Journal of Guangxi Normal University(Natural Science Edition) ›› 2024, Vol. 42 ›› Issue (1): 180-190.doi: 10.16088/j.issn.1001-6600.2023020701

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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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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

CLC Number:  S714.5
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