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<p>This study examined the effects of biochar produced from forestry waste (<i>Populus alba×P. berolinensis</i> and <i>Pinus sylvestris var. mongolica</i> branches and leaves) on soil physicochemical properties through a 60-day static incubation experiment under varying pyrolysis temperatures (300, 500, and 700&#xa0;°C) and application rates (1%, 3%, and 5% (w/w)). Results indicated that biochar application enhanced soil available potassium content and pH to different extents. Notably, the most pronounced effect was observed with a 5% application rate of <i>Populus alba×P. berolinensis</i> leaves biochar pyrolyzed at 700&#xa0;°C, which increased available potassium by 266.39% and pH by 9.82% compared to the control. At a 5% application rate, biochar produced from <i>Populus alba×P. berolinensis</i> leaves pyrolyzed at 300&#xa0;°C increased soil ammonium nitrogen content by 49.27% and available phosphorus content by 141.68% compared to the control. Furthermore, biochar improved soil organic Matter content, water content, and aggregation. Specifically, the most significant increases were seen with a 5% application rate of <i>Populus alba×P. berolinensis</i> branch biochar pyrolyzed at 300&#xa0;°C, raising organic Matter by 320.03% and water content by 30.61% compared to the control. Regarding soil aggregate distribution, a 5% application rate of <i>Pinus sylvestris var. mongolica</i> branch biochar pyrolyzed at 300&#xa0;°C significantly increased the macroaggregate fraction while reducing microaggregates and silt-clay fractions. In conclusion, the application of forestry waste-derived biochar demonstrates potential for improving soil physicochemical properties, with pyrolysis temperature, feedstock source, and application rate all significantly influencing these improvement effects.</p>

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Effects of biochar from populus alba × populus berolinensis and pinus sylvestris var. mongolica application on soil physicochemical properties

  • 期刊论文

  • 出版模式：

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  • 发表日期：

    2025年9月29日

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  • Tiantong Wang,
  • Liyue Kou,
  • Qing Luo,
  • Wenju Dai,
  • Qing He,
  • Yongyao Deng,
  • Zhongping Wei

摘要

This study examined the effects of biochar produced from forestry waste (Populus alba×P. berolinensis and Pinus sylvestris var. mongolica branches and leaves) on soil physicochemical properties through a 60-day static incubation experiment under varying pyrolysis temperatures (300, 500, and 700 °C) and application rates (1%, 3%, and 5% (w/w)). Results indicated that biochar application enhanced soil available potassium content and pH to different extents. Notably, the most pronounced effect was observed with a 5% application rate of Populus alba×P. berolinensis leaves biochar pyrolyzed at 700 °C, which increased available potassium by 266.39% and pH by 9.82% compared to the control. At a 5% application rate, biochar produced from Populus alba×P. berolinensis leaves pyrolyzed at 300 °C increased soil ammonium nitrogen content by 49.27% and available phosphorus content by 141.68% compared to the control. Furthermore, biochar improved soil organic Matter content, water content, and aggregation. Specifically, the most significant increases were seen with a 5% application rate of Populus alba×P. berolinensis branch biochar pyrolyzed at 300 °C, raising organic Matter by 320.03% and water content by 30.61% compared to the control. Regarding soil aggregate distribution, a 5% application rate of Pinus sylvestris var. mongolica branch biochar pyrolyzed at 300 °C significantly increased the macroaggregate fraction while reducing microaggregates and silt-clay fractions. In conclusion, the application of forestry waste-derived biochar demonstrates potential for improving soil physicochemical properties, with pyrolysis temperature, feedstock source, and application rate all significantly influencing these improvement effects.