ZHU Jinfang,LI Junsheng,ZHAO Caiyun,et al.Effects of Different Vegetation Restoration Years on Soil Water Storage Ability in the Habitats Invaded by Chromolaena odorata in Karst Area[J].Research of Soil and Water Conservation,2019,26(01):143-147,154.
不同植被修复年限对喀斯特地区飞机草入侵生境土壤蓄水能力的影响
- Title:
- Effects of Different Vegetation Restoration Years on Soil Water Storage Ability in the Habitats Invaded by Chromolaena odorata in Karst Area
- Keywords:
- vegetation restoration; Chromolaena odorata; karst area; soil physical property; soil water storage ability
- 分类号:
- S792.25
- 摘要:
- 飞机草是我国西南地区的主要外来有害入侵杂草，植被替代修复技术是控制飞机草入侵的主要方式之一，目前对于不同植被修复年限下的土壤蓄水能力变化鲜有研究。以"空间代替时间"的方法，分析了不同植被修复年限的生境中土壤物理性质和蓄水能力的变化，探讨不同植被修复年限对广西喀斯特地区飞机草入侵生境土壤蓄水能力的影响。结果表明：在喀斯特地区飞机草入侵生境下土壤物理性质在植被修复过程中得到明显改善，主要表现为随植被修复年限的增加，土壤容重逐渐降低，土壤孔隙度逐渐升高，其中土壤非毛管孔隙度受植被修复年限的影响显著，而毛管孔隙度受植被修复年限的影响相对较小；土壤蓄水能力在植被修复过程中得到明显提高，土壤滞留蓄水量和饱和蓄水量随着植被修复年限的增加逐渐升高，修复10 a后分别比未修复生境增加了174.9%和11.6%，而土壤吸持蓄水量受植被修复年限影响较小，在修复过程中无显著变化。因此，植被修复能够显著提高喀斯特地区飞机草入侵生境的土壤蓄水和涵养水源的能力，降低水土流失，促进入侵地的植被恢复，为外来植物入侵生态系统修复提供重要的技术理论依据。
- Abstract:
- Chromolaena odorata is one of the main invasive alien weeds in southwest of China. Vegetation replacement restoration is one of the dominant methods to control the C.odorata invasion. However, there was less study on the changes of soil water storage ability in different restoration years. The method of space instead of time was employed to analyze the variations of soil physical property and water storage ability in different restoration years and discuss the effect of different vegetation restoration years on soil water storage ability in C.odorata invasive habitat along karst area in Guangxi. The results showed that the soil physical property was clearly improved during the vegetation restoration process, which showed that the soil bulk density in C.odorata invasive habitat decreased gradually and soil porosity increased with restoration years; soil non-capillary porosity was significantly affected by the vegetation restoration years, however, the soil capillary porosity was less affected; the soil water storage ability was significantly improved following the restoration. Soil non-capillary water-holding capacity and water saturated water content increased with the restoration years, which were higher by 174.9% and 11.6%, respectively, in habitat after 10 years’ restoration than those in CK, while the capillary water-holding capacity was relatively less affected by the ecological restoration and had no significant variation during the restoration process. In conclusion, the vegetation restoration could significantly improve the soil water conservation property in C.odorata invasive habitat of karst area, which reduced the soil erosion and improved the vegetation recovery, and provided important technical and theoretic references for invasive habitats restoration.
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备注/Memo
收稿日期:2018-1-18;改回日期:2018-3-29。
基金项目:国家重点研发计划项目（2016YFC1201100）；国家自然资助项目（41701026）
作者简介:朱金方(1986-),男,山东曹县人,博士,助理研究员,主要从事水土保持与植被恢复研究。E-mail:zhujf@craes.org.cn
通讯作者:李俊生(1968-),男,安徽巢湖人,博士,研究员,主要从事生物多样性研究。E-mail:lijsh@craes.org.cn