曲周县机井水矿化度及对粮食生产的影响研究

为了探明河北曲周县农业灌溉机井的水质情况及其对粮食产量的影响，就不同深度机井水取样测定了其矿化度，并调查了使用不同机井灌溉的小麦、玉米产量。结果表明，曲周县机井水矿化度整体分布呈现西南高、东北低的趋势。深井水矿化度较低，平均为1.473 g/L，属于淡水；浅井水矿化度较高，平均达到3.826 g/L，属于微咸水。在对粮食生产的影响上，调查结果表明，浅井灌溉小麦、玉米的单位产量较深井灌溉分别减少4.81%、4.06%。对曲周县整体粮食生产而言，每年因浅层微咸水灌溉造成的小麦、玉米产量损失分别达到446.36×104 kg、402.8×104 kg，直接经济损失高达1823.52万元，因此对县域的农业生产造成了巨大的影响，应当引起足够的重视。

Survey on Groundwater Mineralization Degree of Quzhou County and Its Influence on Food Production

In order to study water quality conditions of agricultural irrigation motor-pumped wells and its influence on food yield in Quzhou, Hebei Province, the author measured groundwater mineralization of different depth motor-pumped wells, and investigated wheat, maize yield using those groundwater to irrigate. The results showed that： mineralization degree of water in Quzhou had the trend that value decreased from southwest to northeast. And water salinity of deep wells was low, the average value was 1.473 g/L, it belonged to freshwater; the shallow well water had higher salinity, its average value was 3.826 g/L, it belonged to brackish water. On the influence of food production, the survey results showed that the yield of wheat and maize irrigated by shallow wells was decreased by 4.81%, 4.06 % every year than those irrigated by deep wells respectively. To Quzhou overall grain production, wheat and maize yield would decrease 4.4636 and 4.028 million kilograms respectively every year, direct economic loss was as high as 18.2352 million yuan. So above all, to agricultural development of the county, shallow brackish water irrigation had caused tremendous production and economic losses on local food production and it should cause our enough attention.