Measuring Plant Stem Water Content By Standing-Wave Ratio

This For the determination of plant water content on-line, a sensor based on SWR (Standing-Wave Ratio) measurement principle was developed. To evaluate the feasibility of the proposed technique, a comparative experiment between the developed sensor (BD-II sensor) and SF-L (SF Type Sap Flow Systems, Germany) has been conducted over the past two years. The experimental results obtained from both instruments show a good agreement (R2=0.76). Therefore, the proposed technique is a promising tool in dynamically monitoring plant stem water.