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为了解定边县新增耕地的土壤盐渍化现状,对陕西省定边县盐渍化土壤面积较大的堆子梁镇新增耕地典型地块进行田间采样调查,并对采集的土样和水样及时分析测试。结果表明:定边县堆子梁镇王滩子村、小滩子村、白土岗子村的新增耕地调查地块内0~60cm土层的pH均呈强碱性(pH≥9),土壤全盐量较高;其中,白土岗子村调查地块的0~60cm土层全盐量最重,小滩子村次之,王滩子村最轻。3个调查地块蓄水沟内水样均呈碱性,全盐量322~1 462mg·L~(-1)。根据调查区域的新增耕地盐渍化现状,参考当地及邻近地区较成功的盐渍土改良经验,针对性的总结了耕作措施、地表覆盖措施、隔盐措施、化学措施、灌溉措施、植物措施等改良措施的原理及优缺点,以便为治理定边县盐渍化新增耕地提供技术参考。
In order to understand the status of soil salinization in newly-added cultivated land in Dingbian County, a field sampling survey was conducted on the typical plots of newly-added cultivated land in Dianziliang Town with large salinized soil in Dingbian County, Shaanxi Province. Soil samples and water Sample timely analysis and testing. The results showed that the pH value of 0 ~ 60cm soil layer in the new cultivated land surveyed in Wangtanzi Village, Xiaotanzi Village and Baituo Kongzi Village, Dianzhai Village, Dianbian County was strongly alkaline (pH≥9) The whole salt content is high. Among them, the survey of 050cm soil layer in Baishigangzi village has the highest total salt content, followed by Xiaokanzi village, and Wangtanzi village is the lightest. All the water samples in the three investigation plots were all alkaline with the total salt content of 322-1 462 mg · L -1. According to the status of newly-added cultivated land salinization in the survey area and with reference to the successful experience of saline land improvement in the locality and its neighboring areas, the tillage measures, surface covering measures, salt separating measures, chemical measures, irrigation measures and plant measures Such as the principle and advantages and disadvantages of improved measures in order to provide technical reference for the treatment of the newly added arable land for salinization in Dingbian County.