河北平原碱化土零星分布,面积较小,与盐渍土相比危害不重,因此,过去没有引起人们足够重视。近来,由于盐渍土不断得到改造,盐分大量脱除,而碱化日益显露。尤其在平原东部地区,发展深井灌溉以后,由于深井水大部分为碱性淡水,灌溉后导致土壤次生碱化。土壤碱化问题已经对农业生产产生了一定影响。 The alkalized soils in Hebei plain sporadic distribution, smaller area, compared with saline soil harm is not heavy, therefore, in the past did not arouse enough attention. Recently, due to the continual transformation of saline soils, a large amount of salt is removed and alkalization is increasingly revealed. Especially in the eastern plain of the plain, after the development of deep-well irrigation, secondary alkaline alkalization of soil resulted from irrigation as most of the deep-well water was alkaline freshwater. Soil alkalization has had some impact on agricultural production.