光合作用测定仪开路系统测量低光合强度 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%. 开路系统测量低光合强度下仪器误差为20 %左右,主要误差源为CO2 分析器误差,误差贡献约为70 %;中等光合强度下仪器误差为10 %左右,误差源为流量计误差,误差贡献约为65 %;高光合强度下仪器误差为8 %左右,误差源为流量计误差,误差贡献约为75 %。闭路系统测量低光合强度下仪器误差约为15 % ,中等光合强度下约为415 % ,高光合强度下约为215 %。误差源均以CO2 测量误差为主,误差贡献约为90 %。开路系统较适合高光合强度下作用,此时仪器误差较小,较真实反映了光合作用,但对流量和CO2分析器精度要求较高;而闭路系统较适合低光合强度下使用,在允许范围内应选择较大的流量和光合面积。仪器误差仅是误差因素之一,观测中需考虑由于时间变化而改变环境因子所造成的影响。生物源误差也是造成综合误差的重要且复杂因子之一,这有待于进一步研究。 参考文献：http://www.ny-17.com/product/41.html
