【摘要】 光合作用速率测定是植物光合作用研究的重要基础,沉水植物由于所处生境的特殊性,难以应用在陆生植物光合作用研究中发展起来的速率测定方法。在对水体中二氧化碳的基本特征进行详细描述的基础上,介绍了在沉水植物光合作用研究中广泛应用的电化学方法——pH-stat法和pH-drift法的原理,并给出了应用实例。这两种测定水生植物光合作用的电化学方法所依据的溶液无机碳浓度的变化可以利用Gran滴定法方便地计算出来。更多还原

【Abstract】 Measuring photosynthesis rate accurately is very important in photosynthesis studies.However it is difficult to use the common measuring methods developed in land plant studies for the measurement of photosynthesis of submerged macrophytes because of their special habitat.In this paper,the characteristics of dissolved inorganic carbon is described in detail before the introduction of the principles of pH-stat and pH-drift—the electrochemical methods measuring photosynthesis of submerged aquatic macrophytes.The changes of inorganic carbon in water solutions of the two methods can be easily calculated by Gran-titration.更多还原