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    卷边桩菇与生物炭协同作用对山新杨幼苗生长及生理指标的影响

    Synergistic effects of Paxillus involutus and biochar on growth and physiological indices of Populus davidiana × P. alba seedlings

      摘要
    • 摘要:
      目的 为验证卷边桩菇与生物炭联合施用对山新杨幼苗生长的协同增效作用，探讨其对苗木生长的促进机制，为东北地区山新杨优质育苗和生态环境改善提供理论依据和数据基础。
      方法 以山新杨苗木为研究对象，设置空白处理、单独施用卷边桩菇、单独施用生物炭、卷边桩菇与生物炭联合施用4个处理。通过植物生理与生化指标测定，评估各处理对苗高、地径、叶面积、生物量、光和色素、纤维素、可溶性蛋白、可溶性糖等生长及生理参数的影响，同时分析根系生长情况。
      结果 联合施用卷边桩菇与生物炭显著促进了山新杨的生长，苗高、地径和叶面积分别较空白处理提高23.2%、16.7%和17.06%；单独施用卷边桩菇山新杨幼苗的苗高、地径和叶面积较空白处理分别提高17.5%、29.5%和16.23%。在生理指标方面，联合施用显著提升了叶片中叶绿素a、纤维素、可溶性糖和可溶性蛋白含量，增幅分别为10.03%、6.23%、19.63%和85.51%，而叶绿素b略降1.77%；单独施用卷边桩菇时，叶绿素a、纤维素、可溶性糖及可溶性蛋白含量较空白处理分别提高6.72%、5.84%、9.37%和45.6%，而叶绿素b下降6.32%。此外，联合施用显著促进了山新杨根系的生长发育。生物炭和菌液联合施用的山新杨苗木根系相较于对照组根系长度和根表面积分别增加了145.51%和86.82%。
      结论 卷边桩菇与生物炭联合施用能显著促进山新杨幼苗的生长与生理活性，具有较好的协同增效功能。本研究结果可为提高苗木质量、增加造林成活率及推动生态林业可持续发展提供了理论与实践依据。

       

      Abstract:
      Objective This paper aims to verify the synergistic effects of combined application of Paxillus involutus and biochar on Populus davidiana × P. alba seedlings by exploring their growth-promoting functions, so as to provide data support for subsequent research, and offer a theoretical basis for high-quality seedling cultivation and ecological environment improvement in northeastern China.
      Method Using Populus davidiana × P. alba seedlings as the research objects, four treatments were established: blank control, sole application of Paxillus involutus, sole application of biochar, and combined application of Paxillus involutus and biochar. Plant physiological and biochemical experimental methods were employed to measure growth and physiological indices, including seedling height, ground diameter, leaf area, biomass, photosynthetic pigments, cellulose, soluble protein, and soluble sugar content, as well as root growth under each treatment.
      Result Growth indices: seedling height, ground diameter, and leaf area significantly increased. Compared with blank control, the combined application treatment improved these indices by 23.2%, 16.7%, and 17.06%, respectively. The sole application of Paxillus involutus increased them by 17.5%, 29.5%, and 16.23%, respectively. Physiological indics: chlorophyll a, cellulose, soluble sugar, and soluble protein content in leaves significantly rose. The combined application treatment enhanced these above by 10.03%, 6.23%, 19.63%, and 85.51%, respectively, while chlorophyll b decreased by 1.77%. The sole Paxillus involutus treatment increased them by 6.72%, 5.84%, 9.37%, and 45.6%, respectively, with chlorophyll b declining by 6.32%. Additionally, the combined application markedly improved root growth in Populus davidiana × P. alba. The roots of Populus davidiana × P. alba seedlings treated with both biochar and Paxillus involutus showed a 145.51% increase in root length and an 86.82% increase in root surface area compared with control.
      Conclusion The combined application of Paxillus involutus and biochar can significantly promote the growth and physiological activity of Populus davidiana × P. alba seedlings, demonstrating a notable synergistic effect. The findings of this study provide both theoretical and practical foundations for improving seedling quality, enhancing afforestation survival rates, and promoting the sustainable development of ecological forestry.

       

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