干旱区生态环境知识资源中心(Arid): 民勤绿洲不同土地利用类型下土壤水盐的空间分布特征分析

Arid

	民勤绿洲不同土地利用类型下土壤水盐的空间分布特征分析
其他题名	Spatial distribution characteristics of soil water and salt under different land use types in Minqin Oasis
	柳菲; 陈沛源; 于海超; 马金珠
来源期刊	干旱区地理
ISSN	1000-6060
出版年	2020
卷号	43 期号:2 页码:406-414
中文摘要	以石羊河流域下游---民勤绿洲为研究区域,通过野外采样、实地调查和实验分析,对不同土地利用类型下(耕地、林地、草地、湿地、盐碱地、撂荒地和荒漠)土壤的水盐特征进行研究,结果表明研究区土壤含水率整体偏低,范围为5.35% ~ 20.58%,土壤含盐量的平均值为47.02 g·kg~(-1),盐渍化程度严重。土壤含水率和含盐量表现为中等变异性,说明其易受到气候、地形、水文地质以及人为活动的影响。不同土地利用类型下土壤水盐的垂直分布差异显著,土壤含水率在垂直方向上的变化特征较为复杂,但含盐量在垂直方向上主要表现为表聚型和振荡型。民勤绿洲各土层土壤水盐的水平分布均呈条带状分布,土壤含水率整体表现出西高东低,南高北低,而土壤含盐量则表现出相反的趋势。
英文摘要	In the Minqin area,Gansu Province,China, the climate is dry,water resources are scarce,and the ecology is fragile.Over the long history of human development, the land use types and spatial structures of the oasis have undergone many changes,which in turn have affected the stability of the oasis-desert ecosystem.The soil water and salt characteristics have resulted from the combined effects of local natural conditions(e.g.,climate, topography,hydrogeology,and vegetation)and human activities(e.g.,unreasonable irrigation systems,overgrazing,and large reclamation).Unreasonable distribution of soil water and salt will directly lead to soil salinization and even to desertification,which will seriously affect the living environment and human living conditions.Therefore,preventing soil salinization and protecting existing land resources are important tasks for the sustainable development of human society.This study takes the downstream area of the Shiyang River Basin,Minqin Oasis,as a research area;through field sampling, field investigation,and experimental analysis, it is understood that there are significant differences in the soil water and salt characteristics for different land use types.The soil moisture content is generally low and ranges 5.35%- 20.58%.The average salt content is 47.02 g·kg~(-1)and the degree of salinization is severe.Both the soil water and salt contents are moderately variable, thus indicating that they are susceptible to climate, topography,hydrogeology,and human activities.The vertical distribution of soil water and salt under different land use types is significantly different.The variations of soil water content in the vertical direction are more complicated but the salt content mainly appears assurface accumulationandoscillatingin the vertical direction.The degree of variation in soil salinity is obviously greater than the degree of variation of water content.This indicates that the spatial dependence of soil salinity is greater than the soil moisture content.The variations of surface soil water and salt are larger, indicating that the surface soil water and salt levels are susceptible to external factors(such as climate, terrain,and human activities).However,as the depth of the soil layer increases, the effect of external factors gradually weakens, thus resulting in a gradual decrease in the intensity of the variations in soil water and salt levels in the vertical direction.The spatial distribution of soil water and salt in each soil layer in the study area is in the form of strips.The soil moisture content of Minqin Oasis is generally high in the west, low in the east,high in the south,and low in the north,while the soil salinity shows a trend of high in the north, low in the south,high in the east,and low in the west.
中文关键词	民勤绿洲 ; 土壤含水率 ; 含盐量 ; 空间分布
英文关键词	Minqin Oasis soil moisture soil salinity spatial distribution
类型	Article
语种	中文
收录类别	CSCD
WOS研究方向	Environmental Sciences & Ecology
CSCD记录号	CSCD:6753605
来源机构	兰州大学
资源类型	期刊论文
条目标识符	http://119.78.100.177/qdio/handle/2XILL650/336658
作者单位	柳菲, 兰州大学资源环境学院, 西部环境教育部重点实验室, 兰州, 甘肃 730000, 中国.; 陈沛源, 兰州大学资源环境学院, 西部环境教育部重点实验室, 兰州, 甘肃 730000, 中国.; 于海超, 兰州大学资源环境学院, 西部环境教育部重点实验室, 兰州, 甘肃 730000, 中国.; 马金珠, 兰州大学资源环境学院, 西部环境教育部重点实验室, 兰州, 甘肃 730000, 中国.
推荐引用方式 GB/T 7714	柳菲,陈沛源,于海超,等. 民勤绿洲不同土地利用类型下土壤水盐的空间分布特征分析[J]. 兰州大学,2020,43(2):406-414.
APA	柳菲,陈沛源,于海超,&马金珠.(2020).民勤绿洲不同土地利用类型下土壤水盐的空间分布特征分析.干旱区地理,43(2),406-414.
MLA	柳菲,et al."民勤绿洲不同土地利用类型下土壤水盐的空间分布特征分析".干旱区地理 43.2(2020):406-414.