Shebl Ahmed, Hassan A A, Salama Dina M, Abd El-Aziz Mahmoud E, Abd Elwahed Mohamed S A
Chemistry Department, Faculty of Science, Ain Shams University, Abbassia, Cairo, Egypt.
Vegetable Research Department, National Research Centre, Giza, Egypt.
Heliyon. 2020 Mar 21;6(3):e03596. doi: 10.1016/j.heliyon.2020.e03596. eCollection 2020 Mar.
Manganese, zinc, and iron are the most essential micronutrients required for plant growth and applied as foliar fertilizers. Herein, a simple template-free microwave-assisted hydrothermal green synthesis technique was adapted to produce manganese zinc ferrite nanoparticles (MnZnFeO NPs) at different temperatures (100, 120, 140, 160 and 180 °C). The prepared nanomaterials were employed at different concentrations (0, 10, 20, and 30 ppm) as foliar nanofertilizers during the squash ( L) planting process. X-ray diffraction patterns of the prepared nanomaterials confirmed successful production of the nanoferrite material. The prepared nanofertilizers showed type IV adsorption isotherm characteristic for mesoporous materials. FE-SEM and HR-TEM imaging showed that the nanoparticles were cubic shaped and increased in particle size with the increase in microwave temperature during production. The impact of application of the synthesized ferrite nanoparticles on vegetative growth, proximate analysis, minerals content and the yield of squash plant was investigated for two consecutive successful planting seasons. The nanoferrite synthesized at 160 °C and applied to the growing plants at a concentration of 10 ppm gave the highest increase in % yield (49.3 and 52.9%) compared to the untreated squash for the two consecutive seasons, whereas the maximum organic matter content (73.0 and 72.5%) and total energy (260 and 258.3 kcal/g) in squash leaves were obtained in plants treated with 30 ppm ferrite nanoparticles synthesized at 180 °C. On the other hand, the maximum organic matter content (76.6 and 76.3%) and total energy (253.6 and 250.3 kcal/g) in squash fruits were attained with plants supplied by 20 ppm ferrite nanoparticles synthesized at 160 °C. These results indicate that the simple template-free microwave-assisted hydrothermal green synthesis technique for the production of manganese zinc ferrite nanoparticles yields nanoparticles appropriate for use as fertilizer for L.
锰、锌和铁是植物生长所需的最基本的微量营养素，并用作叶面肥料。在此，采用一种简单的无模板微波辅助水热绿色合成技术，在不同温度（100、120、140、160和180℃）下制备锰锌铁氧体纳米颗粒（MnZnFeO NPs）。在南瓜（西葫芦）种植过程中，将制备的纳米材料以不同浓度（0、10、20和30 ppm）用作叶面纳米肥料。制备的纳米材料的X射线衍射图谱证实成功制备了纳米铁氧体材料。制备的纳米肥料表现出介孔材料的IV型吸附等温线特征。场发射扫描电子显微镜（FE-SEM）和高分辨率透射电子显微镜（HR-TEM）成像表明，纳米颗粒为立方体形，并且在制备过程中随着微波温度的升高粒径增大。连续两个成功种植季节研究了合成的铁氧体纳米颗粒对南瓜植株营养生长、近似分析、矿物质含量和产量的影响。与未处理的南瓜相比，在连续两个季节中，160℃合成并以10 ppm浓度施用于生长中的植株的纳米铁氧体使产量百分比增幅最高（49.3%和52.9%），而在180℃合成的30 ppm铁氧体纳米颗粒处理的植株中，南瓜叶片中的最大有机质含量（73.0%和72.5%）和总能（260和258.3千卡/克）得以获得。另一方面，在160℃合成的20 ppm铁氧体纳米颗粒处理的植株中，南瓜果实中的最大有机质含量（76.6%和76.3%）和总能（253.6和250.3千卡/克）得以实现。这些结果表明，用于制备锰锌铁氧体纳米颗粒的简单无模板微波辅助水热绿色合成技术产生了适合用作西葫芦肥料的纳米颗粒。
