成都平原水旱轮作土壤表层锰损失主要机制研究  

The organism of Mn loss from the surface soil for rice/wheat rotation systems in Chengdu Plain

作　　者：王甲辰[1] 张福锁[2] 刘学军[2] 吕世华[3] 曾祥忠[3] 

机构地区：[1]北京有色金属研究总院全国稀土农用中心,北京100088 [2]中国农业大学植物营养系,北京100094 [3]四川省农业科学院土壤肥料研究所,成都610066

出　　处：《中国生态农业学报》2004年第3期72-74,共3页Chinese Journal of Eco-Agriculture

基　　金：国家重点基础研究 ( 973 )发展规划项目 (G19990 1170 7);四川省应用专项基金项目共同资助

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 。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.

关 键 词：成都平原 水旱轮作 土壤表层 锰损失 

分 类 号：S153.6[农业科学—土壤学]