Dalei Ganeswar, Pattanaik Chiranjib, Patra Ritisma, Jena Debasis, Das Bijnyan Ranjan, Das Subhraseema
Department of Chemistry, Odisha University of Technology and Research, Bhubaneswar 751029, Odisha, India.
Department of Chemistry, Ravenshaw University, Cuttack 753003, Odisha, India.
Int J Biol Macromol. 2024 Dec;282(Pt 1):136704. doi: 10.1016/j.ijbiomac.2024.136704. Epub 2024 Oct 21.
With the growing awareness on the adverse effects of conventional fertilizers; the use of sustainable and controlled release fertilizers has garnered much significance. In the present study, we report the synthesis of chitosan-benzaldehyde Schiff base xerogel incorporated with green synthesized cerium oxide nanoparticle using Psidium guajava leaves extract as a sustainable fertilizer. Spherical CeO NPs having an average particle size of 15.3 nm and zeta potential of - 39.9 mV was obtained. The urea-loaded nanocomposite xerogel (CsB@U/CeO) was examined for cabbage growth. The water retention capacity extended for >2 weeks. A controlled release profile for urea was accomplished from CsB@U/CeO for a period extending for 30 days. The kinetics assay suggested that presence of CeO NPs asserted a greater role in urea-controlled release from the CsB@U/CeO nanocomposite hydrogel owing to polymer relaxation. The growth parameters of cabbages such as head height, diameter, fresh head weight, head circumference was enhanced in plants fertilized by CsB@U/CeO as compared to urea. Furthermore, the phenolic content, free radical scavenging activity, protein content, sugar and flavonoid content were also found higher in CsB@U/CeO fertilized plants. This study puts forth CsB@U/CeO xerogel can be potentially harnessed as an alternative to urea in sustainable agriculture.
随着人们对传统肥料负面影响的认识不断提高，可持续和控释肥料的使用变得愈发重要。在本研究中，我们报道了以番石榴叶提取物为可持续肥料，合成了负载壳聚糖-苯甲醛席夫碱干凝胶并掺入绿色合成的氧化铈纳米颗粒。获得了平均粒径为15.3 nm、zeta电位为-39.9 mV的球形CeO纳米颗粒。对负载尿素的纳米复合干凝胶（CsB@U/CeO）进行了白菜生长试验。其保水能力可延长超过2周。CsB@U/CeO实现了尿素30天的控释曲线。动力学分析表明，由于聚合物松弛，CeO纳米颗粒的存在在CsB@U/CeO纳米复合水凝胶的尿素控释中发挥了更大作用。与施用尿素相比，用CsB@U/CeO施肥的白菜植株的生长参数，如菜头高度、直径、新鲜菜头重量、菜头周长均有所提高。此外，在CsB@U/CeO施肥的植株中，酚类含量、自由基清除活性、蛋白质含量、糖和黄酮类含量也更高。本研究提出，CsB@U/CeO干凝胶在可持续农业中有望作为尿素的替代品。
