Iftime Manuela Maria, Ailiesei Gabriela Liliana, Ungureanu Elena, Marin Luminita
Petru Poni Institute of Macromolecular Chemistry, Grigore Ghica Voda Alley, Iasi, Romania.
Petru Poni Institute of Macromolecular Chemistry, Grigore Ghica Voda Alley, Iasi, Romania.
Carbohydr Polym. 2019 Nov 1;223:115040. doi: 10.1016/j.carbpol.2019.115040. Epub 2019 Jul 6.
The paper reports new soil conditioner systems obtained by in situ hydrogelation of chitosan with salicylaldehyde in the presence of urea fertilizer, designed to address both fertilization and water retention of the soil. The new systems were structural, supramolecular and morphological characterized by FTIR spectroscopy, XRD diffraction, POM and SEM microscopy. The rate of urea release has been investigated by NMR analysis and the release mechanism has been assessed by fitting five mathematical models. The formulations showed high water absorbency of 68 g/g, and they induced water holding capacity in soil up to 154% and an increment of the nitrogen content in soil to almost double, leading to a growth of plants with almost 70% higher compared to the reference soil. All these data revealed the new systems as new multifunctional soil conditioner ecoproducts capable to address both fertilizing and water retention issues, with high potential of application for sustainable agriculture.
该论文报道了在尿素肥料存在下壳聚糖与水杨醛原位水凝胶化得到的新型土壤调理剂体系，旨在解决土壤施肥和保水问题。通过傅里叶变换红外光谱（FTIR）、X射线衍射（XRD）、偏光显微镜（POM）和扫描电子显微镜（SEM）对新体系进行了结构、超分子和形态表征。通过核磁共振分析研究了尿素的释放速率，并通过拟合五个数学模型评估了释放机制。这些配方显示出68 g/g的高吸水性，它们使土壤持水能力提高了154%，土壤中的氮含量增加了近一倍，与对照土壤相比，植物生长提高了近70%。所有这些数据表明，新体系是新型多功能土壤调理生态产品，能够解决施肥和保水问题，在可持续农业中具有很高的应用潜力。
