文献类型：期刊文献

中文题名：三峡库区水位消落植被土壤pH、阳离子含量随海拔及年际的动态特征

英文题名：Altitude and Interannual Dynamics of Soil pH Value and Cation Contents in Water-level-fluctuating Vegetation Zone in Three Gorges Reservoir Area

作者：王丽君[1] 程瑞梅[1,2] 肖文发[1,2] 杨邵[1] 沈雅飞[1,2] 郭燕[1] 雷蕾[1,2] 曾立雄[1,2]

第一作者：王丽君

机构：[1]中国林业科学研究院森林生态环境与保护研究所,国家林业和草原局森林生态环境重点实验室,北京100091;[2]南京林业大学南方现代林业协同创新中心,江苏南京210037

年份：2021

卷号：34

期号：2

起止页码：12-23

中文期刊名：林业科学研究

外文期刊名：Forest Research

收录：CSTPCD;;Scopus;北大核心:【北大核心2020】；CSCD:【CSCD2021_2022】；

基金：中国林科院基本科研业务费专项(CAFYBB2017ZA002);十三五国家重点研发计划项目(2017YFC050530402)。

语种：中文

中文关键词：三峡库区;消落带;土壤pH值;金属元素;年际变化

外文关键词：Three Gorges Reservoir area;water-level-fluctuating zone;soil pH value;metal element;interannual variation

分类号：S718.5

摘要：[目的]分析三峡水库运行10年间(2008-2018年),消落带不同海拔区段(145~155 m、155~165m、165~175 m)土壤pH值和金属元素含量变化特征,为消落带分区段监测治理及库区土壤环境质量演变预测提供科学依据。[方法]根据三峡水库运行调度特征,在秭归县典型消落带区域内选择3块生境类型相似的次生灌丛样地,测定2008、2009、2012、2014、2015、2016、2018年不同海拔区段表层(0~20 cm)土壤的p H值和金属元素含量,分析其在不同海拔区段和年际间的差异及变化。[结果](1)随着水库水位的周期性涨落,2008—2018年间消落带区域土壤pH值、金属元素钾、钙、镁含量的年际变化均呈现出波动式增加的趋势,铁、锰、锌含量呈现波动式下降的趋势,钠含量则呈现逐年下降的趋势。(2)在各年份的不同海拔高程间,土壤p H值和钾含量呈现145~155 m>155~165 m>165~175 m海拔的特征,铁、锰含量呈现出145~155 m<155~165 m<165~175 m海拔的特征,钙含量在145~155 m海拔区段富集,钠、镁、锌含量则无明显的海拔分布差异。至2018年,145~155 m和155~165 m海拔区段土壤已由酸性发展为碱性,165~175 m区段由酸性发展为中性。(3)相关性分析和回归分析发现:土壤p H值与金属元素含量有密切相关性。其中,土壤pH值与钾、钙、镁含量之间存在显著正相关(p<0.01),与锰、锌、钠(p<0.01)和铁(p<0.05)含量之间存在显著负相关。[结论]经历10次水位涨落期间,消落带不同海拔区段土壤pH值和金属元素含量均发生了不同程度的改变,表明周期性水淹是影响消落带土壤性质的主要因素,海拔和土壤p H值是影响土壤金属元素含量的重要因素,这将为三峡库区消落带不同海拔区段土壤质量的演变趋势预测提供重要的基础依据。
[Objective] To investigate the soil pH value and metal element content in different altitudes(145~155 m,155~165 m, and 165~175 m) of the Three Gorges Reservoir area and to master the dynamics over the past decade(2008-2018), so as to provide data for the subsection monitoring and control, as well as the prediction of soil environmental quality evolution in Three Gorges Reservoir area. [Method] According to the operation Scheduling of the Three Gorges Reservoir area, three secondary shrub sample lands with similar habitat types were selected in the typical fluctuation zone, and the pH value and metal element content in the soil(0-20 cm) at different altitudes were measured to analyze the differences and variations at different elevations and years in 2008, 2009, 2012, 2014, 2015,2016 and 2018. [Result](1) With the periodic fluctuation of water level, the annual changes of soil pH value, potassium, calcium and magnesium contents in the fluctuation zone showed a trend of fluctuating increase, and the contents of iron, manganese and zinc showed a trend of fluctuating decrease, while the contents of sodium showed a trend of decreasing year by year from 2008 to 2018.(2) At different altitudes in each year, the soil pH value and K content showed a pattern of 145~155 m > 155~165 m > 165~175 m, the Fe and Mn contents followed the pattern of 145~155 m < 155~165 m < 165~175 m, the Ca content was relatively abundant in the area of 145~155 m,while the Na, Mg and Zn contents showed no significant difference among different altitudes. By 2018, the soils in the 145~155 m and 155~165 m elevations had developed from acidic to alkaline, and the 165~175 m elevations from acidic to neutral.(3) Correlation analysis and regression analysis showed that the soil pH value was closely related to the content of metal elements. There was a significant positive correlation between soil pH value and the contents of potassium, calcium and magnesium(p < 0.01), and a significant negative correlation between the contents of manganese, zinc, sodium(p < 0.01) and iron(p < 0.05). [Conclusion] During the period of water level fluctuation for 10 times, the soil pH value and metal element content in different elevation sections of the fluctuation zone changed in varying degrees. It shows that periodic flooding is the main factor affecting the soil properties in the fluctuation zone, and elevation and soil pH value are the important factors affecting the content of metal elements. These conclusion could provide references for the prediction of the evolution trend of soil quality in different elevations of the fluctuation zone in the Three Gorges Reservoir area.