摘要
为研究博斯腾湖流域农田非点源污染问题,选取流域典型农田作为研究对象,通过野外实地调查、现场监测与实验室分析相结合的方法,研究农田与排渠氮磷营养物的变化特征。结果表明,在当地典型农田灌排条件下,田间施肥利用率较低,对土壤中氮、磷浓度影响较大,以硝态氮(NO-3-N)为主的氮、磷流失较严重,沿程浓度累积明显;在排渠中,总氮(TN)浓度变化较为明显,氨态氮(NH+4-N)、NO-3-N、总磷(TP)沿程浓度变化呈微弱上升趋势。大量污染物随排水汇入博斯腾湖,导致博斯腾湖水质日益恶化。
In order to study the characteristic of farmland non-point source pollution of Bosten Lake Basin, this paper selects typical farmland of basin as the research object and studies the variation characteristics of nitrogen and phosphorus nutrients in typical farmland and drainage ditches through the method combining field survey, field monitoring and laboratory analysis. The results show that under the local typical farmland irrigation and drainage condition, the low utilization rate of field fertilization has great impact on the concentration of nitrogen and phosphorus in the soil, the loss of nitrogen and phosphorus, especially NO3- N, is serious, the concentration accumulation is significant. In the drainage ditches, the change of TN concentration are more obvious, the change of NH4＋ --N,NO3--N,TP concentration shows slight upward trend. A large number of pollutants discharge into the Bosten Lake, which leads to the water quality deterioration of Bosten Lake day by day.
出处
《节水灌溉》
北大核心
2014年第9期57-59,62,共4页
Water Saving Irrigation
基金
自治区公益性科研院所基本科研业务经费资助项目(KY2012107)
关键词
博斯腾湖
农田
排水渠
氮磷
变化特征
Bosten Lake
farmland
drainage ditches
nitrogen and phosphorus
variation characteristics
