农业环境科学学报2011，Vol.30Issue(12)：2571-2578,8.
消融期湿地水环境及其中铁和锰的变化特征
Hydro Environment of Wetland and Variation Iron and Manganese During the Thawing Season
摘要
Abstract
Iron and manganese occur naturally in weT1and, and are proved to be a good indicator for the variation of hydro environment in weT1and. It was reported that freezing and thawing action would not only affect on soil moisture, but also change the chemical properties obviously, I.e. Ascending value pH, increasing the content of organic matter and change the state of metal element occurrence. This research is to explore the hydro environment variation translocation and formation change in reed marsh during the frozen and thawing season. A field experiment was conducted along a 600 m distance transect. Maximum elevation difference was approximately 60 cm. Results indicated that trace of iron and manganese translocation was a good indicator for the variation of wet hydro environment during the freezing and thawing season. A large amount of water was enriched in surface horizon in freezing season, and moisture decreased a lot when thawed completely. The water content in reed march reached as high as 0.8 m3·m-3(to be over-saturated), as a comparison, merely 0.5 m3·m-3 in the marginal of weT1and. pH would decrease along landscape elevation. The low elevation would enrich organic matter content, and increased by 55% during the freezing and thawing season, but minor variation in micro high. Hydro environment at local scale would affect the iron and manganese profile and the translocation process. The iron content would descent along ground elevation. In addition, the iron and manganese would enrich along soil profile and accumulate most in B horizon. The iron and manganese content would change significanT1y during the thawing period, increasing by 80% in micro low (reed marsh). It's interesting to note the concentration of iron and manganese were positive correlation with soil moisture and organic matter but negative correlation with value of pH.关键词
湿地水环境/冻融作用/指示元素Key words
hydro environment/ freezing and thawing action/ indicating element分类
资源环境引用本文复制引用
叶雅杰,杨铁金,罗金明,杨帆..消融期湿地水环境及其中铁和锰的变化特征[J].农业环境科学学报,2011,30(12):2571-2578,8.基金项目
国家自然科学基金项目(41071022) （41071022）
齐齐哈尔大学青年教师科研启动项目(2010M-K26) （2010M-K26）
