干旱区生态环境知识资源中心(Arid): 银川平原草甸湿地表层土盐分累积特征

Arid

	银川平原草甸湿地表层土盐分累积特征
其他题名	Salt accumulation characteristics of topsoil in meadow wetland in Yinchuan plain
	夏贵菊 1; 何彤慧 1; 于骥 1; 吴春燕 1; 赵永全 2
来源期刊	农业工程学报
ISSN	1002-6819
出版年	2016
卷号	32 期号:5 页码:142-148
中文摘要	银川平原湿地属于典型的绿洲湿地,不仅是生物多样性的载体,还有具有重要的环境调节功能及较高的生产力,但由于其地处于易发生盐分累积的区域,因此,找出银川平原草甸湿地土壤盐分的空间累积特征,对了解银川平原水盐迁移过程对湿地生态系统的影响十分重要。该文采用野外调查、室内分析的方法,研究了银川平原草甸湿地植被的分布特征,草甸湿地土壤盐化等级的划分,盐分累积状况,该研究共设置样地57个,样方123个,根据传统的分类方法将研究区植物群落划分为3个植被型,8个植被亚型,27个群系。根据土壤表层全盐含量0~20 cm,把研究区土壤划分为5个等级:Ⅰ、Ⅱ、Ⅲ、Ⅳ、Ⅴ,它们对应的含盐量分别为≥10、[4~10)、[2~4)、[1~2)和<1 g/kg。银川平原草甸湿地土壤盐分呈自南向北逐渐增加的空间变化;不同草甸植被类型的含盐量大小为盐生草甸>典型草甸>湿生草甸;不同地形部位草甸的盐分含量表现为干湖滩>洪泛平原>堤外湖滩>湿湖滩>渠边沙滩,地下水埋深和水盐循环过程是盐分分布特征的决定性因素。
英文摘要	Belonging to typical oasis wetlands in China, the wetland of Yinchuan not only is the barrier of biodiversity, but also plays a crucial role in environmental regulation and productive improvement. Unfortunately, it is prone to salt accumulation in the wetland. Therefore, it will be of great significance for having a good knowledge on the impact of the process of water and salt migration on wetland ecosystem to find out the spatial accumulation characteristics of soil salinity in the meadow wetlands in Yinchuan Plain. This paper uses the field survey and laboratory analysis methods to research the distribution of vegetation, the classification of soil salinization and the situation of salt accumulation in the meadow wetlands in Yinchuan Plain. In this study, we set up 57 experimental plots with 123 points, and the plant communities in the study area are divided into 3 vegetation types, 8 vegetation subtype s and 27 formations according to the traditional classification. A total of 44 species of plants are investigated, which is a relatively small number; according to the investigation results on the plant communities in ditch wetland in the Yinchuan Plain by Cheng Zhi, the investigated plants reached a total of 87 species, belonging to 31 families and 71 genera, and the plants along ditch slope were divided into hygrophyte, mesophyte and halophyte with plants in ditch base. On the basis of the soil surface salinity (0-20 cm), the soil in the study area is divided into 5 grades:Ⅰ, Ⅱ, Ⅲ, Ⅳ and Ⅴ, and the corresponding salt contents are ≥10, [4~10), [2~4), [1~2)和<1 g/kg, respectively. The results show that soil salt content increases from south to north in the meadow wetlands in Yinchuan Plain. Salinity of different kinds of vegetation meadows is in a descending order as follows:salty vegetation, typical meadow and wet meadow. And Salinity in different topographical meadows is dry lake beach > floodplain > lake beach outside river levee > wet lake beach > sand beach. Buried depth of groundwater and salt-water cycle process are the decisive factors of salt distribution characteristics. Behind the large-scale wetland restoration in Yinchuan Plain, there is a hidden risk of land salinization in the lakeside zone, and if there is no good artificial recharge of irrigation and drainage vent of salt leaching, the natural restoration vegetation in lakeside meadow will be salt meadow or salt shrub. The vegetations artificially planted also have the problems of the accumulation and degradation of soil salinity. The study on the spatial accumulation characteristics of soil salinity in the meadow wetlands of Yinchuan Plain were found out is helpful to understand the biogeochemical cycle, source and sink effect in wetland ecosystem, reveal the salt accumulation effect and its distribution characteristics in the process of wetland development in Yinchuan Plain, and further understand the effect of water and salt migration process of wetland ecosystem in Yinchuan Plain. The results provide the scientific guidance to the lakeside and bank afforestation and ecological construction and to wetland comprehensive utilization, especially wetland grassland construction.
中文关键词	盐分 ; 湿地 ; 土壤 ; 银川平原
英文关键词	salts wetlands soils Yinchuan Plain
语种	中文
国家	中国
收录类别	CSCD
WOS类目	PLANT SCIENCES
WOS研究方向	Plant Sciences
CSCD记录号	CSCD:5667614
来源机构	宁夏大学
资源类型	期刊论文
条目标识符	http://119.78.100.177/qdio/handle/2XILL650/234598
作者单位	1.宁夏大学, 西北退化生态系统恢复与重建教育部重点实验室, 银川, 宁夏 750021, 中国; 2.湖北医药学院, 十堰, 湖北 442000, 中国
推荐引用方式 GB/T 7714	夏贵菊,何彤慧,于骥,等. 银川平原草甸湿地表层土盐分累积特征[J]. 宁夏大学,2016,32(5):142-148.
APA	夏贵菊,何彤慧,于骥,吴春燕,&赵永全.(2016).银川平原草甸湿地表层土盐分累积特征.农业工程学报,32(5),142-148.
MLA	夏贵菊,et al."银川平原草甸湿地表层土盐分累积特征".农业工程学报 32.5(2016):142-148.