草业学报2017，Vol.26Issue(5)：15-28,14.DOI:10.11686/cyxb2016269
黑河自然保护区沼泽湿地土壤化学 性质的空间分布特征研究
Spatial distribution and chemical properties of marsh wetland soil in the Heihe Nature Reserve
摘要
Abstract
The aim of this study was to analyze the spatial distribution of soils with different chemical properties in the marsh wetland of the Heihe Nature Reserve,Zhangye.A field study was conducted in the marsh wet-land,and soil samples were collected for chemical analyses in the laboratory.Using spatial distribution instead of time succession,descriptive statistics and linear regressions of data were used to explore the distribution of available nutrients,organic matter,soil total salt content,and pH in the marsh soils.The soil organic matter levels significantly increased with increasing soil depth.As the soil depth increased,the available nitrogen con-tent showed a clear vertical differentiation,first increasing and then decreasing.Available phosphorus,availa-ble potassium,and total salt content showed the same distribution patterns;that is,significant accumulation in surface soils.There was no significant difference in the spatial distribution of pH,but soil in this region is al-kaline to strongly alkaline.Soil organic matter and pH showed a weak negative correlation,because pH indi-rectly affects the soil organic matter content by inhibiting growth.The total salt content was strongly correla-ted with available potassium.The variability coefficients of total salt,soil organic matter,available nitrogen, available phosphorus,and available potassium had medium values,while that of pH had a low value.The marsh wetland in Heihe is deteriorating because of a lack of soil and water conservation in arid and semiarid re-gions.Long-term experimental research to monitor changes in soils in sensitive areas is required for their pro-tection and restoration.关键词
沼泽湿地/速效养分/全盐/有机质/空间分布/黑河湿地Key words
marsh wetland/available nutrient/total salt/organic matters/spatial distribution/Heihe wetland引用本文复制引用
白娜,王立,孔东升..黑河自然保护区沼泽湿地土壤化学 性质的空间分布特征研究[J].草业学报,2017,26(5):15-28,14.基金项目
国家自然科学基金项目(31460113)和甘肃省自然科学基金(1308RJZA256)资助. （31460113）
