光合作用測定儀開路系統測量低光合強度 Open system for measuring low photosynthetic intensity of instrument error is about 20%, the main error sources for CO2 parser error, the error contribution of about 70%; strength under moderate photosynthetic instrument error is about 10%, the error source for flow meter error, the error contribution of about 65%; high photosynthetic instrument error intensity is about 8%, error source for the meter error, the error contribution of about 75%. Closed system for measuring low photosynthetic intensity of instrument error is about 15%, moderate photosynthetic intensity is about 415%, higher photosynthetic intensity is about 215%. 開路系統測量低光合強度下儀器誤差為20 %左右,主要誤差源為CO2 分析器誤差,誤差貢獻約為70 %;中等光合強度下儀器誤差為10 %左右,誤差源為流量計誤差,誤差貢獻約為65 %;高光合強度下儀器誤差為8 %左右,誤差源為流量計誤差,誤差貢獻約為75 %。閉路系統測量低光合強度下儀器誤差約為15 % ,中等光合強度下約為415 % ,高光合強度下約為215 %。誤差源均以CO2 測量誤差為主,誤差貢獻約為90 %。開路系統較適合高光合強度下作用,此時儀器誤差較小,較真實反映了光合作用,但對流量和CO2分析器精度要求較高;而閉路系統較適合低光合強度下使用,在允許范圍內應選擇較大的流量和光合面積。儀器誤差僅是誤差因素之一,觀測中需考慮由于時間變化而改變環境因子所造成的影響。生物源誤差也是造成綜合誤差的重要且復雜因子之一,這有待于進一步研究。 參考文獻：http://www.ny-17.com/product/41.html
