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滨海土壤盐碱化已成为当今世界的重大土地问题之一,如何改良和利用盐碱土成为亟待解决的问题。本文采用经预处理的柠檬酸生产废水对黄河三角洲某滨海油田附近的轻度盐碱化土壤进行灌溉改良,通过改良前后土壤物理化学性质的变化,初步分析柠檬酸生产废水灌溉改良盐碱土的效果和可行性。试验结果表明,经柠檬酸生产废水灌溉45d后,盐碱土的pH值、电导率都有所下降;饱和含水率与清水灌溉相比有较大程度的提高;土壤有机质、总氮等营养成分提高显著。这说明盐碱土的理化性状和营养状况都得到了明显改善。因此,柠檬酸生产废水有望作为盐碱土理化性质的有效改良剂,达到“以废治废”的目的。
Salinization of coastal soil has become one of the major land problems in the world today. How to improve and utilize saline-alkali soil has become an urgent problem to be solved. In this paper, pretreated citric acid wastewater was used to improve mild saline soil around a coastal oil field in the Yellow River Delta. The effects of citric acid wastewater treatment on the improvement of saline-alkali soil were analyzed through the changes of soil physical and chemical properties before and after the improvement. And feasibility. The results showed that pH value and conductivity of saline-alkali soil decreased after 45 days of citric acid wastewater treatment. Saturated water content increased greatly compared with that of fresh water irrigation. The content of soil organic matter and total nitrogen increased Significant. This shows that saline-alkali soil physical and chemical properties and nutritional status have been significantly improved. Therefore, the citric acid production wastewater is expected to serve as an effective modifier for the physical and chemical properties of saline-alkali soil so as to achieve the goal of “treating waste and disposing waste”.