LIANG Meixia,CHEN Zhibiao,CHEN Zhiqiang,et al.Ecological Restoration Effects of Soil and Dicranopteris pedata Under Different Activities in Benggang[J].Research of Soil and Water Conservation,2021,28(06):138-143.
不同活动状况崩岗崩壁土壤及芒萁的生态恢复效应
- Title:
- Ecological Restoration Effects of Soil and Dicranopteris pedata Under Different Activities in Benggang
- 文章编号:
- 1005-3409(2021)06-0138-06
- 分类号:
- S154.1
- 文献标志码:
- A
- 摘要:
- 为揭示在植被自然恢复过程中崩岗系统的生态恢复效应以及植物对于恶劣环境的适应机制，选取福建省长汀县濯田镇黄泥坑崩岗群的3种不同活动状况崩岗样地，应用生态化学计量学方法分析了其崩壁部位土壤养分和芒萁植物养分含量的变化特征及相关性。结果表明:同一活动状况崩岗崩壁不同部位土壤养分普遍达到显著性差异(p<0.05); 不同活动状况崩岗崩壁土壤肥力有所提升，均在崩岗Ⅲ(稳定型)达最大值，但土壤有机碳、全氮、全磷含量仅有3.88，0.44，0.06 g/kg，远远低于全国土壤养分平均含量。崩壁芒萁三大营养器官的C，N，P普遍存在显著差异(p<0.05)，但其体内养分含量与土壤表层中养分含量的相关性不大。可见，随着地表植被覆盖提高，崩岗的活动状况逐渐稳定，崩壁土壤养分含量有所增加，仍处于极度低下水平。芒萁植物受土壤养分的影响较小，能通过调节自身的养分适应贫瘠的恶劣生境，可作为改善南方红壤侵蚀区崩岗系统土壤肥力的重要措施。
- Abstract:
- The purpose of this study is to reveal the ecological restoration effect of Benggang in the process of vegetation natural restoration and the adaptation mechanism of plants to the harsh environment. Taking 3 Benggangs in Huangnikeng，Zhuotian Town，Changting County of Fujian Province representing 3 different active situations(active，semi-stable，and stable)as the study cases，we analyzed the ecological stoichiometric characteristics and correlations of soil and plant nutrient content under the process of natural vegetation restoration by using ecological stoichiometric methods. The results showed that the soil nutrients in different parts of collapse wall were significantly different(p<0.05); the stable Benggang's soil organic C，total N and total P contents were the highest in the 3 Benggangs，but they were only up to 3.88 g/kg，0.44 g/kg，0.06 g/kg，which were far below the national level; the contents of C，N，P in Dicranopteris pedata were significantly different(p<0.05); however，the correlations between C，N and P contents in plants and those in soil surface were not very relevant(p>0.05). It can be concluded that with the increase of vegetation coverage，the activity of Benggang gradually stabilized and the soil fertility could be improved but only be at the low level. Additionally，the Dicranopteris pedata nutrient was not mainly determined by soil nutrient，but mainly affected by the characteristics of the plant itself，which showed the adaptability of the plant to the extremely degraded ecosystem environment and could be used as an important measure to improve soil fertility of Benggang system in red soil erosion area of southern China.
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备注/Memo
收稿日期:2020-08-19 修回日期:2020-12-08资助项目:国家重点研发计划(2016YFC0502905); 福建省科技厅高校产学合作项目(2020N5007); 福建省科技厅自然基金面上项目(2020J01780); 泉州市科技计划项目(2018Z025)第一作者:梁美霞(1981—)，女，福建南安人，博士研究生，副教授，主要从事水土保持、生态恢复研究。E-mail:lmx2003440@163.com通信作者:陈志彪(1962—)，男，福建平潭人，博士，教授，主要从事水土保持、自然资源与环境研究。E-mail:chenzhib408@vip.163.com