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Figure 3 | Plant Methods

Figure 3

From: FTIR-ATR-based prediction and modelling of lignin and energy contents reveals independent intra-specific variation of these traits in bioenergy poplars

Figure 3

Partial least square regression (PLSR) models for the prediction of lignin (A) and energy (B) content in extractive-free poplar wood exhibiting a natural range of variability. Lignin was measured with the acetyl bromide method. The energy content was determined with a combustion calorimeter. Plots of measured versus predicted values for lignin (A) and energy (B) content were calculated with the best models with cross-validation results after data preprocessing and automatic wavenumber selection (Table 1 and Table 2). Solid lines represent regression line of best fit between measured and predicted values.

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