光合作用强度是衡量绿色植物生产有机物质速度的生理指标。农业科学实验中常常需要进行光合作用强度的测定。 测定光合作用强度的方法通常有两种。一种是测量单位时间内单位叶面积所吸收的二氧化碳量,用CO_2毫克/分米~2·小时表示;另一种是测量单位时间内单位叶面积干物质积累量,用干物重(毫克)/分米~2·小时表示。前者比较烦琐,后者比较简便。 Photosynthesis intensity is a measure of the speed of organic matter production of green plants physiological indicators. Agricultural science experiments often need to measure the intensity of photosynthesis. There are usually two methods for determining photosynthesis intensity. One is to measure the amount of carbon dioxide absorbed by leaf area per unit of time, expressed as CO 2 mg / dm 2 · h, and the other is the measurement of dry matter accumulation per unit leaf area, expressed in dry matter (mg) / Dm ~ 2 · h. The former is more cumbersome, the latter is relatively simple.