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<p>Efficient production of renewable bioenergy from loblolly pine (<i>Pinus taeda</i> L.) forest residues (juvenile wood, branches, needles, and bark) depends on detailed knowledge of chemical variability of tissue components. We examined the composition of loblolly pine forest residues collected from plantations at first thin and final harvest from three physiographic regions (Piedmont, Upper and Lower Coastal Plain) in the southeastern United States. The pure fractions were chipped, oven-dried, and then sieved with 3&#xa0;mm and 7&#xa0;mm size classes retained for analysis. For each stand and size class, mixed fractions containing a representative sample from the pure fractions were prepared. Extractives, ash individual sugars (glucan, xylan, galactan, arabinan and mannan), and lignin (total, acid soluble, acid insoluble) contents were measured for each pure and mixed sample. Analysis of variance using mixed-effects models was used to determine differences in chemical composition based on tissue fraction and size class, with significant differences tested using Tukey HSD. Extractives, sugars, and lignin contents were significantly different between tissue fractions and size class. Mean total lignin content was highest for bark (47.3%) and lowest for juvenile wood (30.1%). Glucan in branch (35.5%) and mixed fractions (38.8%) was significantly higher in the 7&#xa0;mm size class. For pure fractions, wood had the least variability by stand and size class whereas the mixed fraction had the highest variability in individual sugar contents, and bark for lignin content. Results reveal significant tissue-specific chemical variation in loblolly pine residues supporting improved efficiency and value recovery in bioenergy applications.</p>

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Chemical Characterization of Tissues from Loblolly Pine Forest Residues to Streamline Production of Sustainable Energy and Bioproducts

  • 期刊论文

  • 发表日期：

    2026年1月5日

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  • Ighoyivwi Onakpoma,
  • Sameen Raut,
  • Joseph Dahlen,
  • Seyedehsan Vasefi,
  • Gerald Presley,
  • Matthew Konkler,
  • Sudhagar Mani,
  • Laurence Schimleck

摘要

Efficient production of renewable bioenergy from loblolly pine (Pinus taeda L.) forest residues (juvenile wood, branches, needles, and bark) depends on detailed knowledge of chemical variability of tissue components. We examined the composition of loblolly pine forest residues collected from plantations at first thin and final harvest from three physiographic regions (Piedmont, Upper and Lower Coastal Plain) in the southeastern United States. The pure fractions were chipped, oven-dried, and then sieved with 3 mm and 7 mm size classes retained for analysis. For each stand and size class, mixed fractions containing a representative sample from the pure fractions were prepared. Extractives, ash individual sugars (glucan, xylan, galactan, arabinan and mannan), and lignin (total, acid soluble, acid insoluble) contents were measured for each pure and mixed sample. Analysis of variance using mixed-effects models was used to determine differences in chemical composition based on tissue fraction and size class, with significant differences tested using Tukey HSD. Extractives, sugars, and lignin contents were significantly different between tissue fractions and size class. Mean total lignin content was highest for bark (47.3%) and lowest for juvenile wood (30.1%). Glucan in branch (35.5%) and mixed fractions (38.8%) was significantly higher in the 7 mm size class. For pure fractions, wood had the least variability by stand and size class whereas the mixed fraction had the highest variability in individual sugar contents, and bark for lignin content. Results reveal significant tissue-specific chemical variation in loblolly pine residues supporting improved efficiency and value recovery in bioenergy applications.