AN AGROMETEOROLOGICAL MODEL OF PHOTOSYNTHESIS IN SOYBEAN CANOPY

Liu Jiandong; Yu Qiang; Wu Naiyuan

Vol.12, NO.1, 2001

Article Contents

Article Navigation > Journal of Applied Meteorological Science > 2001 > 12(1): 14-20

Liu Jiandong, Yu Qiang, Wu Naiyuan. An agrometeorological model of photosynthesis in soybean canopy. J Appl Meteor Sci, 2001, 12(1): 14-20.

Citation:

Liu Jiandong, Yu Qiang, Wu Naiyuan. An agrometeorological model of photosynthesis in soybean canopy. J Appl Meteor Sci, 2001, 12(1): 14-20.

Liu Jiandong, Yu Qiang, Wu Naiyuan. An agrometeorological model of photosynthesis in soybean canopy. J Appl Meteor Sci, 2001, 12(1): 14-20.

Citation:

Liu Jiandong, Yu Qiang, Wu Naiyuan. An agrometeorological model of photosynthesis in soybean canopy. J Appl Meteor Sci, 2001, 12(1): 14-20.

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AN AGROMETEOROLOGICAL MODEL OF PHOTOSYNTHESIS IN SOYBEAN CANOPY

1.
Chinese Academy of Meteorological Sciences, Beijing 100081
2.
Institute of Geographic Scionces and Natural Resources, CAS, Beijing 100101
3.
Research Center of A grometeorology, Shandong Province, Tai'an 271000

Received Date: 1999-10-11
Rev Recd Date: 2000-02-23
Publish Date: 2001-02-01

Abstract

Abstract

A numerical model for simulating the photosynthesis of soybean canopy was established. The model includes sub-models for simulating diurnal variations of radiation. Temperature and CO2 density as well as the plant physiological sub-model which includes photosynthesis and respiration of soybean leaves. The results show that the mean error is about 8.7% when it is used for simulation the diurnal variation of photosynthesis in soybean canopy, and the model can simulate the process of midday depression of photosynthesis in soybean canopy accurately. Influence of the single factor on canopy photosynthesis was given by numerical analysis using the model, which provides a theoretical basis for raising the yield of soybean in Huanghuaihai Region.
- Soybean canopy;
- Midday depression of photosynthesis;
- Agrometeorology;
- Numerical simulation

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References(12)

Figures and Tables

图 1 1998年7月31日大豆叶片光合作用模拟(a)光合速率对光量子通量密度的响应(b)对CO₂的响应(c)光合速率的实测值与模拟值

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图 2 1998年7月31日大豆群体光合午休模拟(a) CO₂浓度一天中保持330 × 10^-6不变(b)考虑CO₂日变化过程(○代表冠层光合作用实测值, 实线代表冠层光合作用模拟值; 虚线代表不同层次冠层的光合用, 由上至下依次对应叶面积深度0~1, 1~2, 2~3, 3~3.347)

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图 3 群体光合速率随温度及辐射变化模拟结果

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表 1 大豆倾角叶面积分布密度(1998年7月30日)

References

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