| 陈 灿1，林勇明1，林 宇2，洪 滔1，李 键1，吴承祯3，沈少丽1.沿海湿地松防护林粗木质残体特征研究[J].广东农业科学,2016,43(8):86-93 |
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沿海湿地松防护林粗木质残体特征研究 |
| Characteristics of coarse woody debris（CWD） in a coast protection forest of Pinus elliottii in China |
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| DOI：10.16768/j.issn.1004-874X.2016.08.015 |
| 中文关键词: 粗木质残体 沿海防护林 湿地松 福州 |
| 英文关键词: Coarse Woody Debris Coast protection forest Pinus Elliottii Fuzhou |
| 基金项目:教育部高等学校博士学科点专项科研基金（20123515110011）；福建省自然科学基金（2015J05048）；福建省高水平大学建设基金（61201400810） |
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| 摘要点击次数: 1759 |
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| 中文摘要: |
| 粗木质残体（CWD）是森林生态系统重要的结构、功能要素和生物地球化学循环过程研究中不可或缺环节。对我国重要沿海防护林之一的湿地松林CWD 的胸径、长度、材积和腐烂等级等进行统计分析，结果表明：沿海湿地松防护林CWD 占现存木的5.45（±6.39）%，径级分布平均介于2.5～17.5cm；长度分布在0～20 m，但主要集中分布在0～2.4 m；材积分布于0～0.14 m3；腐烂等级1 级最少，3 级最多，平均分布于3.0～3.4 级。CWD 贮量主要由数量和长度共同决定，而与腐烂等级间相关性不显著。风等外力影响仍是湿地松防护林粗木质残体形成的主要原因，各级湿地松在腐烂的分解过程存在细微差异，幼龄林阶段仍是受到风害成倒伏的主要时期。研究结果为湿海防护林生态系统的经营和保护提供了理论依据。 |
| 英文摘要: |
| Coarse woody debris（CWD） is a crucial structure and function element of forest ecosystem as well as the indispensible link of researching biogeochemical cycle process，and Pinus elliottii is one of the most important coast protection forest species in China. The distributions of diameter at breast height（DBH），length，volume of wood ，and decay rank of CWD in the coast protection forest of P. elliottii in China were counted and analyzed. The results showed that the timber of CWD accounted for 5.45（ ±6.39）% of the existing living wood. DBH of CWD distributed at the range of 2.5-17.5 cm evenly in general. The range of tree length of CWD was from 0 to 20 m，most of which were less than 2.4 m. The distribution of wood volume of CWD was from 0 to 0.14 m3. In addition，Level 1 was the least while Level 3 was the most in decay rank with a distribution between 3.0-3.4. The storage of CWD mainly depends on quantity and length，but have no significant relations with decomposition extent. Wind and other outside forces are the main reasons of the production of CWD in a coast protection forest of Pinus Elliottii. Young stage of a coast forest is still a critical period and the decomposition processes were a little different. The results provided a theoretical basis for the management and protection of the coastal protection forest ecosystem in China. |
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