| 林分密度对毛乌素沙地樟子松人工林林分结构和林下植被的影响 |
| |
| 引用本文： | 代青格乐,赵国平,王新星,邓继峰,丁国栋,赵媛媛,毛振华.林分密度对毛乌素沙地樟子松人工林林分结构和林下植被的影响[J].水土保持通报,2015,35(6):86-91. |
| |
| 作者姓名： | 代青格乐 赵国平 王新星 邓继峰 丁国栋 赵媛媛 毛振华 |
| |
| 作者单位： | 北京林业大学 水土保持学院 水土保持与荒漠化防治教育部重点实验室, 北京 100083;陕西省治沙研究所, 陕西 榆林 719000;北京林业大学 水土保持学院 水土保持与荒漠化防治教育部重点实验室, 北京 100083;北京林业大学 水土保持学院 水土保持与荒漠化防治教育部重点实验室, 北京 100083;北京林业大学 水土保持学院 水土保持与荒漠化防治教育部重点实验室, 北京 100083;北京林业大学 水土保持学院 水土保持与荒漠化防治教育部重点实验室, 北京 100083;内蒙古鄂尔多斯市水土保持工作站, 内蒙古 鄂尔多斯 017000 |
| |
| 基金项目： | 国家重点基础科学(973)研究发展计划"植物固沙的生态水文过程、机理及调控"(2013CB429906);国家林业局公益性行业科研专项经费项目(201304325);"十二五"国家科技支撑计划资助项目(2012BAD16B02) |
| |
| 摘 要： | 目的]研究不同密度下,樟子松人工林林分结构和林下物种多样性的变化,以期为毛乌素沙地以樟子松为建群种的植物固沙模式提供理论依据。方法]以毛乌素沙地榆林地区5种不同密度25a生樟子松人工林为研究对象,采用样方调查和测试分析法,探究樟子松人工林林分结构和林下物种多样性随林分密度的变化特征。结果]樟子松人工林密度与平均胸径呈幂函数递减关系,与高径比呈显著的线性正相关关系。樟子松人工林林下共出现植物8科13属16种。草本以禾本科的狗尾草为优势种,草本丰富度、多样性指数随着密度的不断减小,表现出明显的增加趋势。林分密度与物种丰富度指数、多样性指数呈显著的负相关关系,Shannon多样性指数对密度变化最为敏感。结论]毛乌素沙地樟子松人工林的林分密度与林分结构、林下物种多样性的相关关系十分显著,可以将林下物种多样性指数作为衡量林分密度是否合理的参考指标。
|
| 关 键 词： | 毛乌素沙地 樟子松 林分密度 种群结构 物种多样性 |
| 收稿时间： | 2014/8/20 0:00:00 |
| 修稿时间： | 2014/8/26 0:00:00 |
Effects of Stand Density on Stand Structure and Understory Vegetation of Pinus Sylvestris Plantations in Mu Us Sandland |
| |
| Daiqing Gele,ZHAO Guoping,WANG Xinxing,DENG Jifeng,DING Guodong,ZHAO Yuanyuan and MAO Zhenhua.Effects of Stand Density on Stand Structure and Understory Vegetation of Pinus Sylvestris Plantations in Mu Us Sandland[J].Bulletin of Soil and Water Conservation,2015,35(6):86-91. |
| |
| Authors: | Daiqing Gele ZHAO Guoping WANG Xinxing DENG Jifeng DING Guodong ZHAO Yuanyuan and MAO Zhenhua |
| |
| Institution: | School of Soil & Water Conservation, Key Lab of Soil & Water Conservation and Desertification Combating, Ministry of Education, Beijing Forestry University, Beijing 100083, China;Desert Control Research Institute of Shaanxi Province, Yulin, Shaanxi 719000, China;School of Soil & Water Conservation, Key Lab of Soil & Water Conservation and Desertification Combating, Ministry of Education, Beijing Forestry University, Beijing 100083, China;School of Soil & Water Conservation, Key Lab of Soil & Water Conservation and Desertification Combating, Ministry of Education, Beijing Forestry University, Beijing 100083, China;School of Soil & Water Conservation, Key Lab of Soil & Water Conservation and Desertification Combating, Ministry of Education, Beijing Forestry University, Beijing 100083, China;School of Soil & Water Conservation, Key Lab of Soil & Water Conservation and Desertification Combating, Ministry of Education, Beijing Forestry University, Beijing 100083, China;Ordos Soil & Water Conservation Station, Ordos, Inner Mongolia 017000, China |
| |
| Abstract: | Objective] Pinus sylvestris is considered to be one of the preferred coniferous species in the Mu Us sandland afforestation. Studying the effect of stand density on the stand structure and understory vegetation development in order to provide important support for the stabilization of sands by afforestation in this region.Methods] We selected the Pinus sylvestris plantations of 25 years old at different densities in Yulin City, and analyzed the changes in plantation structure and understory species diversity of Pinus sylvestris plantations with variations in stand density.Results] The results showed the stand density and average diameter followed exponential relationship. And the height to diameter ratio showed a significant positive linear correlation with stand density. A total of 16 understory plant species were recorded, belonging to 13 genera and 8 families. Gramineae of foxtail grass was dominant species. Herbal species richness and diversity index showed an obvious increasing trend with decreasing density. The stand density was negatively correlated with the species richness and diversity index. Shannon diversity index was the most sensitive to changes in density.Conclusion] In the management of Pinus sylvestris plantations in Mu Us sandland, the understory species diversity index can be seen as an indicator of the suitability of stand density. |
| |
| Keywords: | Mu Us sandland Pinus sylvestris plantations stand density stand structure species diversity |
| 本文献已被 CNKI 等数据库收录！ |
| 点击此处可从《水土保持通报》浏览原始摘要信息 |
| 点击此处可从《水土保持通报》下载免费的PDF全文 |
|
