【摘要】 试验研究水旱轮作稻田表土Mn损失主要机制以及施N水平对植株Mn累积量的影响结果表明 ,施N促进植株对Mn的吸收 ,土壤表层活性锰部分被植株所吸收 ,部分重新积淀在土壤下层 ,只有少部分淋洗出土体 ,收获是土壤Mn损失最主要形式 ,收获物 82 %以上的Mn积存于秸秆中 ,实行秸秆还田是保持土壤Mn肥力的重要途径更多还原

【Abstract】 The organisms of Mn loss from the surface soil of paddy rice and upland crop rotation systems and the effects of the application of N on the plant Mn accumulation are studied in this paper. The results show that the application of N can improve the Mn absorption of plant; a part of active Mn is absorbed by plant, the other part of Mn is deposited in deep soil layer, and only a little part of Mn is leached out from deep layer soil. Harvest is the main form of Mn loss from soil. Because of 82% Mn in rice straw by harvesting, the important way of holding the paddy Mn fertility is to return straw to field.更多还原