干旱区生态环境知识资源中心(Arid): 绿洲沙漠过渡带柽柳(Tamarix ramosissima)灌丛沙堆-丘间地系统土壤盐分含量特征

Arid

	绿洲沙漠过渡带柽柳(Tamarix ramosissima)灌丛沙堆-丘间地系统土壤盐分含量特征
其他题名	Spatial Variation of Soil Salinity on Tamarix ramosissima Nebkhas and Interdune in Oasis-desert Ecotone
	刘进辉 1; 王雪芹 2; 马洋 1; 谭凤翥 1
来源期刊	中国沙漠
ISSN	1000-694X
出版年	2016
卷号	36 期号:1 页码:181-189
中文摘要	以塔克拉玛干沙漠南缘策勒绿洲西部过渡带为研究区,选取植被盖度为30%、15%~20%、10%、<5%的4个典型样地,对各样地的柽柳(Tamarix ramosissima)灌丛沙堆-丘间地系统典型部位0~10 cm和10~20 cm土壤进行系统采样,测定土壤pH值及总盐、Cl~-、Na~+、K~+、SO_4~(2-) 、Ca~(2+)、Mg~(2+)、CO_3~(2-) 、HCO_3~-含量,从风沙地貌的角度探讨过渡带沙漠化进程中土壤盐分分异规律。结果表明:随着植被总盖度的降低,0~10 cm层土壤pH值及总盐、 Cl~-、K~+、Na~+含量总体呈先升高后降低的趋势;土壤SO_4~(2-)和Ca~(2+)含量呈先降低后升高的变化趋势;Mg~(2+)含量随着植被盖度的变化没有明显的变化规律。灌丛下沙堆边缘丘间地风影区,总盐、Cl~-、K~+、Na~+、SO_4~(2-) 、 Ga~(2+)、Mg~(2+)含量呈先减小后增大的变化规律,最大值均位于灌丛下,最小值位于丘间地;pH值和HCO_3~-含量大体呈先升高后降低的趋势,最小值位于灌丛下,最大值多位于丘间地,二者存在中度相关(r=0.644)。与0~10 cm土层相比,10~20 cm总盐、Cl~-、K~+、Na~+含量明显增加,SO_4~(2-) 、HCO_3~- 、Ga~(2+)含量降低,Mg~(2+)含量和pH值没有明显的变化。两土层各盐分含量随植被盖度的梯变呈相对一致的变化趋势。在不同的环境条件下,以蒸腾作用、泌盐作用和根系的选择性吸收作用等为主的生物积盐作用与地下水蒸发聚盐以及地表风蚀强度等非生物因素之间的平衡关系,应该是影响绿洲沙漠过渡带柽柳灌丛沙堆盐岛效应强弱的关键因素。
英文摘要	In this study four kinds of typical plots,with vegetation cover of 30%, 15%-20%, 10% and <5%respectively,were selected to investigate the spatial variation of soil salinity on Tamarix ramosissima nebkhas and their interdune in Qira oasis-desert ecotone at the southern rim of the Taklimakan desert. Soil samples of 0-10 cm and 10-20 cm layer on T.ramosissima nebkha and interdune in the four plots were collected for analyzing soil pH,and total salinity,Cl~-,Na~+,K~+,SO_4~(2-), Ca~(2+),Mg~(2+),CO_3~(2-) and HCO_3~- content from the perspective of Aeolian landform.Results showed that:(1)With the decrease of vegetation cover from plot 1 to plot 4 soil pH,and total salinity,Cl~-,K~+ and Na~+ content increased firstly and then decreased in0-10 cm layer.The maximum values mainly distribute in the plot that the vegetation cover is 30%,the minimum values mainly distribute in the plot that the vegetation cover is 15%-20%,while the maximum values of HCO_3~- content mainly distribute in the plot that the vegetation cover is 15%-20%, and there is no obvious change of Mg~(2+)content.(2)Total salinity,Cl~-,Na~+,K~+,SO_4~(2-), Ca~(2+)and Mg~(2+) content decreased firstly and then increased from the Under shrub to the Margin of nebkha to the Interdune to the Leeward shadow.However,soil pH and HCO_3~- content increased firstly and then decreased and there was a moderate correlation between soil pH and HCO_3~- content (r=0.644).The maximum values mainly distribute in the ground of Under shrub,while the minimum values mainly distribute in the Interdune.(3) Compared with 0-10 cm soil layer,there was a significant raise of Total salinity,Cl~-,Na~+ and K~+ content in 10-20 cm soil layer.However,there was a reduction of SO_4~(2-), Ca~(2+)and HCO_3~- content and no obvious change of soil pH.With the decrease of vegetation coverage,the various change of soil salinity content in the two soil layers had a consistent trend.(4)The transpiration,recretion and selective absorption of root of T.ramosissima and soil evaporation make obvious soil salinity enrichment effects around the area of Nebkha.However,with the decrease of the total vegetation cover and the increase of desertification intensity, the non-biological factor of wind erosion begin to play a leading role,and soil salinity enrichment effects of shrubs tend to diminish and disappear gradually.
中文关键词	绿洲沙漠过渡带 ; 柽柳(Tamarix ramosissima)灌丛沙堆 ; 土壤盐分 ; 空间异质性
英文关键词	oasis-desert ecotone Tamarix ramosissima Nebkha soil salinity spatial heterogeneity
语种	中文
国家	中国
收录类别	CSCD
WOS类目	AGRICULTURE MULTIDISCIPLINARY
WOS研究方向	Agriculture
CSCD记录号	CSCD:5636760
来源机构	中国科学院新疆生态与地理研究所
资源类型	期刊论文
条目标识符	http://119.78.100.177/qdio/handle/2XILL650/235382
作者单位	1.中国科学院新疆生态与地理研究所, 新疆策勒荒漠草地生态系统国家野外科学观测研究站, 乌鲁木齐, 新疆 830011, 中国; 2.中国科学院新疆生态与地理研究所, 乌鲁木齐, 新疆 830011, 中国
推荐引用方式 GB/T 7714	刘进辉,王雪芹,马洋,等. 绿洲沙漠过渡带柽柳(Tamarix ramosissima)灌丛沙堆-丘间地系统土壤盐分含量特征[J]. 中国科学院新疆生态与地理研究所,2016,36(1):181-189.
APA	刘进辉,王雪芹,马洋,&谭凤翥.(2016).绿洲沙漠过渡带柽柳(Tamarix ramosissima)灌丛沙堆-丘间地系统土壤盐分含量特征.中国沙漠,36(1),181-189.
MLA	刘进辉,et al."绿洲沙漠过渡带柽柳(Tamarix ramosissima)灌丛沙堆-丘间地系统土壤盐分含量特征".中国沙漠 36.1(2016):181-189.