太湖上游流域农业土地的氮剩余及其对湖泊富营养化的影响  

Nitrogen surplus of the upstream agricultural land of Lake Taihu and the eutrophication impact

作　　者：许朋柱[1] 秦伯强[1] Horst Behrendt 黄文钰[1] 于树梅[1] 章永鹏[1] 

机构地区：[1]中国科学院南京地理与湖泊研究所,南京210008 [2]德国淡水生态与内陆渔业研究所,柏林d12587

出　　处：《湖泊科学》2006年第4期395-400,共6页Journal of Lake Sciences

基　　金：中国科学院知识创新工程项目(KZCX1-SW-12);德国科学基金会(DAAD)资助

摘　　要：太湖上游流域农业土地中氮的剩余对太湖的富营养化具有至关重要的影响．利用2002年各乡镇的农业统计资料,对上游流域农业土地中氮的剩余量进行计算．计算结果表明,上游流域农业土地中氮的剩余总量为134．8×103t/a,单位农业土地面积的剩余量为178．9 kg/(hm2·a)．从单位面积氮剩余量的空间变化看,东、西苕溪流域的剩余量较低,而其它流域的剩余量相对较高．借助典型区域氮剩余的长系列计算数据,对上游地区氮剩余的长期变化规律进行分析．并在此基础上,探讨太湖的富营养化演变趋势与氮剩余长期变化的关系．The nitrogen surplus of the upstream agricultural land have a great impact on the eutrophication of the Lake Taihu. Based on the suburban agrieuhural data of the year 2002, the nitrogen surplus was calculated for the agrieuhural land of the upstream Taihu. The calculation results show that the agrieuhural land has a total surplus of 134.8 ×10^3 t/a, and the kilogram surplus per hectare agricultural land is 178.9 kg per year. The east and west Tiaoxi catchments have lower surplus values less than 130 kg/（ hm^2·a） , but the other regions have higher values. According to the long calculated series of the N-surplus in the ease-study region, the long-term N-surplus changes for the whole upstream area of the Lake Taihu are analyzed in the paper. At last, the authors discuss the relationship of the eutrophication trend of the Lake Taihu and N-surplus changes in the upstream agrieuhural land.

关 键 词：太湖上游 农业土地 氮的剩余量 富营养化 

分 类 号：X592[环境科学与工程—环境工程]