密闭气路斜率法田间光合测定装置经数年应用,已被证明是一种快速、精确、轻便易携、适于田间应用的光合测定仪器.然而使用该装置时需要对每台仪器制作一个mV(或μA)—CO_2ppm—CO_2ppm·mV~(-1)(或μA~(-1))对照表,供计算时查对.这是因为目前国内生产的红外线CO_2气体分析仪的测定输出mV(或μA)与CO_2浓度(ppm)均为非线性关系,虽然每台仪器都 Closed-loop gas path slope method Field photosynthesis measuring device after years of application, has been proved to be a fast, accurate, portable and portable, suitable for field applications of photosynthetic measuring instruments.However, the use of the device required for each instrument to produce a mV (Or μA) -CO_2ppm-CO_2ppm · mV -1 (or μA -1) comparison table, for the calculation check, this is because the current domestic production of infrared CO_2 gas analyzer measured output mV ( Or μA) and CO 2 concentration (ppm) are non-linear, although each instrument is