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目前国内在测定作物光合作用强度的研究中,除少数单位使用进口多通道红外线CO_2气体分析仪外,一般都使用国产CO_2气体分析仪。该种仪器配套使用电磁簿膜泵,单道采样。在多点取样观测时需要人工依次连接各个气路,待仪器指针稳定后读数,这样在循环测定中既费时费工、又易造成人为误差(视差)。尤其在昼夜连续测定时,观测人员十分劳累。如用多台测定仪同时测定,由于每台CO_2红外分析仪和记录仪售价较高(约5000元),很不经济,而且每台仪器间的误差难于消除。目前国内尚无工厂生产多
Currently in the determination of crop photosynthesis intensity of the study, with the exception of a few units using imported multi-channel infrared CO_2 gas analyzer, the general use of domestic CO_2 gas analyzer. The kind of equipment supporting the use of electromagnetic membrane pump, single-channel sampling. In the multi-point sampling observation, it is necessary to manually connect each gas line in sequence, after the instrument pointer is stable, the reading is performed, so that it takes time and labor in the cycle measurement and causes human error (parallax). Especially in the continuous determination of day and night, observers are very tired. If using multiple analyzers at the same time determination, as each CO_2 infrared analyzer and recorder priced higher (about 5000 yuan), very uneconomical, and difficult to eliminate the error between each instrument. At present, there is no more factory production