Ion Contents of Irrigation Underground Water in the Main Producing Areas of Strawberry and Melon in Beijing
Taking Beijing strawberry and melon as test materials,the irrigation underground water samples of 31 representative fields were collected,and 17 groundwater quality indexes such as EC value,pH and ion content were analyzed.The ion composition and space distribution characteristics of irrigation underground water were studied in main production areas,in order to provide reference for production.The results showed that 83.9％of the water samples were in Grade C2,and the rest were in Grade C3,especially in the southern region,some water quality improvement measures were needed.The pH were in the range of 7.3-8.2,which met the requirements of the national standard basic control project limit of farmland irrigation water quality.93.5％of the samples with SAR＜10 were suitable for irrigation.Changping,Daxing and other districts need to pay attention to the problem of clogged irrigators,which caused by calcium and magnesium ions.The contents of copper ion,zinc ion,boron ion and chloride ion were all within the limits of the national standard.Some areas need to pay attention to the prevention of nitrate,sulfate and total phosphorus pollution of groundwater non-point sources.
万方数据
维普
