摘要
晋西黄土区具有典型的残塬沟壑地貌特征,该地区植被恢复时间较长,探究植被恢复对土壤理化性质的长期影响,以及开展环境因子长期定位观测,对实现区域生态修复与保护具有重要意义。以晋西黄土区四种典型植被恢复林地(辽东栎次生林地、刺槐人工林地、油松人工林地、侧柏人工林地)为研究对象,测定2006年、2012年、20017年不同土层(0—10 cm、10—20 cm、20—40 cm、40—60 cm、60—80 cm、80—100 cm)土壤理化性质(有机碳、全氮、全磷、全钾、酸碱度、土壤容重、砂粒、粉粒、黏粒),采用主成分分析、冗余分析、相关性分析等统计方法,探讨长期植被恢复下土壤中各因子的变化和相互作用规律,分析不同植被类型对土壤属性时空异质性的影响。结果表明:在长期植被恢复过程中,不同林分土壤有机碳和全氮含量会表现为初期增加,然后下降。土壤全钾和全磷含量则是先减少后增加,植被恢复增强了土壤有机碳和全氮的积累。土壤的酸碱度、容重、砂粒、粉粒、黏粒的变化则不明显,这些属性在植被恢复期内受到的外部影响较小。总体来说,长期植被恢复增加了土壤养分含量、土壤砂粒、土壤粉粒,降低土壤容重、土壤黏粒。相比人工林,辽东栎次生林改善土壤结构、增加土壤肥力的效果最好。冗余分析表明,不同植被类型长期恢复条件下,影响土壤养分含量最主要的属性存在差异,刺槐的土壤粉粒、侧柏的土壤容重对多年土壤养分变化的贡献度最高。本研究结果可为黄土残塬区的长期植被恢复实践工作的生态效益评估提供数据支持和理论依据。
The loess region of western Shanxi has typical geomorphological features of the eroded tableland gully.The duration of vegetation restoration in this area has a relatively long history.Exploring the long⁃term effects of vegetation restoration on soil physical and chemical properties,as well as carrying out long⁃term field observation of environmental factors,has significant implications and supports for achieving regional ecological restoration and protection.This study selected four typical vegetation restoration forests(i.e.secondary forest of Quercus wutaishanica Mayr,artificial forest of Robinia pseudoacacia L.,artificial forest of Pinus tabuliformis Carr.,and artificial forest of Platycladus orientalis)in the loess region of western Shanxi as the research objects.The soil physical and chemical properties of different soil layers(0—10 cm,10—20 cm,20—40 cm,40—60 cm,60—80 cm,80—100 cm)were measured in 2006,2012,2017,including organic carbon,total nitrogen,total phosphorus,total potassium,pH,soil bulk density,sand,silt,clay.The statistical methods such as principal component analysis(PCA),redundant analysis(RDA)and correlation analysis were used to explore interactions among various factors in the soil under long⁃term vegetation restoration,and analyze the effects of vegetation types on spatiotemporal heterogeneity of soil properties.The results showed that during the long⁃term vegetation restoration process,soil organic carbon and total nitrogen contents in different forests initially increased then decreased,while soil total potassium and total phosphorus contents decreased at first stage and then increased.Vegetation restoration enhanced the accumulation of soil organic carbon and total nitrogen.Changes in soil pH,bulk density,sand,silt,and clay measurements were not noticeable—these properties were less influenced by external factors during the vegetation recovery period.Overall,long⁃term vegetation restoration increased the content of soil nutrients,soil sand,and soil silt,while redu
作者
于航
冯天骄
卫伟
王平
YU Hang;FENG Tianjiao;WEI Wei;WANG Ping(School of Soil and Water Conservation,Beijing Forestry University,Beijing 100083,China;Jixian National Forest Ecosystem Observation and Research Station,Jixian 042200,China;State Key Laboratory of Urban and Regional Ecology,Research Center for Eco-Environmental Sciences,Chinese Academy of Sciences,Beijing 100085,China)
出处
《生态学报》
CAS
CSCD
北大核心
2024年第7期2873-2885,共13页
Acta Ecologica Sinica
基金
国家自然科学基金(52179056,41901021)
中央高校基本科研业务费专项资金资助(QNTD202303)。
关键词
植被恢复
黄土高原
土壤理化性质
土壤综合肥力
vegetation restoration
the Loess Plateau
physical and chemical properties of soil
comprehensive fertility of soil
