Impact of Soil-Applied Humic Ameliorative Amendment on the Ligno-Cellulose Quality and Calorific Value of Switchgrass Panicum virgatum L.

The main objective of the paper was to determine ligno-cellulose quality and calorific value switchgrass Panicum virgatum L. impact nutrition treatments (pre-sowing soil humic amendment HA and/or NPK, with annual dose N on both treatments, untreated control UC) years were evaluated as effects within a pilot experiment seven cultivars tested during 2018–2022. Two data sets acid detergent fiber (ADF), lignin (ADL), crude cellulose (CE), hemicellulose (HEM), neutral (NDF), high heating (HHV) evaluated, primary one in terms content secondary yield. average ADF 43.94% (range 30.15–50.91), while contents ADL, CE, HEM, NDF, HHV 9.21% (6.02–12.41), 34.73% (17.98–40.08), 30.49% (21.34–38.41), 74.43% (59.20–81.15%), 17.206 kJ g−1 (16.579–17.799), respectively. An adequate yield 4.17 Mg ha−1 (0.01–29.31), for NDF this 0.79 (0.00–5.39), 3.37 (0.01–23.92), 2.79 (0.01–17.66), 6.96 (0.01–46.93), 1.466 hGJ (0.003–10.603), In cultivar confirmed be most important factor followed by year, having least impact. This order valid each parameters. Moreover, formation homogeneity groups corresponded dry matter therefore (EG 1101 ˃ BO Master EG 1102 Kanlow Alamo Carthage NJ Ecotype), (2021 2020 2022 2019 2018), (HA NPK UC).