Rice canopy absorbed photosynthetic effective radiation continuous observation method

A photosynthetically active radiation and rice technology, which is applied in the field of vegetation remote sensing inversion parameter acquisition, can solve the problem that photon sensors cannot observe normally, and achieve the effect of simplicity, ease and accuracy.

Inactive Publication Date: 2018-11-23
NANJING UNIV
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Problems solved by technology

During the peak season of rice growth, the water level in the field will rise or fall, and the optical quantum senso

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  • Rice canopy absorbed photosynthetic effective radiation continuous observation method
  • Rice canopy absorbed photosynthetic effective radiation continuous observation method
  • Rice canopy absorbed photosynthetic effective radiation continuous observation method

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Embodiment Construction

[0023] The goal of this study is to provide a method for continuously obtaining photosynthetically active radiation absorbed by the rice canopy, which can serve the research on the material cycle and energy balance of the rice ecosystem. It can be more convenient to obtain relevant vegetation remote sensing retrieval parameters, which is conducive to the quantitative study of energy allocation in the carbon cycle of farmland ecosystems. The principle of the invention is mainly based on the special properties of the EVA foam material, which is used as a buoy device that can be freely adjusted with the water level of the paddy field, carrying a light quantum sensor, and continuously observing the photosynthetically active radiation from the water to the canopy. The reflected photosynthetically active radiation is observed, and the photosynthetically active radiation absorbed by the canopy is calculated according to the principle of energy balance.

[0024] The main design steps ...

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Abstract

The invention relates to a method that uses a multi-layer compound canopy radiation continuous observation system to obtain radiation data on the rice canopy and below the canopy, thus calculating therice canopy photosynthetic effective radiation; the method belongs to the vegetation remote sensing inversion parameter obtaining method research field, and comprises the following steps: designing and building an escape photosynthetic effective radiation observation device below the rice canopy and changing with the rice field water level; building a canopy photosynthetic effective radiation transmission process observation system; calculating the canopy photosynthetic effective radiation absorption. The method uses the plant canopy light energy transmission process energy balance as the basis, obtains incoming, reflection and escape energy data in a plant canopy photosynthetic effective radiation transmission process, thus simply, directly and effectively calculating the canopy absorbedphotosynthetic effective radiation; the method can de directly applied in the ecological system plant productivity estimation studies.

Description

1. Technical field [0001] The invention relates to a method for calculating the photosynthetically active radiation of the rice canopy by using a multi-level composite canopy radiation continuous observation system to acquire radiation data on the canopy of rice and under the canopy. Specifically, combining the general-purpose canopy radiation observation and the improved observation method of the buoy type radiation observation device that can float with the water level of the paddy field, using multiple photon radiometers located in different positions of the rice ecosystem to directly measure the rice canopy absorption The method of observing and calculating photosynthetically active radiation belongs to the research field of vegetation remote sensing inversion parameter acquisition method. 2. Technical background [0002] Photosynthetically active radiation (PAR, photosynthetically active radiation) is short-wave solar radiation with a wavelength of 0.4-0.7 μm, which ref...

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Application Information

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IPC IPC(8): G01J1/42G01N21/63
CPCG01J1/4257G01N21/63G01N2021/635
Inventor 李季张乾王敏张永光李朝晖
Owner NANJING UNIV
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