Research on the multichannel measurement system in the forest soil respiration

摘要

According to the requirements of the forest soil respiration experiment, the multichannel measurement system in the forest soil respiration is researched and designed. The system selects the Programmable Logic Controller (PLC) as the core controller, changes the measurement channel by switching the measurement channel unit, analyses the soil respiration gas by the gas analyzer, and saves the soil respiration data by the data collector. The data analysis software is designed according to the requirements of system analysis. The change rate of soil respiration is calculated by the least square method in order to analysis scientifically in forest soil respiration.