Quantif ication of Non2point Pollution from Uplands in Taihu Lake Catchment

DUAN Liang; DUAN Zengqiang; XIA Siqing

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Quantif ication of Non2point Pollution from Uplands in Taihu Lake Catchment

- Quantif ication of Non2point Pollution from Uplands in Taihu Lake Catchment
- Bulletin of Soiland Water Conservation Vol. 25, Issue 6, Pages: 40-43(2006)
- 作者机构：
  
  1. 同济大学环境科学与工程学院污染控制与资源化研究国家重点实验室,上海,200092
  2. 中国科学院南京土壤研究所土壤与农业可持续发展国家重点实验室,江苏,南京,210008
- 作者简介：
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- Published：2006
- 稿件说明：
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DUAN Liang, DUAN Zengqiang, XIA Siqing. Quantif ication of Non2point Pollution from Uplands in Taihu Lake Catchment[J]. Bulletin of Soiland Water Conservation, 2006, 25(6): 40-43.
DOI：

DUAN Liang, DUAN Zengqiang, XIA Siqing. Quantif ication of Non2point Pollution from Uplands in Taihu Lake Catchment[J]. Bulletin of Soiland Water Conservation, 2006, 25(6): 40-43. DOI：

摘要

采用田间试验方法

研究了太湖地区旱地氮磷向水体排放的年负荷。结果表明

太湖流域典型旱地氮磷向水体迁移的年负荷分别为12.66

4.05 kg/hm

分别约占年施肥量的5.6%和4.1%。示范区内旱地氮磷向水体迁移的年总量为3.86 t和1.24 t。NO

—N和PN是氮流失的主要形式

应重点控制NO

—N和PN的流失;而PP是磷流失的主要形式

占总磷的76%

是控制的重点。氮磷向水体迁移具有明显的季节特征

夏季和秋季为氮磷高负荷季节

6—11月占全年氮磷输出总量的83.4%和79.8%。在当前的非点源污染治理中

应采取有力措施控制农田养分流失。

Abstract

The released nit rogen and phosphorus by surface runoff from uplands in the Taihu Lake catchment were investigated in a case study. Results showed that each year

about 12.66 kg/hm2 of nit rogen and 4.05 kg/ hm2 of phosphorus from the uplands in the catchment were discharged into water body

accounting for 5.6% and 4.1% of annual fertilization

respectively. About 3.86 t of total nitrogen and 1.24 t of total phosphorus f rom the uplands in the demonst ration area were discharged into water body per year. Nit rate —N and PN were the main component part of N loss

which indicates that controlling Nit rate —N and PN loss is the key to controlling non-point pollu-tion. PP was the main component part of phosphorus loss

accounting for 76 % of total phosphorus. Nitrogen and phosphorus loss were obviously characterized by seasonal variation. Summer and autumn were the high load sea- sons

in which nit rogen and phosphorus loss fromJune to November accounted for 83.35 % and 79.79 %of total loads

respectively.We should pay great attention to controlling nutrient loss during farming for non-point pollution control.

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