Zhang Zhong-Sheng, Lü Xian-Guo, Song Xiao-Lin
Key Laboratory of Wetland Ecology and Environment, Institute of Northeast Geography and Agroecology, Chinese Academy of 130012, China.
Huan Jing Ke Xue. 2011 Nov;32(11):3429-34.
Mn content and its profile distribution characteristics were investigated in soils from the typical Deyeuxia angustifolia wetland, corn filed, paddy field, poplar forest and island forest in Sanjiang Plain. Results indicated that Mn content was relatively low and was in the range of 107.73-2 798.99 mg/kg with the average value of 403.24 mg/kg. Mn content significantly differed by land use (F = 9.272, P < 0.001) and was in the order of island forest > poplar forest > corn field > Deyeuxia angustifolia wetland > paddy field. On the whole, Mn content in each soil layer was in the order of corn filed > Deyeuxia angustifolia wetland > rice paddy in field and was in the order of island forest > poplar forest in the vertical direction. It suggested that Mn was enriched after wetlands were reclaimed in to the upland filed and Mn concentration was decreased when wetlands were changed into rice paddy. Correlation analysis showed that Mn content in soil significantly negatively related to pH (r = -0.279, P < 0.05), significantly positively related to sulfur (r = 0.383, P < 0.01) and dissolved organic carbon (r = 0.244, P < 0.05), and weakly related to soil organic matter and available sulfur, respectively. Changes of environmental factors had impacts on Mn species and then resulted in soil Mn content.
对三江平原典型小叶章湿地、玉米田、稻田、杨树林和岛状林土壤中的锰含量及其剖面分布特征进行了研究。结果表明，锰含量相对较低，范围为107.73 - 2798.99mg/kg，平均值为403.24mg/kg。锰含量因土地利用方式不同而有显著差异（F = 9.272，P < 0.001），顺序为岛状林>杨树林>玉米田>小叶章湿地>稻田。总体而言，各土层中锰含量顺序为玉米田>小叶章湿地>稻田，垂直方向上为岛状林>杨树林。这表明湿地开垦为旱地后锰被富集，湿地转变为稻田时锰含量降低。相关分析表明，土壤中锰含量与pH显著负相关（r = -0.279，P < 0.05），与硫显著正相关（r = 0.383，P < 0.01）以及与溶解有机碳显著正相关（r = 0.244，P < 0.05），与土壤有机质和有效硫分别呈弱相关。环境因素的变化对锰形态产生影响，进而导致土壤锰含量变化。
