| 张可欣, 倪祥银, 杜琳, 卫芯宇, 杨静, 吴福忠.杉木和米槠人工林土壤可溶性碳组分动态及其对凋落叶输入的响应[J].水土保持学报,2023,37(2):260~266 |
| 杉木和米槠人工林土壤可溶性碳组分动态及其对凋落叶输入的响应 |
| Dynamics of Soil Soluble Carbon Components and Their Responses to Foliar Litter in Castanopsis carlesii and Cunninghamia lanceolata Plantation |
| 投稿时间：2022-07-21 |
| DOI：10.13870/j.cnki.stbcxb.2023.02.030 |
| 中文关键词: 土壤可溶性碳 土壤热水溶性碳 凋落叶 亚热带人工林 土壤碳循环 |
| 英文关键词: soil dissolved organic carbon soil hot water-soluble organic carbon litter subtropical plantation soil carbon cycle |
| 基金项目:国家自然科学基金项目(32171641,31922052) |
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| 摘要点击次数: 42 |
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| 中文摘要: |
| 可溶性碳组分是土壤有机碳库中最活跃的部分,作为土壤碳周转初期变化的敏感指标,其含量受到凋落叶等植物残体输入、森林类型及季节性水热变化的共同调节。采用土壤原位培养法,以亚热带米槠(Castanopsis carlesii)人工林与杉木(Cunninghamia lanceolata)人工林为对象,分析生长季内土壤可溶性碳(DOC)与热水溶性碳(HWSC)含量动态变化及其对凋落叶输入的响应趋势。结果表明,凋落叶输入、森林类型和培养月份均极显著影响土壤可溶性碳组分含量(p＜0.001)。杉木人工林土壤DOC与HWSC含量整体较高,分别高出米槠人工林15.09%和13.06%,但后者的土壤可溶性有机质芳香化程度更高。经过1个生长季的培养,2种人工林土壤DOC与HWSC含量均明显增加。凋落叶增加生长季米槠人工林土壤DOC与HWSC的含量,但对杉木人工林的影响具有季节差异。研究结果表明杉木人工林土壤DOC与HWSC含量更高,但凋落叶输入促进米槠人工林DOC与HWSC含量,更易于随淋溶过程流失。 |
| 英文摘要: |
| Soil soluble carbon is the most active part of soil organic carbon pool,which is often used as a sensitive indicator for the initial change of soil carbon turnover,but its content is jointly regulated by plant litter input,forest type,and seasonal variation of water and heat.The monthly dynamics of soil dissolved organic carbon (DOC) and hot water-soluble carbon (HWSC) contents and their responses to litter input during the growing season were analyzed by carrying out a field situ incubation experiment of two plantations (Castanopsis carlesii and Cunninghamia lanceolata/Chinese fir) in subtropical China.The results showed that litter input,forest type and monthly climate significantly affected the content of soil soluble carbon components (p＜0.001).Soil DOC and HWSC contents in Chinese fir plantation were higher than those of Castanopsis carlesii plantation by 15.09% and 13.06%,respectively,but the degree of aromatation of soil soluble organic matter was higher in Castanopsis carlesii plantation.After one growing season of incubation,soil DOC and HWSC contents increased significantly in both plantations.Litter increased soil DOC and HWSC contents in Castanopsis carlesii plantation during the growing season,but which in Chinese fir plantation displayed seasonal difference.These results indicated that soil DOC and HWSC contents were higher in Chinese fir plantation than Castanopsis carlesii plantation,but litter could promoted the DOC and HWSC contents of Castanopsis carlesii plantation,which would be easy to be lost during leaching. |
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