Measurements of leaf area index using optical method (IAI-2000) in oil palm plantation: accuracy and limitation assessment

TL;DRAbstract

Leaf area index (LAI) is an important parameter for characterizing the canopy structure ofa crop. The LAI, which is often used as a critical variable to simulate different ecosystem models, is difficult to measure directly in oil palm. In this study, optical methods for quantifYing variation in LAI under different conditions were evaluated. It was found that the accuracy of the readings depended on different factors, such as measuring technique, view cap angle, spatial variability, and height of the measuring point. The measuring technique had an effect on the LAI measurement. Results showed that the Zigzag method underestimated the LAI compared to other methods. The LAI by the Zigzag method was 11.6% less than the LAI by the "one above and four below" technique and 5.7% less than the LAI by the "one above and eight below" technique. The LAI obtained I7y the "one above eight below" technique was 6.2% less than the LAI obtained with the "one abovefour below" technique. Results from the

Chat with Paper

AI Agents for this Paper