广大农村对灌溉水的水质要求不严,一般认为只要是甜水(矿化度不高的淡水)都可用于灌溉。其实凡不符合灌溉水质指标的水源,是不能盲目引入农田的。 据《水利水电技术》1982年第4期中文章介绍,河北盐山县小王庄大队于1969年打了一眼出水量为120吨/小时的深井,井水矿化度仅为1.23克/升。农田经浇灌三年后,土壤板结,形成瓦碱,粮食亩产由原来的300斤下降到90多斤。又如河北黄骅县大 The vast majority of rural areas are not strict with the quality of irrigation water and generally think that sweet water (low salinity fresh water) can be used for irrigation. In fact, those who do not meet the irrigation water quality indicators of water can not be blindly introduced into the farmland. According to “Water Conservancy and Hydropower Technology”, No. 4, 1982, the Xiaowangzhuang Brigade of Hebei Yanshan County took a glance at a deep well of 120 tons / hour in 1969 with a well water salinity of only 1.23 g / l. Three years after the farmland was irrigated, the soil compacted and formed a tile base. The output per mu of grain fell from over 300 jin to 90 kilos. Another example is the Hebei Huanghua County