干旱区生态环境知识资源中心(Arid): 干旱区绿洲土壤盐渍化分析评价

Arid

	干旱区绿洲土壤盐渍化分析评价
其他题名	Analysis and evaluation of soil salinization in oasis of arid region
	姜凌; 李佩成; 胡安焱; 易秀
ISSN	1000-6060
出版年	2009
卷号	32 期号:2 页码:234-239
中文摘要	内蒙古阿拉善左旗贺兰山西侧是我国典型的干旱区,土壤盐渍化现象严重.因此,本次研究对该区存在的土壤盐渍化生态环境地质问题进行评价,分析了土壤盐渍化影响因素,提出了盐渍化防治措施.结果表明:(1)研究区内盐渍化土壤占全区面积的32%,且pH值高,碱化度大,具有盐化与碱化同时进行的双重特性;(2)土壤可溶性离子组成以Na~+和SO_4~(2-)、Cl~-离子为主,Na_2SO_4和NaCl是造成该土壤碱化和性质恶化的主要因素;(3)土壤盐分季节变化明显;(4)土壤盐渍化的形成原因主要是残余积盐和灌溉的影响;(5)在改良利用方面,应在综合规划与合理布局的基础上.因地制宜的发展农林牧业,尽快停止使用不符合标准的水进行灌溉,防止生态环境遭受破坏与盐溃化加剧,已垦的盐渍土耕地,尤应重视土壤培肥.
英文摘要	Alashan Prefecture pastoral area of Inner Mongolia was atypical arid area, where mineral, land and agri-cultural resources were very rich. However, a large area of soil was salinized due to irrational development, which resulted in grassland degradation and desertification increasing, and seriously obstructed and constrained sustain-able development of local agricultural economy. Soil salinization has become one of the important factors to limit economic sustainable growth. Therefore, it is important to analyze and evaluate soil salinization of this typical arid oasis. In order to find out the distributing characters of soil salinization, the 61 soil profiles were emplaced propor-tionally in studying area. Soil salinity, pH value and ion contents of 0 - 10 cm, 10 -20 cm,20 -40 cm,40 -70 cm,70-100 cm and 100- 150 cm soll layer were analyzed. At the same time total dissolved solid (TDS) of 16 water samples in unconfined aquifer were collected and tested. According to analysis results, the following subjects were studied:soil salinity distribution patterns of plough layer, variety patterns of soil salinity in different seasons,calcium carbonate profile in different layers and mineralization isopleths of unconfined aquifer. Then the influencing factors of soil salinization were analyzed. Prevention measures were provided. The results showed as flows: ( 1 ) The area of soil salt content which was higher than 1% accounted for 32% of the whole region, and the salt contents of soil in southwest part were higher than that in northeast part, which was consistent with the distribution of the total dissolved solid (TDS) of water in unconfined aquifer. These indicated the phenomenon of soil salinization was widespread and the main reason of soil salinization is due toirrigation water quality. (2) The primary soluble ions were Na~+ and SO_4 ~(2-),Cl~-, it is reputed that the first cause of soil alkalization is created by Na_2SO_4 and NaC1. Tes-ting results of pH value show that the pH value of soil in the majority was higher than 8.5, which illuminated it had the double characteristics of salinization and basification. (3) The soil salinity represents the significantly seasonal varying. On the soil profile strong lime reaction was obvious from top to down, most of calcium carbonate was accu-mulated in the middle or lower layer, and the accumulated depth of calcium carbonate became deeper and deeper gradually from cast to west. (4) In order to amend and develop the saline soil, comprehensive planning and rea-sonable layout should be needed. Agriculture, forest, and pastures should be developed based on the local condi-tions. In order to prevent the damage of eco-environment and salinization, in the saline plowland, the soil fertility should be improved. The study results provided a theoretical basis and practical reference for the study region as well as the vast arid area oasis to manage scientifically, use rationally and improve precisely salinized soil.
中文关键词	土壤盐渍化 ; 盐分剖面类型 ; 干旱区绿洲
英文关键词	soil-salinization salinity profile types arid region oasis
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:3583238
资源类型	期刊论文
条目标识符	http://119.78.100.177/qdio/handle/2XILL650/223541
作者单位	长安大学环境科学与工程学院, 西安, 陕西 710054, 中国
推荐引用方式 GB/T 7714	姜凌,李佩成,胡安焱,等. 干旱区绿洲土壤盐渍化分析评价[J],2009,32(2):234-239.
APA	姜凌,李佩成,胡安焱,&易秀.(2009).干旱区绿洲土壤盐渍化分析评价.,32(2),234-239.
MLA	姜凌,et al."干旱区绿洲土壤盐渍化分析评价".32.2(2009):234-239.