摘要
西部的生态环境安全关系到国家的生态安全。研究土壤特性及其垂直分布,能对区域生态环境建设和可持续发展提供重要的理论基础和指导。灰钙土与风沙土是新疆伊犁谷地的两种主要土壤类型。本文在对新疆伊犁谷地实地考察基础上,运用42个灰钙土剖面和12个风沙土剖面自然发生层各层的土壤样品测试数据—土壤有机质、pH值、电导率、总盐、八大阴阳离子,研究了灰钙土和风沙土土壤特性的垂直分布,并进行了比较;在此基础上提出区域生态建设中土壤利用和保护的建议。研究表明,伊犁河谷的不同土壤,其土壤特性的垂直分布和变化具有一致性和差异性。一致性体现在有机质和K+的含量随土壤深度增加而减少,pH值、CO32-、Mg2+和Na+的含量随土壤深度增加而增加。差异性体现在两类土壤的有机质、pH值、电导率和总盐在数量上不同。此外,两类土壤的电导率、总盐及SO42-,Cl-,HCO3-,Ca2+的含量随土壤深度发生变化的趋势不同。
Western China is of significance to national ecological integrity for its special geographic location and semiarid/arid climates.Examining the vertical distribution and changes in soil properties would be greatly helpful in achieving regional ecological construction and sustainable development.The Yili River valley lies in the middle of the Tianshan Mountains,west of Xinjiang Uygur Autonomous Region,China.Sierozem and sandy soil are the major soil types in Yili,between which sierozem is the zonal soil along the Yili River valley.Field surveys and sampling of sierozem and sandy soil profiles were conduced from late June throughout early July in 2008.There were 205 samples from each layer of soil profiles collected and tested in the laboratory,including soil organic matter,pH value,electrical conductivity,total salinity,CO32-,HCO3-,Cl-,SO42-,K＋,Na＋,Ca2＋,and Mg2＋from 42 sierozem and 12 sandy soil profiles.The vertical distribution and changes in soil properties of sierozem and sandy soil profiles were investigated.Meanwhile,comparison of soil properties between sierozem and sandy soil profiles was carried out to examine their characteristics.Suggestions were put forward on how to utilize soil reasonably and protect them from salinization and wind erosion,which could serve as a basis for conducting regional ecological construction and realize regional sustainable development.Conclusions were given as follows.The vertical distribution of soil properties showed both consistency and distinction between different soil types along the Yili River valley.The consistency was characterized by decreases in soil organic matter and K＋contents with soil depth,and increases in pH value,CO32-,Mg2＋,and Na＋contents with soil depth.The difference exhibited in the amount of soil organic matter,pH value,electrical conductivity,and total salinity.In addition,there were differences in trends of electrical conductivity,total salinity,SO42-,Cl-,HCO3-,and Ca2＋contents with soil depth between sierozem and sandy soil profiles.SO42-,Cl-,and Ca2＋contents generally increased with soil depth in the sierozem soil profiles,but decreased with soil depth in sandy soil profiles.The HCO3-content decreased with soil depth in sierozem soil profiles as opposed to the sandy soil profiles.
出处
《资源科学》
CSSCI
CSCD
北大核心
2012年第1期195-201,共7页
Resources Science
基金
国家科技支撑计划子专题(编号:2007BAC15B0301-3)
关键词
伊犁
灰钙土
风沙土
生态建设
Yili； Sierozem soil； Sandy soil； Ecological construction；
