| 韦秋芳,梁健仪,黄继川,等.生物炭-过氧化尿素对酚酸胁迫下广藿香扦插苗生长及生理生化指标的影响[J].广东农业科学,2024,(11-12):- |
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生物炭-过氧化尿素对酚酸胁迫下广藿香扦插苗生长及生理生化指标的影响 |
| The Effect of Biochar-Urea Peroxide on the Growth and physiological Biochemical Indicators of Patchouli Cuttings under Phenolic Acid Stress |
| 投稿时间：2024-10-15 修订日期：2024-11-25 |
| DOI： |
| 中文关键词: 广藿香 酚酸 生物炭 过氧化尿素 农艺性状 抗氧化酶活性 |
| 英文关键词: Pogostemon cablin phenolic acid biochar urea peroxide agronomic traits antioxidant enzyme activity. |
| 基金项目:国家自然科学基-青年基金项目,国家自然科学基金项目（面上项目，重点项目，重大项目） |
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| 摘要点击次数: 23 |
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| 中文摘要: |
| 【目的】为缓解土壤中酚酸对广藿香（Pogostemon cablin）的化感效应，并探究生物炭-过氧化尿素复合颗粒对酚酸胁迫对广藿香扦插苗农艺性状及生理生化指标的影响，以期为中药材连作土壤调理剂的研发提供参考依据。【方法】采用盆栽试验，共设置5个处理：常规栽培（CK）、酚酸胁迫处理（PhA）、酚酸+生物炭-过氧化尿素复合颗粒（PhA+BC-UP）、酚酸+生物炭颗粒（PhA+BC）及酚酸+过氧化尿素颗粒（PhA+UP）。在广藿香扦插苗移栽30 d后，测定植株农艺性状、根系表型、根系活力、叶片抗氧化酶等15个指标，及根际土壤中残余总酚酸含量，并比较各处理间的差异。【结果】与PhA处理（是PhA处理的意思吗？其实后面几个处理都加了酚酸，建议用PhA处理）相比，PhA+BC-UP处理的广藿香苗地上部生物量和株高分别增加28.8%和21.4%；根长、根表面积、根体积、根尖数、分枝数及根交叉数的增幅为20.1%～70.6%；根系活力提高23.6%，MDA含量降低33.6%。与CK相比，PhA处理显著抑制广藿香叶片中超氧化物歧化酶（SOD）的活性，同时诱导过氧化物酶（POD）和过氧化氢酶（CAT）活性上升。相较于PhA处理，PhA+BC-UP处理对叶片抗氧化酶活性表现出相反的调控作用。此外，与单独施用生物炭或过氧化尿素颗粒相比，生物炭-过氧化尿素复合颗粒在酚酸胁迫下对广藿香扦插苗的生长指标表现出更显著的促进效果，增幅分别超过4.4%和15.9%；根系活力分别提高了18.2%和41.2%；而MDA含量则分别降低了14.9%和95.8%。【结论】生物炭-过氧化尿素复合颗粒能有效降低土壤中酚酸含量，从而减轻酚酸对广藿香扦插苗的化感胁迫，促进根系形态发育，调节植株抗氧化酶活性，进而促进广藿香的生长。 |
| 英文摘要: |
| 【Objective】To alleviate the allelopathic effects of phenolic acids in soil on patchouli (Pogostemon cablin) and to investigate the impact of biochar-urea peroxide composite particles on the agronomic traits and physiological-biochemical indicators of patchouli cuttings under phenolic acid stress, this study aims to provide a reference for the development of soil conditioners for the continuous cropping of Chinese medicinal herbs.【Method】A pot experiment was conducted with five treatments: conventional cultivation (CK), phenolic acid stress (PhA), phenolic acid stress with the addition of biochar-urea peroxide composite particles (PhA+BC-UP), biochar granules addition (PhA+BC), and urea peroxide granules addition (PhA+UP)，respectively. After transplanting the patchouli cuttings for 30 days, 15 indicators were measured, including agronomic traits, root phenotypes, root activity, and leaf antioxidant enzymes, Additionally, the residual total phenolic acid content in the rhizosphere soil was determined, and the differences among the treatments were compared.【Result】Compared to the PhA treatment, the PhA+BC-UP treatment resulted in a 28.8% increase in the aboveground biomass and a 21.4% increase in the height of patchouli seedlings, the increases in root length, root surface area, root volume, root tip number, branch number, and crossing number ranged from 20.1% to 70.6%, the root vitality was improved by 23.6%, while the MDA content decreased by 33.6%. Compared to CK, the PhA treatment significantly inhibited the activity of superoxide dismutase (SOD) in patchouli leaves, while simultaneously inducing increases in the activities of peroxidase (POD) and catalase (CAT). In contrast to the PhA treatment, the PhA+BC-UP treatment exhibited an opposite regulatory effect on the leaf antioxidant enzyme activity. Furthermore, compared to the individual application of biochar or urea peroxide particles, the biochar-urea peroxide composite particles showed a better regulatory effect on the growth indicators of patchouli cuttings under phenolic acid stress, with increases exceeding 4.4% and 15.9%, respectively, root vitality improved by 18.2% and 41.2%, while MDA content decreased by 14.9% and 95.8%, respectively. 【Conclusion】The biochar-urea peroxide composite particles can effectively reduce the phenolic acid content in the soil, thereby alleviating the allelopathic stress of phenolic acids on patchouli cuttings. This promotes root morphological development and regulates the antioxidant enzyme activity in the plants, ultimately enhancing the growth of patchouli. |
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