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| 施加不同量生物炭对砂姜黑土团聚体特征及有机碳分布的影响（已上传） |
| Effects of applying different amounts of biochar on the characteristics of agglomerates and organic carbon distribution in shajiang black soil |
| 投稿时间：2024-09-10 修订日期：2025-01-06 |
| DOI： |
| 中文关键词: 砂姜黑土 生物炭 土壤团聚体 土壤有机碳 易氧化有机碳 |
| 英文关键词:shajiang black soil biochar soil aggregate soil organic carbon Easily oxidized organic carbon |
| 基金项目:国家自然科学(32101316)； 2023年高校中青年教师培养行动项目(YQYB2023002) |
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| 中文摘要: |
| 【目的】通过研究生物炭添加对砂姜黑土中土壤团聚体稳定性和有机碳分布的影响，旨在为改善砂姜黑土质量和土壤结构提供科学支持。【方法】本研究以砂姜黑土为试验材料，通过土柱培养试验，共设置CK（不施加生物炭）、B1（1%生物炭 ，即生物炭占生物炭与土壤总重量的1%。下同）、B3（3%生物炭）和B6（6%生物炭）4个处理，研究不同生物炭施加量对砂姜黑土团聚体稳定性特征及有机碳分布的影响。【结果】与CK处理相比，B3和B6处理显著提高1~ 2 mm团聚体含量，提升幅度为57.89%~78.95%； B6处理显著增加>2 mm团聚体含量，增加量为44.44%，但降低了<0.053 mm团聚体含量。与对照相比，B3处理显著提高平均重量直径（MWD）和几何平均直径（GMD），分别提升幅度为16.25%和22.64% ；B6处理显著提高大于0.25 mm团聚体含量（R0.25）、MWD和GMD，分别提升了6.15%、23.75% 和33.96%，但分形维数（D）降低5.44%。与CK相比，B3和B6处理均显著促进土壤总有机碳（SOC）含量的积累，分别提高66.37%和162.85%；B1和B3处理显著提高了<0.053 mm微团聚体有机碳贡献率，分别提升105.45%和74.88%；B6处理显著提高了1~2 mm团聚体有机碳贡献率，提升59.46%。不同量生物炭处理均显著提高<0.053 mm团聚体有机碳含量，表现为B6>B3>B1，并显著提高0.5~1 mm和0.053~0.25 mm团聚体易氧化有机碳（EOC）含量。土壤SOC和R0.25、GMD和MWD呈显著正相关关系，与D值呈显著负相关关系（P<0.05）。【结论】综上所述，施加3%和6%生物炭处理能显著促进砂姜黑土中水稳性大团聚体的形成，提高土壤SOC和EOC含量，进而改善土壤结构，提升土壤质量，有利于砂姜黑土障碍因子的消减。 |
| 英文摘要: |
| 【Objective】 In this study，we investigated the effects of biochar on soil aggregate stability and organic carbon distribution in shajiang black soil， and the results of the study can provide scientific support for improving the quality and soil structure of shajiang black soil.【Method】 Four treatments， CK (no biochar)，B1 (1% biochar，biochar accounts for 1% of the total weight of biochar and soil. The same below)，B3 (3% biochar) and B6 (6% biochar)，were set up in a soil column incubation test using shajiang black soil as the experimental material，so as to investigate the effects of different amounts of biochar application on the soil aggregate stability characteristic and organic carbon distribution in shajiang black soil.【Result】The application of 3% and 6% biochar significantly increased the 1~2 mm agglomerate content by 57.89% to 78.95% compared to CK. B6 significantly increased>2 mm agglomerate content by 44.44%，but decreased<0.053 mm agglomerate content. The B3 treatment significantly increased mean weight diameter (MWD) and geometric mean diameter (GMD) by 16.25% and 22.64%，respectively，compared to the control. Compared to CK，B6 treatment significantly increased>0.25 mm agglomerate content (R0.25)，MWD and GMD by 6.15%，23.75% and 33.96%，respectively，but decreased fractal dimension (D) by 5.44%. Compared with CK，the B3 and B6 treatments significantly promoted soil total organic carbon (SOC) accumulation by 66.37% and 162.85%，respectively. B3 and B6 treatments significantly promoted SOC accumulation by 66.37% and 162.85%，respectively，compared to CK. Compared to CK，the B1 and B3 treatments significantly increased the organic carbon contribution of<0.053 mm microaggregates by 105.45% and 74.88%，respectively，while the B6 treatment significantly increased the organic carbon contribution of 1~2 mm aggregates by 59.46%. Different amounts of biochar treatments significantly increased the organic carbon content of<0.053 mm agglomerates as B6> B3> B1，and significantly increased the easily oxidised organic carbon (EOC) content of 0.5~1 mm and 0.053~0.25 mm agglomerates. There was a significant positive correlation between SOC content and R0.25，GMD and MWD，and a significant negative correlation with D value (P<0.05). 【Conclusion】The application of 3% and 6% biochar significantly promoted the formation of water-stable macroaggregates as well as the increase of soil SOC and EOC content，which improved the soil structure，enhanced the soil quality，and facilitated the abatement of obstacle factors in shajiang black soil. |
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