| The application of SUNSCAN canopy analysis system in the measurement of field ecosystem |
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| DOI：10.7606/j.issn.1000-7601.2005.04.16 |
| Key Words: measurement instrument photosynthetic active radiation LAI SUNSCAN canopy analysis system |
| Author Name | Affiliation | | SHI Ze-yan | College of Geography and Remote Science,Beijing Normal University；Key Lab of Environment Change and Natural Disaster,Ministry of Education,Beijing 100875,China | | GAO Xiao-fei | College of Geography and Remote Science,Beijing Normal University；Key Lab of Environment Change and Natural Disaster,Ministry of Education,Beijing 100875,China | | XIE Yun | College of Geography and Remote Science,Beijing Normal University；Key Lab of Environment Change and Natural Disaster,Ministry of Education,Beijing 100875,China |
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| Abstract: |
| SUNSCAN canopy analysis system made in Delta company of England was validated in the experimental field of summer maize to observe its application in the measurement of ecological parameters such as PAR above and beneath the canopy and LAI. The results show that SUNSCAN system can measure PAR above the canopy, TPAR beneath the canopy and LAI etc at one time. So it surpasses the other instruments that are complicated in measurement and un-synchronous in time, and it is advantageous in the measurement of numerous samples with no damnification. The instrument may operate automatically to observe the diurnal dynamic of total solar radiation. The best measurement period of Sunscan system is (9∶00)11∶00 a.m. and 13∶0015∶00 p.m. In a word, SUNSCAN canopy analysis system is a portable and highly efficient instrument with a great potential of application. |
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