To rapidly analyze the biomass quality(soluble matter,cellulose,hemicellulose,lignin,and ash content,as well as cellulose crystallinity and polymerization)of Miscanthus lutarioriparius in Dongting Lake,126 germplasm resources were collected using two spectral pre-processing methods and three characteristic spectral screening methods.Using different combination methods with optimized spectra and original spectra,a near-infrared spectral analysis model was constructed based the partial least squares method.A dual optimization model was selected for seven quality indicators,and the 126 germplasm ...