| 吴 慧，赵志忠，吴 丹.海南西部热带雨林次生林土壤易氧化有机碳分布特征及影响因素[J].广东农业科学,2022,49(6):74-80 |
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海南西部热带雨林次生林土壤易氧化有机碳分布特征及影响因素 |
| Distribution Characteristics and Influencing Factors ofSoil Readily Oxidized Organic Carbon of SecondaryRainforests in Western Hainan Province |
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| DOI：10.16768/j.issn.1004-874X.2022.06.010 |
| 中文关键词: 热带雨林 次生林 土壤易氧化有机碳 总有机碳 理化性质 |
| 英文关键词: rainforest secondary forest readily oxidized organic carbon soil organic carbon physiochemical property |
| 基金项目:海南省院士创新平台项目（YSPTZX202024）；海南省研究生创新项目（Qhys2021-299） |
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| 中文摘要: |
| 【目的】研究土壤易氧化有机碳（ROC）的分布特征及其主要影响因素，为提高热带雨林“固碳”
能力和缓解全球气候变暖方面提供科学依据。【方法】以海南省西部尖峰岭、霸王岭、鹦哥岭外围次生林的土
壤作为研究对象，在分析其土壤总有机碳（SOC）特征的基础上，运用相关分析和线性回归分析探讨区域内土壤
ROC 的分布规律及与环境因素的相关性。【结果】尖峰岭、霸王岭、鹦哥岭次生林土壤 ROC 含量排序为尖峰岭
< 霸王岭 < 鹦哥岭，与 SOC 含量分布特征变化规律一致。在土壤垂直剖面上，土壤 ROC 含量随着土层的增加而
逐渐减小；0~10 cm 土层 ROC 含量与 10~30、30~50 cm 土层差异显著；土壤 0~50 cm 剖面 ROC 分配比例表现为：
霸王岭 > 鹦哥岭 > 尖峰岭。尖峰岭和霸王岭 ROC 含量与粉粒 + 黏粒呈极显著负相关，而鹦哥岭 ROC 含量与粉
粒 + 黏粒呈极显著正相关。尖峰岭、霸王岭、鹦哥岭 3 座山地 pH 值与 ROC 均为显著相关，ROC 含量与 pH 值
的相关性强弱大小依次为霸王岭 > 鹦哥岭 > 尖峰岭。【结论】次生林 ROC 含量不仅受 SOC 含量的影响，土壤理
化性质（pH、土壤质地分布）、土壤总有机碳等多个环境要素也对区内土壤次生林 ROC 的分布起到一定的决定
性作用。 |
| 英文摘要: |
| 【Objective】The distribution characteristics and influencing factors of soil readily oxidized organic
carbon (ROC) were investigated in order to provide a scientific basis for improving the“carbon sequestration”capacity of
tropical rainforests and alleviating global warming.【Method】The soil of the peripheral secondary forests of Jianfengling,
Bawangling and Yinggeling in western Hainan Province was used as the research object. Based on the analysis of soil organic
carbon (SOC) characteristics, correlation analysis and linear regression analysis were used to explore the corelation between
the distribution laws of soil ROC and the environmental factors in the study regions.【Result】ROC content in soil of
secondary forests ranked as: Jianfengling < Bawangling < Yinggeling, which was consistent with the law of the distribution characteristics of the SOC. On the vertical profiles of soil, the ROC content gradually decreased with the increase in soil depths.
The ROC content in the 0-10 cm soil layer was significantly different from that in the 10-30 cm and 30-50 cm soil layers.
The proportion of ROC in the 0-50 cm profile was showed as: Bawangling >Yinggeling >Jianfengling. There was an extremely
significant and negative correlation between ROC with silt and clay soil on Jianfengling and Bawangling, and was an extremely
significant and positive correlation between ROC with silt and clay soil on Yinggeling. Both the pH value and ROC content
of these three mountains were extremely significantly correlated. The correlation between ROC content and pH value ranked
as: Bawangling > Yinggeling > Jianfengling. 【Conclusion】The ROC content of secondary forests is not only affected by the
soil organic carbon content, but also by a number of environmental factors such as soil physiochemical properties (pH, soil
texture distribution), soil total organic carbon and other environmental factors, which also play a certain role in determining the
distribution of ROC in soil of secondary forests. |
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