论文部分内容阅读
用红外线CO_2分析仪在同化室内以气流法测定不同作物的光合作用强度时,首先要确定各种作物的空气最适流量。不同作物因光合面积和光合强度的不同,所要求的空气最适流量是不相同的。选择的流量过小,引起CO_2亏缺,限制作物光合,测定值偏低,测定时间长。在相对湿度较低时,流量过大引起气孔关闭,而且同化室进出口CO_2浓度差变小,仪器的测定误差大。因此在测
Using infrared CO_2 analyzer in the assimilation chamber to determine the intensity of photosynthesis of different crops by airflow method, we must first determine the optimum air flow of various crops. Different crops due to different photosynthetic area and photosynthetic intensity, the required optimum air flow is not the same. Select the flow is too small, causing CO 2 deficiencies, limiting crop photosynthesis, the measured value is low, the determination of a long time. When the relative humidity is low, the stomata are closed when the flow rate is too large, and the CO2 concentration difference between the inlet and outlet of the assimilation chamber becomes smaller, and the measurement error of the instrument is larger. So in the test