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 Sciences, Changchun, 130102, China.
Huan Jing Ke Xue. 2013 Jul;34(7):2782-7.
A detailed investigation was conducted to study the variations of manganese contents and fractions in soil under different land use patterns in Sanjiang Plain, Northeast China. The purpose of this work was to study the changes of manganese and its fractions during wetland cultivation and their relationships with environment factors. The results indicated that the total manganese contents (Mn(tot)) were relatively low in wetland soils. When wetland was cultivated into dry farmland (corn field), M(tot) showed an increasing trend, and when wetland was cultivated into rice paddy, Mn(tot) manifested a decreasing trend. Among the four fractions of manganese in soil, the residual part (Mn(res)) and the reducible part (Mn(red)) were predominant while the acid extractable part (Mn(ext)) and the oxidizable part (Mn(oxi)) were secondary. During the cultivation of wetlands to corn field or rice paddy, Mn(oxi) was the only part with significant change. Mn(tot) and the transformations among manganese fractions were affected by many environmental factors, with sulfur content, pH and dissolved organic carbon playing leading roles.
对中国东北三江平原不同土地利用模式下土壤中锰含量及形态的变化进行了详细调查。这项工作的目的是研究湿地开垦过程中锰及其形态的变化以及它们与环境因素的关系。结果表明，湿地土壤中总锰含量（Mn(tot)）相对较低。当湿地开垦为旱地（玉米田）时，Mn(tot)呈增加趋势；当湿地开垦为稻田时，Mn(tot)呈下降趋势。土壤中锰的四个形态中，残留态（Mn(res)）和可还原态（Mn(red)）占主导地位，而酸提取态（Mn(ext)）和可氧化态（Mn(oxi)）占次要地位。在湿地开垦为玉米田或稻田的过程中，Mn(oxi)是唯一有显著变化的形态。Mn(tot)和锰形态之间的转化受许多环境因素影响，其中硫含量、pH值和溶解有机碳起主要作用。
