广西师范大学学报（自然科学版） ›› 2024, Vol. 42 ›› Issue (1): 180-190.doi: 10.16088/j.issn.1001-6600.2023020701

• 研究论文 • 上一篇    下一篇

生物炭对毛竹林土壤有机碳组分及碳库管理指数的影响

丁苏雅1,2,3, 马姜明1,2,3*, 覃云斌1,2,3*, 黄芳玲1,2,3, 宋丽丽1,2,3, 刘文清1,2,3, 李梦霞1,2,3, 何昕诺1,2,3   

  1. 1.珍稀濒危动植物生态与环境保护教育部重点实验室(广西师范大学),广西 桂林 541006;
    2.广西漓江流域景观资源保育与可持续利用重点实验室(广西师范大学),广西 桂林 541006;
    3.广西师范大学 可持续发展创新研究院,广西 桂林 541006
  • 收稿日期:2023-02-07 修回日期:2023-04-27 出版日期:2024-01-25 发布日期:2024-01-19
  • 通讯作者: 马姜明(1976—),男,江西永新人,广西师范大学教授,博士。E-mail:mjming03@163.com; 覃云斌(1990—),男,广西桂林人,广西师范大学讲师,博士。E-mail:shuibaoqinyunbin@163.com
  • 基金资助:
    广西科技重大专项课题(桂科AA20161002-1);广西重点研发计划项目(桂科AB21220057);广西科技基地和人才专项(桂科AD21220163)

Effects of Biochar on Soil Organic Carbon Composition and Carbon Pool Management Index of Moso Bamboo Forests

DING Suya1,2,3, MA Jiangming1,2,3*, QIN Yunbin1,2,3*, HUANG Fangling1,2,3, SONG Lili1,2,3, LIU Wenqing1,2,3, LI Mengxia1,2,3, HE Xinnuo1,2,3   

  1. 1. Key Laboratory of Ecology and Environmental Protection of Rare and Endangered Animals and Plants (Guangxi Normal University), Ministry of Education, Guilin Guangxi 541006, China;
    2. Key Laboratory of Conservation and Sustainable Utilization of Landscape Resources in Li River Basin (Guangxi Normal University), Guilin Guangxi 541006, China;
    3. Institute of Sustainable Development Innovation, Guangxi Normal University, Guilin Guangxi 541006, China
  • Received:2023-02-07 Revised:2023-04-27 Online:2024-01-25 Published:2024-01-19

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摘要： 为探究不同生物炭施用量对毛竹林土壤有机碳组分及碳库管理指数的影响,本研究以广西桂林漓江上游毛竹林土壤为研究对象,以毛竹废弃物高温热解制备的生物炭为供试材料,通过一年野外施用试验,探究不同生物炭施用量下(0(CK)、10 t·hm-2(BC1)、20 t·hm-2(BC2)、40 t·hm-2(BC4))毛竹林土壤有机碳活性组分和土壤碳库管理指数变化特征,分析环境因素对其影响。结果表明:与对照(CK)相比,高添加量生物炭(BC4)后土壤pH值、速效磷、速效钾、铵态氮、可溶性有机氮、微生物量氮等含量显著提高,但土壤全磷含量显著降低(P<0.05)。生物炭对总有机碳、易氧化有机碳、颗粒有机碳及碳库管理指数等有显著的促进作用,均在生物炭施用量为40 t·hm-2时达到最大值。相关分析表明,土壤碳库管理指数与pH、NH+4-N、EOC、POC均呈极显著正相关关系(P<0.01)。路径分析模型表明在生物炭添加下,土壤性质和可利用性养分直接影响活性碳组分,进而影响土壤碳库管理指数。综上所述,毛竹林中施用生物炭是提高土壤质量、促进土壤碳固存及合理利用竹林废弃物的有效手段,其中生物炭添加量为40 t·hm-2的处理效果最优。

关键词: 毛竹林, 生物炭, 土壤有机碳, 碳库管理指数, 活性有机碳

Abstract: To explore the effects of different biochar application amounts on soil organic carbon components and carbon pool management index of moso bamboo forests, this study took the soil of the moso bamboo forests in the upper reaches of the Lijiang River as objects, and the biochar from high-temperature pyrolysis of bamboo waste materials as test materials. After the one-year field application experiment in the moso bamboo forests, the changed characteristics of soil active organic carbon components and soil carbon pool management index under different biochar application amounts (0 (CK), 10 t·hm-2 (BC1), 20 t·hm-2 (BC2), 40 t·hm-2 (BC4)) were measured, and the impact of environmental factors on them were analyzed. The results showed that: the high additive amounts of the biochar (BC4) significantly increased the contents of soil pH, available phosphorus, available potassium, ammonium nitrogen, soluble organic nitrogen, and microbial biomass nitrogen to compare with that of the control treatment (CK), but significantly decreased soil total phosphorus content (P<0.05). Biochar could significantly promote the total organic carbon, easily oxidized organic carbon, particulate organic carbon and carbon pool management index. All of them reached the maximum at the treatment of BC4. The correlation analysis showed that the soil carbon pool management index was positively related to pH, NH+4-N, EOC, and POC (P<0.01). A path analysis model found that soil properties and available nutrients directly affected the active carbon components, and then indirectly affected the soil carbon pool management index after adding the biochar. In summary, the application of biochar in the moso bamboo forests was an effective pathway to improve soil quality, promote soil carbon sequestration and appropriately use bamboo waste materials. The best effect in the studied area was the treatment of biochar amount with 40 t·hm-2.

Key words: moso bamboo forest, biochar, soil organic carbon, carbon pool management index, active organic carbon

中图分类号:  S714.5

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