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Portable device for determining vertical profile distribution of CO2 concentration in plant population

A group and concentration technology, which is applied in the field of biology and meteorology research instruments, and agronomy, can solve the problems of inability to realize the comparison and measurement of different structural groups, the inconvenient adjustment of the measurement level height, and the inability to move, so as to achieve easy movement and easy maintenance , low cost effect

Inactive Publication Date: 2010-11-17
INST OF GEOGRAPHICAL SCI & NATURAL RESOURCE RES CAS
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Problems solved by technology

Judging from some of the measuring devices given in the report, the measurement must depend on the installation of the meteorological tower, and can only measure the CO at the location of the meteorological tower. 2 Concentration vertical profile distribution, can not move, can not realize the comparative measurement of different structural groups, the adjustment of the height of the measurement layer is inconvenient, and the cost is relatively expensive

Method used

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  • Portable device for determining vertical profile distribution of CO2 concentration in plant population
  • Portable device for determining vertical profile distribution of CO2 concentration in plant population
  • Portable device for determining vertical profile distribution of CO2 concentration in plant population

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[0022] Purpose: To measure the CO2 in the wheat population 2 Concentration Vertical Profile Distribution

[0023] 1) Materials and methods: During the earing stage of winter wheat, select a sunny day from 10:00 to 10:30 in the morning for the measurement. The temperature during the measurement is 22-23°C, and the PPFD is 1400-1500 μmol·m -2 the s -1 , wind speed < 1 m / s, winter wheat plant height is 73 cm, measured every 10 cm downwards from the top of the canopy.

[0024] 2) Device parameters: According to the measurement requirements and the plant height of winter wheat, the height of the system support is selected as 1 meter (excluding the tip inserted into the soil), which are respectively 3, 13, 23, 33, 43, 53, 63, and 73 cm from the ground Fix 8 gas collectors, the length of the gas collector is 20cm, the inner diameter is 0.8cm, 20 air inlet holes are evenly arranged on the gas collector, the diameter is 0.2cm. Measured as above.

[0025] 3) Results and analysis

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Abstract

The invention provides a portable device for determining vertical profile distribution of CO2 concentration in plant population, which consists of a gas collector, a gas circuit switcher, an air filter, an air pump, an infrared gas analyzer and a system support. The CO2 concentration in air at different levels is measured by switching gas circuits to obtain vertical profile distribution of the CO2 concentration in plant population. The device has the advantages of convenient movement, low fabrication cost, flexible and convenient use and accurate data obtained, and can be adjusted according to the height of target plants and measuring requirements, thus meeting the requirement of wild environment.

Description

technical field [0001] The invention relates to a portable method for measuring CO in plant populations 2 A device for concentration vertical profile distribution, by collecting gases at different levels within the plant population and measuring their CO 2 Concentration, to determine the CO within the plant population 2 Concentration vertical profile distribution, belonging to the field of agronomy, biology and meteorology research instruments. technical background [0002] CO 2 is the raw material for photosynthesis, and the rate of photosynthesis has a significant effect on CO 2 Concentration exhibits Michaelis-Menten response, CO 2 The level of concentration directly affects the photosynthesis of plants, CO 2 The increase of concentration can increase the photosynthetic rate, CO 2 The reduction of the concentration can reduce the photosynthetic rate, thereby affecting the plant yield. CO in plant populations 2 Concentration is the plant uptake of CO 2 and ambient...

Claims

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Application Information

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IPC IPC(8): G01N21/35G01N1/24G01N21/00
Inventor 王建林赵风华温学发欧阳竹
Owner INST OF GEOGRAPHICAL SCI & NATURAL RESOURCE RES CAS
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