土壤2023，Vol.55Issue(6)：1272-1278,7.DOI:10.13758/j.cnki.tr.2023.06.014
太湖上游圩区氮磷管理的减污效益分析
Pollution Reduction Benefit Analysis of Nitrogen and Phosphorus Management in Polders in Upper Reaches of Taihu Lake
摘要
Abstract
In this study,the polders in the upper reaches of Taihu Lake were taken as the study area,and the dynamic process of N and P loss in polders were simulated using Nitrogen Dynamic model for lowland Polder systems(NDP)and Phosphorus Dynamic model for lowland Polder systems(PDP).Based on the mechanism of N and P loss in polders,the management scenarios were quantitatively simulated and the benefits of N and P pollution reduction were analyzed.The results showed that:1)The annual average loss intensities of N and P in the polders were 40 and 1.75 kg/(hm2·a),respectively,which were higher than the average loss level of Taihu Lake Basin;2)When the water quality in the external rivers of polders was controlled as Grade IV,the loss intensities of N and P were 37.54 and 1.58 kg/(hm2·a)respectively,the amount of N and P intercepted in the polder increased by 4.9%and 9.9%respectively,and the number of polders with strong loss level decreased by 26.2%and 63.8%respectively;3)If 5%of paddy fields in polders were converted into water bodies,the loss intensities of N and P were 36.73 and 1.72 kg/(hm2·a)respectively,the amount of N and P intercepted in polders increased by 6.6%and 1.7%respectively,and the number of polders with strong loss level decreased by 46.2%and 22.5%respectively;4)The loss mechanisms of N and P in the polders were obviously different.The water quality in the external rivers of polders had a strong influence on the loss of P in the polders,and the water bodies and ponds in the polders had a greater advantage for N retention and purification.关键词
平原圩区/太湖流域上游/氮磷流失/管控策略Key words
Lowland polders/Upper reaches of Taihu Basin/Nitrogen and phosphorus loss/Control strategy分类
农业科技引用本文复制引用
王晓杰,张京,高俊峰,洪昕,黄佳聪,李骏..太湖上游圩区氮磷管理的减污效益分析[J].土壤,2023,55(6):1272-1278,7.基金项目
江苏省水利科技项目(2022032,2021036)资助. （2022032,2021036）
