乌梁素海不同芦苇斑块对湖水氮磷含量影响分析

Analyzing Effects of Different Reed Patches on Contents of N and P in Water Column of the Lake Wuliangsuhai

农田退水和废污水的排入导致乌梁素海湿地环境发生改变,富营养化的程度日益严重.本文研究了乌梁素海不同芦苇斑块对总氮和总磷的吸收特征,发现底泥主要富集磷、湖水氮含量比较高,不同芦苇斑块对N、P的影响程度不同,长斑块中部芦苇吸收N最强,近岸芦苇吸收P最强,而短斑块近湖心部分芦苇吸收N、P最强,主要依赖不同位置芦苇斑块的生长状态.

Farmland retreat and sewage entering the lake Wuliangsuhai in the Hetao irrigation region of Inner Mongolia make water environment changed,and eutrophication in this lake is becoming more and more serious.This experiment studied the characteristics of total nitrogen and phosphorus absorbed by the different reed patches,and found P enrichment in the sediment and N in the lake water,and the different reed patches played the various effects on N and P absorption,which included N enrichment of reed existed in the middle of the long patch and its P enrichment near lake side while for the short patch N and P enrichment occurred near the central lake.This was ascribed to the reed growth characteristics at the different patch locations.