

However, these methods cannot obtain the evapotranspiration in the soil or near the surface, nor can the components of evapotranspiration and the transpiration of different types of plants

Method used

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  • System for measuring evapotranspiration of complex ecosystem and operating method thereof
  • System for measuring evapotranspiration of complex ecosystem and operating method thereof
  • System for measuring evapotranspiration of complex ecosystem and operating method thereof

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Embodiment Construction

[0057] The technical solutions of the present invention will be further described in detail below in conjunction with the accompanying drawings and specific embodiments.

[0058] refer to figure 1 , the present invention is a complex ecosystem evapotranspiration measurement system based on heat pulse technology, including a nine-pin heat pulse soil evaporation probe installed on the soil surface, and a three-pin heat pulse plant sap flow meter installed on a thick plant stalk Probes and wrapped stem flow meter probes installed on small plant stalks. The sensor system of the invention has the advantages of in-situ, small disturbance, high degree of automation, convenient use, high measurement accuracy, low material price, and is convenient for popularization and use in scientific research and meteorological stations. It can be used to measure the evapotranspiration of complex ecosystems.

[0059] A nine-pin heat pulse soil evaporation probe on the soil surface of a complex e...

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Abstract

The invention discloses a system for measuring evapotranspiration of a complex ecosystem and an operating method thereof. A sensor for measuring evapotranspiration comprises a nine-needle heat pulse probe for measuring soil evaporation, a three-needle heat pulse probe for measuring the stem-flow of a plant with thick stalk and a wrapped stem-flow meter suitable for a plant with thin stalk, whereinthe nine-needle probe comprises five temperature sensing probes and four heating probes placed in a T-shaped probe handle. The invention also provides a method of estimating the evapotranspiration using the above device. The system provided by the invention has the advantages of in-situ monitoring, small disturbance to soil and vegetation, high degree of automation, convenient use, etc., and cancontinuously and automatically measure temperature changes of surface soils, soil thermal characteristics and transpiration of plants in different depths. The evapotranspiration of forest and farmlandsystems can be obtained by the invention.

Description

technical field [0001] The invention belongs to the field of agricultural technology, and relates to a composite ecosystem evapotranspiration measurement system and an operating method thereof, in particular to a composite ecosystem evapotranspiration measurement system based on heat pulse technology and an operating method thereof. Background technique [0002] Water flow in the soil-plant-atmosphere continuum (SPAC) includes evaporation from the soil surface and transpiration by plants, ie, evapotranspiration. At present, commonly used techniques for measuring and estimating evaporation mainly include lysimeter method, water balance method, Bowen ratio energy balance method, eddy correlation method, aerodynamic method, remote sensing technology and Penman-Monteith empirical formula, etc. However, these methods cannot obtain the evapotranspiration in the soil or near the surface, nor the components of evapotranspiration and the transpiration of different types of plants. ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01N25/00G01N25/20G01F1/00
CPCG01N25/00G01N25/20G01F1/00
Inventor 何海龙刘扬王佳铭王愿斌吕家珑
Owner NORTHWEST A & F UNIV
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