Rice canopy absorbed photosynthetic effective radiation continuous observation method

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...

AI Technical Summary

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 sensor at a fixed position will be directly covered by the accumulated water in the field and cannot be observed normally

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