Key Laboratory of Black Soil Conservation and Utilization, Northeast Institute of Geography and Agroecology, Chinese Academy of Sciences, Changchun 130102, China.
College of Advanced Agricultural Sciences, University of Chinese Academy of Sciences, Beijing 100049, China.
Int J Mol Sci. 2024 Feb 5;25(3):1896. doi: 10.3390/ijms25031896.
The extensive utilization of zinc oxide nanoparticles in consumer products and the industry has led to their substantial entry into the soil through air and surface runoff transportation, which causes ecotoxicity in agro-ecosystems and detrimental effects on crop production. Nanobubbles (diameter size < 1 µm) have many advantages, such as a high surface area, rapid mass transfer, and long retention time. In this study, wheat seedlings were irrigated with a 500 mg L zinc oxide nanoparticle solution delivered in the form of nanobubble watering (nanobubble-ZnO-NPs). We found that nanobubble watering improved the growth and nutrient status of wheat exposed to zinc oxide nanoparticles, as evidenced by increased total foliar nitrogen and phosphorus, along with enhanced leaf dry mass per area. This effect can be attributed to nanobubbles disassembling zinc oxide aggregates formed due to soil organic carbon, thereby mitigating nutrient absorption limitations in plants. Furthermore, nanobubbles improved the capability of soil oxygen input, leading to increased root activity and glycolysis efficiency in wheat roots. This work provides valuable insights into the influence of nanobubble watering on soil quality and crop production and offers an innovative approach for agricultural irrigation that enhances the effectiveness and efficiency of water application.
氧化锌纳米粒子在消费品和工业中的广泛应用，导致它们通过空气和地表径流大量进入土壤，从而对农业生态系统产生生态毒性，并对作物生产造成不利影响。纳米气泡（直径 < 1 µm）具有许多优点，例如高表面积、快速传质和长保留时间。在这项研究中，小麦幼苗用纳米气泡浇水（纳米气泡-ZnO-NPs）的形式灌溉了 500mg/L 的氧化锌纳米粒子溶液。我们发现，纳米气泡浇水改善了暴露于氧化锌纳米粒子的小麦的生长和营养状况，表现为总叶氮和磷的增加，以及每单位面积叶片干质量的增加。这种效果可以归因于纳米气泡分解了由于土壤有机碳而形成的氧化锌聚集体，从而减轻了植物中营养吸收的限制。此外，纳米气泡提高了土壤氧气输入的能力，导致小麦根的根活性和糖酵解效率增加。这项工作深入了解了纳米气泡浇水对土壤质量和作物生产的影响，并为农业灌溉提供了一种创新方法，提高了水应用的效果和效率。
